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15 results on '"Mitukiewicz, Grzegorz"'

4. Suitability evaluation of pre-formed cruciform sample without thickness reduction for high strain values in the center of the specimen under different strains paths

Author

Mitukiewicz, Grzegorz, Leotoing, Lionel, Wang, Guan, Guines, Dominique, Goszczak, Jaroslaw, Batory, Damian, Łódź University of Technology, Laboratoire de Génie Civil et Génie Mécanique (LGCGM), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)

Subjects
Cruciform Sample, Ductile Damage Criterion, Biaxial Tensile Test Simulation, [SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph]
Abstract

In this study, the Finite Element (FE) simulation of an initially pre-deformed DC-5 steel cruciform specimen has been carried out and compared to experimental results. A new geometry of the sample with local reinforcements and without thickness reduction allows distribution of plastic deformation and gets high strains in its gauge region. The simulation is divided into two steps. The first one introduces initial deformation to the sample arms. For the second step, the calculated strain field is introduced as an initial pre-strain field before the application of loading along the two perpendicular arms of the cruciform specimen during the in-plane biaxial tensile test. The described numerical study expands the knowledge of material plastic flow using a ductile damage criterion under different biaxial tensile strain paths. The numerical and experimental results are in good agreement for different strain paths, from uniaxial to equibiaxial strain states.

Published
2023

10. The study of damping control in semi-active car suspension

Author

Goszczak, Jarosław, Mitukiewicz, Grzegorz, Radzymiński, Bartosz, Werner, Andrzej, Szydłowski, Tomasz, Batory, Damian, Goszczak, Jarosław, Mitukiewicz, Grzegorz, Radzymiński, Bartosz, Werner, Andrzej, Szydłowski, Tomasz, and Batory, Damian

Abstract

Paper discusses apparently opposing goal functions in terms of car’s comfort and handling. Short descriptions of passive, semi-active and active suspensions with their features are included. Thereafter, employing a two-mass quarter car model, an idea of damping control strategy in semi-active car suspension is presented. The results of performed simulation tests for various inputs are depicted and thoroughly discussed with comparison to classical passive suspension’s response. On the grounds of obtained results, conclusions are formulated. What is more, a layout of further work is outlined, with the aim of system’s response optimization in terms of comfort and handling features, as well as reliable validation of efficiency of proposed damping control strategy.

Published
2020

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