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14 results on '"B., Reggiani"'

1. A novel algorithm for a continuous and fast 3D projection of points on triangulated surfaces for CAM/CAD/CAE applications

Author

L. Orazi and B. Reggiani

Subjects
Projection method, Triangle mesh, Vertex normals, Parameterization, Bilinear projection, Continuous projection, Electronic computers. Computer science, QA75.5-76.95
Abstract

In the present work, a novel algorithm for the continuous projection of point triangles belonging to a triangle mesh is presented. The algorithm uses the normals defined at the vertices of the triangle to perform the projection. The direction of projection is not chosen a priori but depends on the point to be projected: the proposed algorithm, named Fast Continuous Projection method (FCP) lets the projection direction vary continuously on the mesh. Moreover, the direction is coherent with the original surface that is approximated with the triangle mesh. An optimized version of the algorithm is also presented: this uses pre-evaluated matrices to reduce the calculation time. This algorithm can be effectively used when a large set of points has to be projected on a coarse mesh as, for example, to generate the scanning vectors for laser engraving/milling.

Published
2022
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2. Correlation between mpMRI-detected lesions and definite neoplastic foci at radical prostatectomy: Level of agreement in terms of size and proximity to the capsule

Author

E. Morini, L. Marzotta, M.C. Sighinolfi, B. Filippi, C. Del Prete, A. Iseppi, A. Eissa, B. Reggiani, M. Rizzo, P. Torricelli, M. Sandri, M. Paterlini, S. Micali, G. Bianchi, and B. Rocco

Subjects
Diseases of the genitourinary system. Urology, RC870-923, Neoplasms. Tumors. Oncology. Including cancer and carcinogens, RC254-282
Published
2020
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3. Effetto supporto, tensione locale e gradiente relativo di tensione nella predizione della vita a fatica

Author

B. Reggiani and A. Freddi

Subjects
Effetto supporto, Gradiente relativo di tensione, Tensione locale, Fatica ad alto numero di cicli, Mechanical engineering and machinery, TJ1-1570, Structural engineering (General), TA630-695
Abstract

Obiettivo ultimo delle ricerche nelle quali si inquadra questo studio è superare, o almeno limitare, la necessità di complicate e costose prove sperimentali a favore di altri metodi predittivi della vita a fatica. Scopo specifico del presente lavoro è la valutazione di una formulazione proposta in letteratura per predire, tramite analisi agli Elementi Finiti, la vita a fatica locale, nella regione ad alto numero di cicli, di componenti con qualunque distribuzione irregolare di tensione. Concetto base di questa nuova teoria è che il fenomeno della vita a fatica sia governato dal gradiente relativo di tensione nella zona maggiormente sollecitata del componente. Le equazioni proposte dalla nuova teoria per il calcolo della pendenza delle curve S-N e del limite di fatica sono verificate tramite il confronto con dati sperimentali tratti da letteratura. Mentre la formulazione per il calcolo del limite di fatica mostra un buon accordo con i dati sperimentali (errore medio percentuale del 7%), la pendenza valutata mediante l’equazione proposta risulta sovrastimata (errore medio percentuale del 123%). Si presenta quindi una nuova formula che permette di ottenere un errore medio percentuale del 24% sulla pendenza nel confronto con i dati sperimentali.

Published
2008

4. A Numerical Modelling Approach for Time-Dependent Deformation of Hot Forming Tools under the Creep-Fatigue Regime

Author

B. Reggiani, L. Donati, and L. Tomesani

Subjects
Materials of engineering and construction. Mechanics of materials, TA401-492
Abstract

The present study was aimed at predicting the time-dependent deformation of tools used in hot forming applications subjected to the creep-fatigue regime. An excessive accumulated plastic deformation is configured as one of the three main causes of premature failure of tools in these critical applications and it is accumulated cycle by cycle without evident marks leading to noncompliant products. With the aim of predicting this accumulated deformation, a novel procedure was developed, presented, and applied to the extrusion process as an example. A time-hardening primary creep law was used and novel regression equations for the law’s coefficients were developed to account not only for the induced stress-temperature state but also for the dwell-time value, which is determined by the selected set of process parameters and die design. The procedure was validated against experimental data both on a small-scale extrusion die at different stress, temperature, load states, and for different geometries and on an industrial extrusion die which was discarded due to the excessive plastic deformation after 64 cycles. A numerical-experimental good agreement was achieved.

Published
2016
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5. Effetto supporto, tensione locale e gradiente relativo di tensione nella predizione della vita a fatica

Author

B. Reggiani and A. Freddi

Subjects
Mechanical engineering and machinery, TJ1-1570, Structural engineering (General), TA630-695
Abstract

Obiettivo ultimo delle ricerche nelle quali si inquadra questo studio è superare, o almeno limitare, la necessità di complicate e costose prove sperimentali a favore di altri metodi predittivi della vita a fatica. Scopo specifico del presente lavoro è, dopo una analisi critica delle diverse soluzioni proposte in letteratura, la valutazione di una formulazione atta a predire, tramite analisi agli Elementi Finiti (FEM), la vita a fatica locale, nella regione ad alto numero di cicli, di componenti di forma complessa con una distribuzione irregolare di tensione. Concetto base di questa teoria è che il fenomeno della vita a fatica sia governato dal gradiente relativo di tensione nella zona maggiormente sollecitata del componente. Le simulazioni proposte per il calcolo della pendenza delle curve S-N e del limite di fatica sono verificate tramite il confronto con dati sperimentali tratti da letteratura. Mentre la formulazione per il calcolo del limite di fatica mostra un buon accordo con i dati sperimentali (errore medio percentuale del 7%), la pendenza valutata mediante l'equazione proposta risulta in alcuni casi sovrastimata (errore medio percentuale oltre il 100%). Nel presente lavoro si propone quindi una nuova formula che permette di ottenere un errore medio percentuale sulla pendenza dell'ordine del 20% nel confronto con i dati sperimentali.

