Search

Your search keyword '"Khezri, Mani"' showing total 20 results
Start Over Author "Khezri, Mani"
20 results on '"Khezri, Mani"'

1. Recent Research on Built-Up Cold-Formed Steel Structures

Author

Rasmussen, Kim J. R., Khezri, Mani, Zhang, Hao, Schafer, Benjamin W., di Prisco, Marco, Series Editor, Chen, Sheng-Hong, Series Editor, Vayas, Ioannis, Series Editor, Kumar Shukla, Sanjay, Series Editor, Sharma, Anuj, Series Editor, Kumar, Nagesh, Series Editor, Wang, Chien Ming, Series Editor, Cui, Zhen-Dong, Series Editor, Ha-Minh, Cuong, editor, Pham, Cao Hung, editor, Vu, Hanh T. H., editor, and Huynh, Dat Vu Khoa, editor

Published
2024
Full Text
View/download PDF

11. Hardness Distribution and Defect Formation in Aluminium Alloys Fabricated via Additive Friction Stir Deposition (AFSD).

Author

Yakubov, Vladislav, Ostergaard, Halsey, Bhagavath, Shishira, Chu Lun Alex Leung, Hughes, James, Yasa, Evren, Khezri, Mani, Löschke, Sandra K., Qing Li, and Paradowska, Anna M.

Subjects
ALUMINUM alloys, FRICTION stir processing, THREE-dimensional printing, RESIDUAL stresses, MICROSCOPY
Abstract

Additive friction stir deposition (AFSD) is an emerging solid-state additive manufacturing technique where material is deposited layer-by-layer. Unlike fusion-based additive manufacturing processes, AFSD relies on a rotating tool to extrude and bond feedstock material through frictional heat and pressure, keeping the material below its melting point to eliminate fusion-related defects. It is suitable for large structure fabrication due to its high deposition rate. However, AFSD is still in development, with questions concerning hardness variation along the build height, defect formation, and residual stress distribution. In this research, an AFSDmanufactured structure is examined using optical microscopy, Vickers hardness testing, and neutron diffraction. Optical microscopy reveals defects at first layer and substrate interface as well as deposit edges, while hardness testing indicates deposit hardness decreases from final layer to first layer. Neutron diffraction shows tensile residual stress near the fusion zone in the substrate with compressive residual stress in majority of deposit. [ABSTRACT FROM AUTHOR]

Published
2024

18. Generalised RKP-FSM and its application in analysis of thin plates with abrupt rigidity changes and generally laminated composite plates

Author

Khezri, Mani

Subjects
Finite strip method, Free flexural vibration, Laminated composite plate, Stepped plate, Bending, Buckling, Thick plate, Three-dimensional elasticity, Thin plate, Generalised RKP-FSM, Material discontinuity, State space method
Abstract

A finite strip method (FSM) utilising the meshfree generalised reproducing kernel particle method (RKPM) is developed for the numerical analysis of plates and of laminated plate assemblies. In this innovative approach, the spline functions in the conventional spline finite strip method (SFSM) are replaced with generalised RKPM 1-D shape functions in the longitudinal direction, while the transverse polynomial functions which are used in conventional formulations are retained. The structure of the generalised RKPM makes it a suitable tool for dealing with derivative-type essential boundary conditions and its introduction in the finite strip method is beneficial for solving bending, buckling and vibration problems for thin plates in which a number of the essential boundary conditions can include the first derivatives of the displacement function. In this thesis, the formulation for the generalised RKP-FSM is derived for flexure, buckling, and free vibration analyses, and its accuracy and convergence are elucidated through a series of numerical studies. Moreover, by modifying the concept of the augmented corrected collocation method, a new feature is added to the conventional SFSM and the generalised RKP-FSM which allows for the exact treatment of rigidity discontinuities in plate analysis. This provides a versatile and powerful computational capability which facilities the analysis of problems including plate structures with abrupt thickness changes of its component plates. This thesis also presents a novel numerical procedure based on the state space approach for the static analysis of thick and laminated composite plates using the proposed RKP-FSM. A semi-analytical technique is presented for the static analysis of thick and generally laminated composite plates by combining the RKP-FSM with the state space method. The present formulation is based on the application of the RKP-FSM in the plane of the problem to approximate the in-plane variations of displacement and stress components while the state space method is adopted for the prediction of stress and displacement components in the thickness direction.

Published
2014
Full Text
View/download PDF

20. Generalised RKP-FSM and its application in analysis of thin plates with abrupt rigidity changes and generally laminated composite plates

Author

Bradford, Mark A., Civil & Environmental Engineering, Faculty of Engineering, UNSW, Khezri, Mani, Civil & Environmental Engineering, Faculty of Engineering, UNSW, Bradford, Mark A., Civil & Environmental Engineering, Faculty of Engineering, UNSW, and Khezri, Mani, Civil & Environmental Engineering, Faculty of Engineering, UNSW

Abstract

A finite strip method (FSM) utilising the meshfree generalised reproducing kernel particle method (RKPM) is developed for the numerical analysis of plates and of laminated plate assemblies. In this innovative approach, the spline functions in the conventional spline finite strip method (SFSM) are replaced with generalised RKPM 1-D shape functions in the longitudinal direction, while the transverse polynomial functions which are used in conventional formulations are retained. The structure of the generalised RKPM makes it a suitable tool for dealing with derivative-type essential boundary conditions and its introduction in the finite strip method is beneficial for solving bending, buckling and vibration problems for thin plates in which a number of the essential boundary conditions can include the first derivatives of the displacement function. In this thesis, the formulation for the generalised RKP-FSM is derived for flexure, buckling, and free vibration analyses, and its accuracy and convergence are elucidated through a series of numerical studies. Moreover, by modifying the concept of the augmented corrected collocation method, a new feature is added to the conventional SFSM and the generalised RKP-FSM which allows for the exact treatment of rigidity discontinuities in plate analysis. This provides a versatile and powerful computational capability which facilities the analysis of problems including plate structures with abrupt thickness changes of its component plates. This thesis also presents a novel numerical procedure based on the state space approach for the static analysis of thick and laminated composite plates using the proposed RKP-FSM. A semi-analytical technique is presented for the static analysis of thick and generally laminated composite plates by combining the RKP-FSM with the state space method. The present formulation is based on the application of the RKP-FSM in the plane of the problem to approximate the in-plane variations of displacement and s

Published
2014

Catalog

Books, media, physical & digital resources
See catalog results