Published
2013
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6. Deep underground neutrino experiment (DUNE) near detector conceptual design report

Author

Abud, A.A. Abi, B. Acciarri, R. Acero, M.A. Adamov, G. Adams, D. Adinolfi, M. Aduszkiewicz, A. Ahmad, Z. Ahmed, J. Alion, T. Monsalve, S.A. Alrashed, M. Alt, C. Alton, A. Amedo, P. Anderson, J. Andreopoulos, C. Andrews, M.P. Andrianala, F. Andringa, S. Anfimov, N. Ankowski, A. Antonova, M. Antusch, S. Aranda-Fernandez, A. Ariga, A. Arnold, L.O. Arroyave, M.A. Asaadi, J. Aurisano, A. Aushev, V. Autiero, D. Ayala-Torres, M. Azfar, F. Back, A. Back, H. Back, J.J. Backhouse, C. Baesso, P. Bagaturia, I. Bagby, L. Balasubramanian, S. Baldi, P. Baller, B. Bambah, B. Barao, F. Barenboim, G. Barker, G.J. Barkhouse, W. Barnes, C. Barr, G. Monarca, J.B. Barros, N. Barrow, J.L. Basharina-Freshville, A. Bashyal, A. Basque, V. Belchior, E. Battat, J.B.R. Battisti, F. Bay, F. Alba, J.L.B. Beacom, J.F. Bechetoille, E. Behera, B. Bellantoni, L. Bellettini, G. Bellini, V. Beltramello, O. Belver, D. Benekos, N. Neves, F.B. Berkman, S. Bernardini, P. Berner, R.M. Berns, H. Bertolucci, S. Betancourt, M. Rodríguez, A.B. Bhattacharjee, M. Bhuller, S. Bhuyan, B. Biagi, S. Bian, J. Biassoni, M. Biery, K. Bilki, B. Bishai, M. Bitadze, A. Blake, A. Blaszczyk, F.D.M. Blazey, G.C. Blucher, E. Boissevain, J. Bolognesi, S. Bolton, T. Bomben, L. Bonesini, M. Bongrand, M. Bonini, F. Booth, A. Booth, C. Bordoni, S. Borkum, A. Boschi, T. Bostan, N. Bour, P. Bourgeois, C. Boyd, S.B. Boyden, D. Bracinik, J. Braga, D. Brailsford, D. Brandt, A. Bremer, J. Brew, C. Brianne, E. Brice, S.J. Brizzolari, C. Bromberg, C. Brooijmans, G. Brooke, J. Bross, A. Brunetti, G. Brunetti, M. Buchanan, N. Budd, H. Cagnoli, I. Caiulo, D. Calafiura, P. Calcutt, J. Calin, M. Calvez, S. Calvo, E. Caminata, A. Campanelli, M. Cankocak, K. Caratelli, D. Carini, G. Carlus, B. Carniti, P. Terrazas, I.C. Carranza, H. Carroll, T. Castaño Forero, J.F. Castillo, A. Castromonte, C. Catano-Mur, E. Cattadori, C. Cavalier, F. Cavanna, F. Centro, S. Cerati, G. Cervelli, A. Villanueva, A.C. Chalifour, M. Chappell, A. Chardonnet, E. Charitonidis, N. Chatterjee, A. Chattopadhyay, S. Chen, H. Chen, M. Chen, Y. Chen, Z. Cherdack, D. Chi, C. Childress, S. Chiriacescu, A. Chisnall, G. Cho, K. Choate, S. Chokheli, D. Choubey, S. Christensen, A. Christian, D. Christodoulou, G. Chukanov, A. Church, E. Cicero, V. Clarke, P. Coan, T.E. Cocco, A.G. Coelho, J.A.B. Conley, E. Conley, R. Conrad, J.M. Convery, M. Copello, S. Corwin, L. Cremaldi, L. Cremonesi, L. Crespo-Anadón, J.I. Cristaldo, E. Cross, R. Cudd, A. Cuesta, C. Cui, Y. Cussans, D. Dabrowski, M. Dalager, O. Da Motta, H. Da Silva Peres, L. David, C. David, Q. Davies, G.S. Davini, S. Dawson, J. De, K. De Almeida, R.M. Debbins, P. De Bonis, I. Decowski, M.P. De Gouvêa, A. De Holanda, P.C. De Icaza Astiz, I.L. Deisting, A. De Jong, P. Delbart, A. Delepine, D. Delgado, M. Dell’Acqua, A. De Lurgio, P. De Mello Neto, J.R.T. De Muth, D.M. Dennis, S. Densham, C. Deptuch, G.W. De Roeck, A. De Romeri, V. De Souza, G. Dharmapalan, R. Diaz, F. Díaz, J.S. Di Domizio, S. Di Giulio, L. Ding, P. Di Noto, L. Distefano, C. Diurba, R. Diwan, M. Djurcic, Z. Dokania, N. Dolan, S. Dolinski, M.J. Domine, L. Douglas, D. Douillet, D. Drake, G. Drielsma, F. Duchesneau, D. Duffy, K. Dunne, P. Durkin, T. Duyang, H. Dvornikov, O. Dwyer, D.A. Dyshkant, A.S. Eads, M. Earle, A. Edmunds, D. Eisch, J. Emberger, L. Emery, S. Ereditato, A. Escobar, C.O. Eurin, G. Evans, J.J. Ewart, E. Ezeribe, A.C. Fahey, K. Falcone, A. Farnese, C. Farzan, Y. Felix, J. Carneiro Da Silva, M.F. Fernandez-Martinez, E. Fernandez Menendez, P. Ferraro, F. Fields, L. Filthaut, F. Fiorentini, A. Fitzpatrick, R.S. Flanagan, W. Fleming, B. Flight, R. Forero, D.V. Fowler, J. Fox, W. Franc, J. Francis, K. Franco, D. Freeman, J. Freestone, J. Fried, J. Friedland, A. Fuess, S. Furic, I. Furmanski, A.P. Gabrielli, A. Gago, A. Gallagher, H. Gallas, A. Gallego-Ros, A. Gallice, N. Galymov, V. Gamberini, E. Gamble, T. Gandhi, R. Gandrajula, R. Gao, F. Gao, S. Garcia-Gamez, D. García-Peris, M.Á. Gardiner, S. Gastler, D. Ge, G. Gelli, B. Gendotti, A. Gent, S. Ghorbani-Moghaddam, Z. Gibin, D. Gil-Botella, I. Gilligan, S. Girerd, C. Giri, A.K. Gnani, D. Gogota, O. Gold, M. Gollapinni, S. Gollwitzer, K. Gomes, R.A. Gomez Bermeo, L.V. Gomez Fajardo, L.S. Gonnella, F. Gonzalez-Cuevas, J.A. Gonzalez-Diaz, D. Gonzalez-Lopez, M. Goodman, M.C. Goodwin, O. Goswami, S. Gotti, C. Goudzovski, E. Grace, C. Graham, M. Gran, R. Granados, E. Granger, P. Grant, A. Grant, C. Gratieri, D. Green, P. Greenler, L. Greer, J. Griffith, W.C. Groh, M. Grudzinski, J. Grzelak, K. Gu, W. Guarino, V. Guenette, R. Guerard, E. Guerzoni, M. Guglielmi, A. Guo, B. Guthikonda, K.K. Gutierrez, R. Guzowski, P. Guzzo, M.M. Gwon, S. Habig, A. Hadavand, H. Haenni, R. Hahn, A. Haiston, J. Hamacher-Baumann, P. Hamernik, T. Hamilton, P. Han, J. Harris, D.A. Hartnell, J. Harton, J. Hasegawa, T. Hasnip, C. Hatcher, R. Hatfield, K.W. Hatzikoutelis, A. Hayes, C. Hazen, E. Heavey, A. Heeger, K.M. Heise, J. Hennessy, K. Henry, S. Hernandez Morquecho, M.A. Herner, K. Hertel, L. Hewes, J. Higuera, A. Hill, T. Hillier, S.J. Himmel, A. Hoff, J. Hohl, C. Holin, A. Hoppe, E. Horton-Smith, G.A. Hostert, M. Hourlier, A. Howard, B. Howell, R. Huang, J. Huang, J. Hugon, J. Iles, G. Ilic, N. Iliescu, A.M. Illingworth, R. Ingratta, G. Ioannisian, A. Isenhower, L. Itay, R. Izmaylov, A. Jackson, S. Jain, V. James, E. Jargowsky, B. Jediny, F. Jena, D. Jeong, Y.S. Jesús-Valls, C. Ji, X. Jiang, L. Jiménez, S. Jipa, A. Johnson, R. Johnston, N. Jones, B. Jones, S.B. Judah, M. Jung, C.K. Junk, T. Jwa, Y. Kabirnezhad, M. Kaboth, A. Kadenko, I. Kakorin, I. Kamiya, F. Kaneshige, N. Karagiorgi, G. Karaman, G. Karcher, A. Karolak, M. Karyotakis, Y. Kasai, S. Kasetti, S.P. Kashur, L. Kazaryan, N. Kearns, E. Keener, P. Kelly, K.J. Kemp, E. Kemularia, O. Ketchum, W. Kettell, S.H. Khabibullin, M. Khotjantsev, A. Khvedelidze, A. Kim, D. King, B. Kirby, B. Kirby, M. Klein, J. Koehler, K. Koerner, L.W. Kohn, S. Koller, P.P. Kolupaeva, L. Kordosky, M. Kosc, T. Kose, U. Kostelecký, V.A. Kothekar, K. Krennrich, F. Kreslo, I. Kudenko, Y. Kudryavtsev, V.A. Kulagin, S. Kumar, J. Kumar, P. Kumar, R. Kunze, P. Kurita, N. Kuruppu, C. Kus, V. Kutter, T. Lambert, A. Land, B. Lande, K. Lane, C.E. Lang, K. Langford, T. Larkin, J. Lasorak, P. Last, D. Lastoria, C. Laundrie, A. Laurenti, G. Lawrence, A. Lazanu, I. Lazur, R. Le, T. Leardini, S. Learned, J. Lebrun, P. Lecompte, T. Lehmann Miotto, G. Lehnert, R. Leigui De Oliveira, M.A. Leitner, M. Li, L. Li, S.W. Li, T. Li, Y. Liao, H. Lin, C.S. Lin, Q. Lin, S. Lister, A. Littlejohn, B.R. Liu, J. Lockwitz, S. Loew, T. Lokajicek, M. Lomidze, I. Long, K. Loo, K. Lorca, D. Lord, T. Losecco, J.M. Louis, W.C. Lu, X.-G. Luk, K.B. Luo, X. Lurkin, N. Lux, T. Luzio, V.P. Macfarlane, D. Machado, A.A. Machado, P. Macias, C.T. Macier, J.R. Maddalena, A. Madera, A. Madigan, P. Magill, S. Mahn, K. Maio, A. Major, A. Maloney, J.A. Mandrioli, G. Mandujano, R.C. Maneira, J. Manenti, L. Manly, S. Mann, A. Manolopoulos, K. Manrique Plata, M. Manyam, V.N. Manzanillas, L. Marchan, M. Marchionni, A. Marciano, W. Marfatia, D. Mariani, C. Maricic, J. Marie, R. Marinho, F. Marino, A.D. Marsden, D. Marshak, M. Marshall, C.M. Marshall, J. Marteau, J. Martin-Albo, J. Martinez, N. Martinez Caicedo, D.A. Martynenko, S. Mason, K. Mastbaum, A. Masud, M. Matsuno, S. Matthews, J. Mauger, C. Mauri, N. Mavrokoridis, K. Mawby, I. Mazza, R. Mazzacane, A. Mazzucato, E. McAskill, T. McCluskey, E. McConkey, N. McFarland, K.S. McGrew, C. McNab, A. Mefodiev, A. Mehta, P. Melas, P. Mena, O. Menary, S. Mendez, H. Méndez, D.P. Menegolli, A. Meng, G. Messier, M.D. Metcalf, W. Mettler, T. Mewes, M. Meyer, H. Miao, T. Michna, G. Miedema, T. Migenda, J. Mikola, V. Milincic, R. Miller, W. Mills, J. Milne, C. Mineev, O. Miranda, O.G. Miryala, S. Mishra, C.S. Mishra, S.R. Mislivec, A. Mladenov, D. Mocioiu, I. Moffat, K. Moggi, N. Mohanta, R. Mohayai, T.A. Mokhov, N. Molina, J. Molina Bueno, L. Montanari, A. Montanari, C. Montanari, D. Montagna, E. Montano Zetina, L.M. Moon, J. Mooney, M. Moor, A.F. Moreno, D. Morris, C. Mossey, C. Motuk, E. Moura, C.A. Mousseau, J. Mu, W. Mualem, L. Mueller, J. Muether, M. Mufson, S. Muheim, F. Muir, A. Mulhearn, M. Munford, D. Muramatsu, H. Murphy, S. Musser, J. Nachtman, J. Nagu, S. Nalbandyan, M. Nandakumar, R. Naples, D. Narita, S. Navas-Nicolás, D. Navrer-Agasson, A. Nayak, N. Nebot-Guinot, M. Negishi, K. Nelson, J.K. Nesbit, J. Nessi, M. Newbold, D. Newcomer, M. Newhart, D. Newton, H. Niccolo, M. Nichol, R. Nicolas-Arnaldos, F. Nicoletta, M. Niner, E. Nishimura, K. Norman, A. Norrick, A. Northrop, R. Novella, P. Nowak, J.A. Oberling, M. Ochoa-Ricoux, J.P. Olivares Del Campo, A. Olivier, A. Olshevskiy, A. Onel, Y. Onishchuk, Y. Ott, J. Pagani, L. Pakvasa, S. Palacio, G. Palamara, O. Palestini, S. Paley, J.M. Pallavicini, M. Palomares, C. Palomino-Gallo, J.L. Pantic, E. Paolone, V. Papadimitriou, V. Papaleo, R. Papanestis, A. Paramesvaran, S. Parke, S. Parsa, Z. Parvu, M. Pascoli, S. Pasqualini, L. Pasternak, J. Pater, J. Patrick, C. Patrizii, L. Patterson, R.B. Patton, S.J. Patzak, T. Paudel, A. Paulos, B. Paulucci, L. Pavlovic, Z. Pawloski, G. Payne, D. Pec, V. Peeters, S.J.M. Pennacchio, E. Penzo, A. Peres, O.L.G. Perry, J. Pershey, D. Pessina, G. Petrillo, G. Petta, C. Petti, R. Piastra, F. Pickering, L. Pietropaolo, F. Plunkett, R. Poling, R. Pons, X. Poonthottathil, N. Poppi, F. Pordes, S. Porter, J. Potekhin, M. Potenza, R. Potukuchi, B.V.K.S. Pozimski, J. Pozzato, M. Prakash, S. Prakash, T. Prince, S. Pugnere, D. Qian, X. Queiroga Bazetto, M.C. Raaf, J.L. Radeka, V. Rademacker, J. Radics, B. Rafique, A. Raguzin, E. Rai, M. Rajaoalisoa, M. Rakhno, I. Rakotonandrasana, A. Rakotondravohitra, L. Ramachers, Y.A. Rameika, R. Ramirez Delgado, M.A. Ramson, B. Rappoldi, A. Raselli, G. Ratoff, P. Raut, S. Razakamiandra, R.F. Real, J.S. Rebel, B. Reggiani-Guzzo, M. Rehak, T. Reichenbacher, J. Reitzner, S.D. Rejeb Sfar, H. Renshaw, A. Rescia, S. Resnati, F. Reynolds, A. Riccio, C. Riccobene, G. Rice, L.C.J. Ricol, J. Rigamonti, A. Rigaut, Y. Rivera, D. Rochester, L. Roda, M. Rodrigues, P. Rodriguez Alonso, M.J. Rodriguez Bonilla, E. Rodriguez Rondon, J. Rosauro-Alcaraz, S. Rosenberg, M. Rosier, P. Roskovec, B. Rossella, M. Rout, J. Roy, P. Roy, S. Rubbia, A. Rubbia, C. Rubio, F.C. Russell, B. Ruterbories, D. Saakyan, R. Sacerdoti, S. Safford, T. Sahay, R. Sahu, N. Sala, P. Samios, N. Samoylov, O. Sanchez, M.C. Sanders, D.A. Sankey, D. Santana, S. Santos-Maldonado, M. Saoulidou, N. Sapienza, P. Sarasty, C. Sarcevic, I. Savage, G. Savinov, V. Scaramelli, A. Scarff, A. Scarpelli, A. Schaffer, T. Schellman, H. Schlabach, P. Schmitz, D. Scholberg, K. Schukraft, A. Segreto, E. Sensenig, J. Seong, I. Sergi, A. Sgalaberna, D. Shaevitz, M.H. Shafaq, S. Shamma, M. Sharankova, R. Sharma, H.R. Sharma, R. Shaw, T. Shepherd-Themistocleous, C. Shin, S. Shooltz, D. Shrock, R. Simard, L. Simon, F. Simos, N. Sinclair, J. Sinev, G. Singh, J. Singh, J. Singh, V. Sipos, R. Sippach, F.W. Sirri, G. Sitraka, A. Siyeon, K. Skarpaas, K. Smith, A. Smith, E. Smith, P. Smolik, J. Smy, M. Snider, E.L. Snopok, P. Soares Nunes, M. Sobel, H. Soderberg, M. Solano Salinas, C.J. Söldner-Rembold, S. Soleti, S. Solomey, N. Solovov, V. Sondheim, W.E. Sorel, M. Soto-Oton, J. Sousa, A. Soustruznik, K. Spagliardi, F. Spanu, M. Spitz, J. Spooner, N.J.C. Spurgeon, K. Staley, R. Stancari, M. Stanco, L. Stanley, R. Stein, R. Steiner, H.M. Stewart, J. Stillwell, B. Stock, J. Stocker, F. Stokes, T. Strait, M. Strauss, T. Striganov, S. Stuart, A. Suarez, J.G. Sullivan, H. Summers, D. Surdo, A. Susic, V. Suter, L. Sutera, C.M. Svoboda, R. Szczerbinska, B. Szelc, A.M. Talaga, R. Tanaka, H.A. Oregui, B.T. Tapper, A. Tariq, S. Tatar, E. Tayloe, R. Teklu, A.M. Tenti, M. Terao, K. Ternes, C.A. Terranova, F. Testera, G. Thea, A. Thompson, J.L. Thorn, C. Timm, S.C. Todd, J. Tonazzo, A. Torbunov, D. Torti, M. Tortola, M. Tortorici, F. Totani, D. Toups, M. Touramanis, C. Tosi, N. Travaglini, R. Trevor, J. Trilov, S. Trzaska, W.H. Tsai, Y.T. Tsamalaidze, Z. Tsang, K.V. Tsverava, N. Tufanli, S. Tull, C. Tyley, E. Tzanov, M. Uchida, M.A. Urheim, J. Usher, T. Uzunyan, S. Vagins, M.R. Vahle, P. Valdiviesso, G.A. Valencia, E. Valerio, P. Vallari, Z. Valle, J.W.F. Vallecorsa, S. Van Berg, R. Van De Water, R.G. Varanini, F. Vargas, D. Varner, G. Vasel, J. Vasina, S. Vasseur, G. Vaughan, N. Vaziri, K. Ventura, S. Verdugo, A. Vergani, S. Vermeulen, M.A. Verzocchi, M. Vicenzi, M. Vieira De Souza, H. Vignoli, C. Vilela, C. Viren, B. Vrba, T. Wachala, T. Waldron, A.V. Wallbank, M. Wang, H. Wang, J. Wang, L. Wang, M.H.L.S. Wang, Y. Wang, Y. Warburton, K. Warner, D. Wascko, M. Waters, D. Watson, A. Weatherly, P. Weber, A. Weber, M. Wei, H. Weinstein, A. Wenman, D. Wetstein, M. White, A. Whitehead, L.H. Whittington, D. Wilking, M.J. Wilkinson, C. Williams, Z. Wilson, F. Wilson, R.J. Wolcott, J. Wongjirad, T. Wood, A. Wood, K. Worcester, E. Worcester, M. Wret, C. Wu, W. Wu, W. Xiao, Y. Yandel, E. Yang, G. Yang, K. Yang, S. Yang, T. Yankelevich, A. Yershov, N. Yonehara, K. Young, T. Yu, B. Yu, H. Yu, J. Yuan, W. Zaki, R. Zalesak, J. Zambelli, L. Zamorano, B. Zani, A. Zazueta, L. Zeit, G. Zeller, G.P. Zennamo, J. Zeug, K. Zhang, C. Zhao, M. Zhivun, E. Zhu, G. Zilberman, P. Zimmerman, E.D. Zito, M. Zucchelli, S. Zuklin, J. Zutshi, V. Zwaska, R. DUNE Collaboration

Subjects
Physics::Instrumentation and Detectors, High Energy Physics::Experiment
Abstract

The Deep Underground Neutrino Experiment (DUNE) is an international, world-class experiment aimed at exploring fundamental questions about the universe that are at the forefront of astrophysics and particle physics research. DUNE will study questions pertaining to the preponderance of matter over antimatter in the early universe, the dynamics of supernovae, the subtleties of neutrino interaction physics, and a number of beyond the Standard Model topics accessible in a powerful neutrino beam. A critical component of the DUNE physics program involves the study of changes in a powerful beam of neutrinos, i.e., neutrino oscillations, as the neutrinos propagate a long distance. The experiment consists of a near detector, sited close to the source of the beam, and a far detector, sited along the beam at a large distance. This document, the DUNE Near Detector Conceptual Design Report (CDR), describes the design of the DUNE near detector and the science program that drives the design and technology choices. The goals and requirements underlying the design, along with projected performance are given. It serves as a starting point for a more detailed design that will be described in future documents. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Published
2021

7. Searching for solar KDAR with DUNE

Author

Abud, A. Abed Abi, B. Acciarri, R. Acero, M. A. Adames, M. R. Adamov, G. Adams, D. Adinolfi, M. Aduszkiewicz, A. and Aguilar, J. Ahmad, Z. Ahmed, J. Ali-Mohammadzadeh, B. and Alion, T. Allison, K. Monsalve, S. Alonso Alrashed, M. and Alt, C. Alton, A. Amedo, P. Anderson, J. and Andreopoulos, C. Andreotti, M. Andrews, M. P. Andrianala, F. and Andringa, S. Anfimov, N. Ankowski, A. Antoniassi, M. and Antonova, M. Antoshkin, A. Antusch, S. Aranda-Fernandez, A. and Ariga, A. Arnold, L. O. Arroyave, M. A. Asaadi, J. and Asquith, L. Aurisano, A. Aushev, V Autiero, D. and Ayala-Torres, M. Azfar, F. Back, A. Back, H. Back, J. J. and Backhouse, C. Baesso, P. Bagaturia, I Bagby, L. and Balashov, N. Balasubramanian, S. Baldi, P. Baller, B. and Bambah, B. Barao, F. Barenboim, G. Barker, G. J. and Barkhouse, W. Barnes, C. Barr, G. Barranco Monarca, J. and Barros, A. Barros, N. Barrow, J. L. Basharina-Freshville, A. and Bashyal, A. Basque, V Belchior, E. Battat, J. B. R. and Battisti, F. Bay, F. Bazo Alba, J. L. Beacom, J. F. and Bechetoille, E. Behera, B. Bellantoni, L. Bellettini, G. and Bellini, V Beltramello, O. Belver, D. Benekos, N. and Benitez Montiel, C. Neves, F. Bento Berger, J. Berkman, S. and Bernardini, P. Berner, R. M. Berns, H. Bertolucci, S. and Betancourt, M. Betancur Rodriguez, A. Bevan, A. Bezerra, T. J. C. Bhatnagar, V Bhattacharjee, M. Bhuller, S. and Bhuyan, B. Biagi, S. Bian, J. Biassoni, M. Biery, K. and Bilki, B. Bishai, M. Bitadze, A. Blake, A. Blaszczyk, F. D. M. Blazey, G. C. Blucher, E. Boissevain, J. and Bolognesi, S. Bolton, T. Bomben, L. Bonesini, M. and Bongrand, M. Bonini, F. Booth, A. Booth, C. Boran, F. and Bordoni, S. Borkum, A. Boschi, T. Bostan, N. Bour, P. Bourgeois, C. Boyd, S. B. Boyden, D. Bracinik, J. and Braga, D. Brailsford, D. Branca, A. Brandt, A. Bremer, J. Brew, C. Brianne, E. Brice, S. J. Brizzolari, C. and Bromberg, C. Brooijmans, G. Brooke, J. Bross, A. and Brunetti, G. Brunetti, M. Buchanan, N. Budd, H. Butorov, I Cagnoli, I Caiulo, D. Calabrese, R. Calafiura, P. and Calcutt, J. Calin, M. Calvez, S. Calvo, E. Caminata, A. and Campanelli, M. Cankocak, K. Caratelli, D. Carini, G. and Carlus, B. Carneiro, M. F. Carniti, P. Terrazas, I. Caro and Carranza, H. Carroll, T. Castano Forero, J. F. Castillo, A. and Castromonte, C. Catano-Mur, E. Cattadori, C. Cavalier, F. Cavanna, F. Centro, S. Cerati, G. Cervelli, A. and Cervera Villanueva, A. Chalifour, M. Chappell, A. and Chardonnet, E. Charitonidis, N. Chatterjee, A. and Chattopadhyay, S. Chen, H. Chen, M. Chen, Y. Chen, Z. and Cheon, Y. Cherdack, D. Chi, C. Childress, S. and Chiriacescu, A. Chisnall, G. Cho, K. Choate, S. and Chokheli, D. Chong, P. S. Choubey, S. Christensen, A. and Christian, D. Christodoulou, G. Chukanov, A. Chung, M. and Church, E. Cicero, V Clarke, P. Coan, T. E. Cocco, A. G. and Coelho, J. A. B. Conley, E. Conley, R. Conrad, J. M. and Convery, M. Copello, S. Corwin, L. Valentim, R. and Cremaldi, L. Cremonesi, L. Crespo-Anadon, I, J. Crisler, M. and Cristaldo, E. Cross, R. Cudd, A. Cuesta, C. Cui, Y. and Cussans, D. Dalager, O. da Motta, H. Peres, L. Da Silva and David, C. David, Q. Davies, G. S. Davini, S. Dawson, J. De, K. Debbins, P. De Bonis, I Decowski, M. P. de Gouvea, A. De Holanda, P. C. Astiz, I. L. De Icaza Deisting, A. De Jong, P. Delbart, A. Delepine, D. Delgado, M. and Dell'Acqua, A. De Lurgio, P. de Mello Neto, J. R. T. DeMuth, D. M. Dennis, S. Densham, C. Deptuch, G. W. De Roeck, A. and De Romeri, V De Souza, G. Devi, R. Dharmapalan, R. and Dias, M. Diaz, F. Diaz, J. S. Di Domizio, S. Di Giulio, L. Ding, P. Di Noto, L. Distefano, C. Diurba, R. and Diwan, M. Djurcic, Z. Doering, D. Dolan, S. Dolek, F. and Dolinski, M. J. Domine, L. Douglas, D. Douillet, D. and Drake, G. Drielsma, F. Duarte, L. Duchesneau, D. Duffy, K. Dunne, P. Durkin, T. Duyang, H. Dvornikov, O. and Dwyer, D. A. Dyshkant, A. S. Eads, M. Earle, A. Edmunds, D. Eisch, J. Emberger, L. Emery, S. Ereditato, A. and Erjavec, T. Escobar, C. O. Eurin, G. Evans, J. J. Ewart, E. Ezeribe, A. C. Fahey, K. Falcone, A. Fani, M. and Farnese, C. Farzan, Y. Fedoseev, D. Felix, J. Feng, Y. and Fernandez-Martinez, E. Fernandez Menendez, P. Fernandez Morales, M. Ferraro, F. Fields, L. Filip, P. Filthaut, F. Fiorentini, A. Fiorini, M. Fitzpatrick, R. S. and Flanagan, W. Fleming, B. Flight, R. Forero, V, D. and Fowler, J. Fox, W. Franc, J. Francis, K. Franco, D. and Freeman, J. Freestone, J. Fried, J. Friedland, A. and Robayo, F. Fuentes Fuess, S. Furic, I. K. Furmanski, A. P. and Gabrielli, A. Gago, A. Gallagher, H. Gallas, A. and Gallego-Ros, A. Gallice, N. Galymov, V Gamberini, E. and Gamble, T. Ganacim, F. Gandhi, R. Gandrajula, R. Gao, F. and Gao, S. Garcia, A. C. B. Garcia-Gamez, D. Garcia-Peris, A. Gardiner, S. Gastler, D. Gauvreau, J. Ge, G. and Gelli, B. Gendotti, A. Gent, S. Ghorbani-Moghaddam, Z. and Giammaria, P. Giammaria, T. Gibin, D. Gil-Botella, I and Gilligan, S. Girerd, C. 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Khotjantsev, A. Khvedelidze, A. Kim, D. and King, B. Kirby, B. Kirby, M. Klein, J. Koehler, K. and Koerner, L. W. Kohn, S. Koller, P. P. Kolupaeva, L. and Korablev, D. Kordosky, M. Kosc, T. Kose, U. Kostelecky, V. A. Kothekar, K. Krennrich, F. Kreslo, I Kropp, W. and Kudenko, Y. Kudryavtsev, V. A. Kulagin, S. Kumar, J. and Kumar, P. Kunze, P. Kuruppu, C. Kus, V Kutter, T. and Kvasnicka, J. Kwak, D. Lambert, A. Land, B. J. Lande, K. and Lane, C. E. Lang, K. Langford, T. Langstaff, M. and Larkin, J. Lasorak, P. Last, D. Lastoria, C. Laundrie, A. Laurenti, G. Lawrence, A. Lazanu, I LaZur, R. and Lazzaroni, M. Le, T. Leardini, S. Learned, J. LeBrun, P. and LeCompte, T. Lee, C. Lee, S. Y. Miotto, G. Lehmann and Lehnert, R. de Oliveira, M. A. Leigui Leitner, M. Lepin, L. M. Li, L. Li, S. W. Li, T. Li, Y. Liao, H. Lin, C. S. Lin, Q. Lin, S. Ling, J. Lister, A. and Littlejohn, B. R. Liu, J. Lockwitz, S. Loew, T. and Lokajicek, M. Lomidze, I Long, K. Loo, K. Lord, T. and LoSecco, J. M. Louis, W. C. Lu, X-G Luk, K. B. Luo, X. and Luppi, E. Lurkin, N. Lux, T. Luzio, V. P. and MacFarlane, D. Machado, A. A. Machado, P. Macias, C. T. and Macier, J. R. Maddalena, A. Madera, A. Madigan, P. and Magill, S. Mahn, K. Maio, A. Major, A. Maloney, J. A. and Mandrioli, G. Mandujano, R. C. Maneira, J. Manenti, L. and Manly, S. Mann, A. Manolopoulos, K. Plata, M. Manrique and Manyam, V. N. Manzanillas, L. Marchan, M. Marchionni, A. and Marciano, W. Marfatia, D. Mariani, C. Maricic, J. and Marie, R. Marinho, F. Marino, A. D. Marsden, D. Marshak, M. Marshall, C. M. Marshall, J. Marteau, J. Martin-Albo, J. Martinez, N. Caicedo, D. A. Martinez Martynenko, S. and Mascagna, V Mason, K. Mastbaum, A. Masud, M. Matichard, F. Matsuno, S. Matthews, J. Mauger, C. Mauri, N. and Mavrokoridis, K. Mawby, I Mazza, R. Mazzacane, A. and Mazzucato, E. McAskill, T. McCluskey, E. McConkey, N. and McFarland, K. S. McGrew, C. McNab, A. Mefodiev, A. and Mehta, P. Melas, P. Mena, O. Menary, S. Mendez, H. and Mendez, P. Menegolli, A. Meng, G. Messier, M. D. and Metcalf, W. Mettler, T. Mewes, M. Meyer, H. Miao, T. and Michna, G. Miedema, T. Mikola, V Milincic, R. Miller, G. and Miller, W. Mills, J. Milne, C. Mineev, O. Miranda, O. G. Miryala, S. Mishra, C. S. Mishra, S. R. Mislivec, A. Mladenov, D. Mocioiu, I Moffat, K. Moggi, N. and Mohanta, R. Mohayai, T. A. Mokhov, N. Molina, J. Bueno, L. Molina Montagna, E. Montanari, A. Montanari, C. and Montanari, D. Zetina, L. M. Montano Moon, J. Moon, S. H. and Mooney, M. Moor, A. F. Moreno, D. Morris, C. Mossey, C. and Motuk, E. Moura, C. A. Mousseau, J. Mouster, G. Mu, W. Mualem, L. Mueller, J. Muether, M. Mufson, S. and Muheim, F. Muir, A. Mulhearn, M. Munford, D. Muramatsu, H. Murphy, S. Musser, J. Nachtman, J. Nagu, S. and Nalbandyan, M. Nandakumar, R. Naples, D. Narita, S. and Nath, A. Navas-Nicolas, D. Navrer-Agasson, A. Nayak, N. and Nebot-Guinot, M. Negishi, K. Nelson, J. K. Nesbit, J. and Nessi, M. Newbold, D. Newcomer, M. Newhart, D. Newton, H. Nichol, R. Nicolas-Arnaldos, F. Niner, E. Nishimura, K. Norman, A. Norrick, A. Northrop, R. Novella, P. and Nowak, J. A. Oberling, M. Ochoa-Ricoux, J. P. Del Campo, A. Olivares Olivier, A. Olshevskiy, A. Onel, Y. Onishchuk, Y. Ott, J. Pagani, L. Pakvasa, S. Palacio, G. and Palamara, O. Palestini, S. Paley, J. M. Pallavicini, M. and Palomares, C. Palomino-Gallo, J. L. Vazquez, W. Panduro and Pantic, E. Paolone, V Papadimitriou, V Papaleo, R. and Papanestis, A. Paramesvaran, S. Parke, S. Parozzi, E. and Parsa, Z. Parvu, M. Pascoli, S. Pasqualini, L. and Pasternak, J. Pater, J. Patrick, C. Patrizii, L. and Patterson, R. B. Patton, S. J. Patzak, T. Paudel, A. and Paulos, B. Paulucci, L. Pavlovic, Z. Pawloski, G. Payne, D. Pec, V Peeters, S. J. M. Pennacchio, E. Penzo, A. and Peres, O. L. G. Perry, J. Pershey, D. Pessina, G. and Petrillo, G. Petta, C. Petti, R. Pia, V Piastra, F. and Pickering, L. Pietropaolo, F. Plunkett, R. Poling, R. and Pons, X. Poonthottathil, N. Poppi, F. Pordes, S. Porter, J. Potekhin, M. Potenza, R. Potukuchi, B. V. K. S. and Pozimski, J. Pozzato, M. Prakash, S. Prakash, T. Prest, M. Prince, S. Psihas, F. Pugnere, D. Qian, X. and Bazetto, M. C. Queiroga Raaf, J. L. Radeka, V Rademacker, J. and Radics, B. Rafique, A. Raguzin, E. Rai, M. and Rajaoalisoa, M. Rakhno, I Rakotonandrasana, A. and Rakotondravohitra, L. Ramachers, Y. A. Rameika, R. Delgado, M. A. Ramirez Ramson, B. Rappoldi, A. Raselli, G. and Ratoff, P. Raut, S. Razakamiandra, R. F. Rea, E. Real, J. S. Rebel, B. Reggiani-Guzzo, M. Rehak, T. and Reichenbacher, J. Reitzner, S. D. Sfar, H. Rejeb Renshaw, A. and Rescia, S. Resnati, F. Reynolds, A. Ribas, M. and Riboldi, S. Riccio, C. Riccobene, G. Rice, L. C. J. and Ricol, J. Rigamonti, A. Rigaut, Y. Rivera, D. Robert, A. and Rochester, L. Roda, M. Rodrigues, P. Alonso, M. J. Rodriguez Rodriguez Bonilla, E. Rondon, J. Rodriguez and Rosauro-Alcaraz, S. Rosenberg, M. Rosier, P. Roskovec, B. and Rossella, M. Rossi, M. Rott, C. Rout, J. Roy, P. and Roy, S. Rubbia, A. Rubbia, C. Rubio, F. C. Russell, B. and Ruterbories, D. Rybnikov, A. Saa-Hernandez, A. Saakyan, R. Sacerdoti, S. Safford, T. Sahu, N. Sala, P. and Samios, N. Samoylov, O. Sanchez, M. C. Sandberg, V and Sanders, D. A. Sankey, D. Santana, S. Santos-Maldonado, M. and Saoulidou, N. Sapienza, P. Sarasty, C. Sarcevic, I and Savage, G. Savinov, V Scaramelli, A. Scarff, A. and Scarpelli, A. Schaffer, T. Schellman, H. Schifano, S. and Schlabach, P. Schmitz, D. Scholberg, K. Schukraft, A. and Segreto, E. Selyunin, A. Senise, C. R. Sensenig, J. and Seoane, M. Seong, I Sergi, A. Sgalaberna, D. Shaevitz, M. H. Shafaq, S. Shamma, M. Sharankova, R. Sharma, H. R. and Sharma, R. Kumar, R. Shaw, T. Shepherd-Themistocleous, C. Sheshukov, A. Shin, S. Shoemaker, I Shooltz, D. and Shrock, R. Siegel, H. Simard, L. Simon, F. Sinclair, J. and Sinev, G. Singh, J. Singh, J. Singh, L. Singh, V and Sipos, R. Sippach, F. W. Sirri, G. Sitraka, A. Siyeon, K. Skarpaas, K. Smith, A. Smith, E. Smith, P. and Smolik, J. Smy, M. Snider, E. L. Snopok, P. and Snowden-Ifft, D. Nunes, M. Soares Sobel, H. Soderberg, M. and Sokolov, S. Solano Salinas, C. J. Soldner-Rembold, S. and Soleti, S. R. Solomey, N. Solovov, V Sondheim, W. E. and Sorel, M. Sotnikov, A. Soto-Oton, J. Sousa, A. and Soustruznik, K. Spagliardi, F. Spanu, M. Spitz, J. and Spooner, N. J. C. Spurgeon, K. Staley, R. Stancari, M. and Stanco, L. Stanley, R. Stein, R. Steiner, H. M. Lisboa, A. F. Steklain Stewart, J. Stillwell, B. Stock, J. and Stocker, F. Stokes, T. Strait, M. Strauss, T. Striganov, S. Stuart, A. Suarez, J. G. Sullivan, H. Summers, D. and Surdo, A. Susic, V Suter, L. Sutera, C. M. Svoboda, R. and Szczerbinska, B. Szelc, A. M. Tanaka, H. A. Oregui, B. Tapia Tapper, A. Tariq, S. Tatar, E. Tayloe, R. and Teklu, A. M. Tenti, M. Terao, K. Ternes, C. A. and Terranova, F. Testera, G. Thakore, T. Thea, A. Thompson, J. L. Thorn, C. Timm, S. C. Tishchenko, V Todd, J. and Tomassetti, L. Tonazzo, A. Torbunov, D. Torti, M. and Tortola, M. Tortorici, F. Tosi, N. Totani, D. Toups, M. and Touramanis, C. Travaglini, R. Trevor, J. Trilov, S. and Tripathi, A. Trzaska, W. H. Tsai, Y. Tsai, Y-T and Tsamalaidze, Z. Tsang, V, K. Tsverava, N. Tufanli, S. and Tull, C. Tyley, E. Tzanov, M. Uboldi, L. Uchida, M. A. and Urheim, J. Usher, T. Uzunyan, S. Vagins, M. R. and Vahle, P. Valdiviesso, G. A. Valencia, E. Vallari, Z. and Vallazza, E. Valle, J. W. F. Vallecorsa, S. Van Berg, R. and Van de Water, R. G. Varanini, F. Vargas, D. Varner, G. and Vasel, J. Vasina, S. Vasseur, G. Vaughan, N. Vaziri, K. and Ventura, S. Verdugo, A. Vergani, S. Vermeulen, M. A. and Verzocchi, M. Vicenzi, M. de Souza, H. Vieira Vignoli, C. and Vilela, C. Viren, B. Vrba, T. Wachala, T. Waldron, V, A. Wallbank, M. Wallis, C. Wang, H. Wang, J. and Wang, L. Wang, M. H. L. S. Wang, Y. Wang, Y. Warburton, K. Warner, D. Wascko, M. O. Waters, D. Watson, A. and Weatherly, P. Weber, A. Weber, M. Wei, H. Weinstein, A. and Wenman, D. Wetstein, M. White, A. Whitehead, L. H. and Whittington, D. Wilking, M. J. Wilkinson, C. Williams, Z. and Wilson, F. Wilson, R. J. Wisniewski, W. Wolcott, J. and Wongjirad, T. Wood, A. Wood, K. Worcester, E. Worcester, M. Wret, C. Wu, W. Wu, W. Xiao, Y. Xie, F. and Yandel, E. Yang, G. Yang, K. Yang, S. Yang, T. and Yankelevich, A. Yershov, N. Yonehara, K. Young, T. Yu, B. Yu, H. Yu, H. Yu, J. Yuan, W. Zaki, R. and Zalesak, J. Zambelli, L. Zamorano, B. Zani, A. Zazueta, L. Zeller, G. P. Zennamo, J. Zeug, K. Zhang, C. and Zhao, M. Zhivun, E. Zhu, G. Zilberman, P. Zimmerman, E. D. Zito, M. Zucchelli, S. Zuklin, J. Zutshi, V and Zwaska, R. DUNE Collaboration

Subjects
High Energy Physics::Experiment
Abstract

The observation of 236 MeV muon neutrinos from kaon-decay-at-rest (KDAR) originating in the core of the Sun would provide a unique signature of dark matter annihilation. Since excellent angle and energy reconstruction are necessary to detect this monoenergetic, directional neutrino flux, DUNE with its vast volume and reconstruction capabilities, is a promising candidate for a KDAR neutrino search. In this work, we evaluate the proposed KDAR neutrino search strategies by realistically modeling both neutrino-nucleus interactions and the response of DUNE. We find that, although reconstruction of the neutrino energy and direction is difficult with current techniques in the relevant energy range, the superb energy resolution, angular resolution, and particle identification offered by DUNE can still permit great signal/background discrimination. Moreover, there are non-standard scenarios in which searches at DUNE for KDAR in the Sun can probe dark matter interactions.

Published
2021

8. Creep-Fatigue Interaction in the AISI H11 Tool Steel

Author

Lorenzo Donati, Barbara Reggiani, Jie Zhou, Marco D’Ascenzo, Luca Tomesani, A. Erman Tekkaya, Nooman Ben Khalifa, B. Reggiani, M. D’Ascenzo, L. Donati, J. Zhou, and L. Tomesani

Subjects
CREEP-FATIGUE INTERACTION, AISI H11 TOOL STEEL, EXTRUSION DIE, TOOL LIFETIME, business.product_category, Materials science, Mechanical Engineering, Metallurgy, Creep fatigue, engineering.material, Dwell time, Mandrel, Creep, Mechanics of Materials, Tool steel, engineering, Die (manufacturing), Cyclic loading, General Materials Science, Extrusion, Composite material, business
Abstract

The effect of process parameters on the creep-fatigue behavior of a hot-work tool steel for aluminum extrusion die was investigated through a technological test in which the specimen geometry resembled the mandrel of a hollow extrusion die. Tests were performed on a Gleeble thermomechanical simulator by heating the specimen using joule’s effect and by applying cyclic loading up to 6.30 h or till specimen failure. Displacements during the tests at 380, 490, 540 and 580°C and under the average stresses of 400, 600 and 800 MPa were determined. A dwell time of 3 min was introduced during each of the tests to understand the creep behavior. The results showed that the test could indeed physically simulate the cyclic loading on the hollow die during extrusion and reveal all the mechanisms of creep-fatigue interaction.

Published
2009
Full Text
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9. The optimization of parts within complex assemblies

Author

Francesca Cosmi, Barbara Reggiani, Cosmi, Francesca, and B., Reggiani

Subjects
Mathematical optimization, Engineering, Optimization problem, Design, blow-machinery assembly, business.industry, design, multi-goal optimization, carry-mould, finite element modelling, Mechanical Engineering, Probabilistic-based design optimization, Topology optimization, FE modelling, Engineering optimization, Robustness (computer science), Test functions for optimization, Boundary value problem, Minification, business
Abstract

Optimization problems are frequently not straightforward. This is due, among other reasons, to the predefined design constraints and simultaneous target goals that have to be satisfied. In addition, uncontrollable variations can influence the robustness and stability of the design. Moreover, engineers often have to optimize mechanical components that are part of complex assemblies, in which it is difficult to extrapolate and define the boundary conditions to be applied for component optimization. The aim of this work is to present a step-procedure for the multi-goal optimization of components that are integrated in multi-part engineering systems. In order to illustrate the method, optimization of a carry-mould, part of a blowing machinery composed by several components, was used as a test case. Minimization of the carry-mould moment of inertia and the global mass were imposed as the target goals of the optimization process, while the maximum allowable displacement was set for a number of control points. The proposed procedure was capable of a time efficient and cost saving extensive investigation of the optimization design space.

Published
2010

10. Multi-goal optimization of a carry-mould

Author

Reggiani, Barbara, Cosmi, Francesca, B., Reggiani, and Cosmi, Francesca

Subjects
Design, blow-machinery assembly, multi-goal optimization, carry-mould, FE modelling, design
Abstract

A common engineering task is the optimization of components that are part of multi-body assemblies, in which it is difficult to extrapolate and define the boundary conditions to be applied for the component optimization. This work presents a procedure for multi-goal optimization of components that are integrated in multipart engineering systems. The efficiency of the procedure is illustrated by means of a test case, a carry-mould that is part of a multi-component blowing machinery. Target goals of the optimization process were the minimization of moment of inertia and of global mass and the maximum allowable displacement in a number of control points.

Published
2009

13. From lead management to implanted patient management: systematic review and meta-analysis of the last 15 years of experience in lead extraction.

Author

Diemberger I, Mazzotti A, Giulia MB, Cristian M, Matteo M, Letizia ZM, Reggiani B, Battistini P, and Boriani G

Subjects
Humans, Cardiac Surgical Procedures adverse effects, Cardiac Surgical Procedures instrumentation, Cardiac Surgical Procedures methods, Pacemaker, Artificial
Abstract

Percutaneous lead extraction is considered a safe and effective procedure, although published results derive primarily from cohort studies. The authors performed a systematic review and meta-analysis of the last 15 years' experience in this field, to give an objective evaluation of the efficacy and safety of this procedure. Moreover, the subsequent metaregression analysis enabled the identification of the main factors influencing these results: patient age, presence of leads in situ for more than 1 year, presence of device infection and use of laser sheath. These findings are significant in order to improve our extraction approach, data reporting and future research.

Published
2013
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14. Finite-element modeling of bones from CT data: sensitivity to geometry and material uncertainties.

Author

Taddei F, Martelli S, Reggiani B, Cristofolini L, and Viceconti M

Subjects
Computer Simulation, Elasticity, Finite Element Analysis, Reproducibility of Results, Sensitivity and Specificity, Stress, Mechanical, Weight-Bearing physiology, Femur diagnostic imaging, Femur physiology, Models, Biological, Radiographic Image Interpretation, Computer-Assisted methods, Tomography, X-Ray Computed methods
Abstract

The aim of this paper is to analyze how the uncertainties in modelling the geometry and the material properties of a human bone affect the predictions of a finite-element model derived from computed tomography (CT) data. A sensitivity analysis, based on a Monte Carlo method, was performed using three femur models generated from in vivo CT datasets, each subjected to two different loading conditions. The geometry, the density and the mechanical properties of the bone tissue were considered as random input variables. Finite-element results typically used in biomechanics research were considered as statistical output variables, and their sensitivity to the inputs variability assessed. The results showed that it is not possible to define a priori the influence of the errors related to the geometry definition process and to the material assignment process on the finite-element analysis results. The errors in the geometric representation of the bone are always the dominant variables for the stresses, as was expected. However, for all the variables, the results seemed to be dependent on the loading condition and to vary from subject to subject. The most interesting result is, however, that using the proposed method to build a finite-element model of a femur from a CT dataset of the quality typically achievable in the clinical practice, the coefficients of variation of the output variables never exceed the 9%. The presented method is hence robust enough to be used for investigating the mechanical behavior of bones with subject-specific finite-element models derived from CT data taken in vivo.

Published
2006
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