Extended multiscale finite element method for elasto-plastic analysis of 2D periodic lattice truss materials |
| |
Authors: | H W Zhang J K Wu Z D Fu |
| |
Affiliation: | 1. State Key Laboratory of Structural Analysis for Industrial Equipment, Department of Engineering Mechanics, Faculty of Vehicle Engineering and Mechanics, Dalian University of Technology, Dalian, 116024, People’s Republic of China
|
| |
Abstract: | An extended multiscale finite element method is developed for small-deformation elasto-plastic analysis of periodic truss
materials. The base functions constructed numerically are employed to establish the relationship between the macroscopic displacement
and the microscopic stress and strain. The unbalanced nodal forces in the micro-scale of unit cells are treated as the combined
effects of macroscopic equivalent forces and microscopic perturbed forces, in which macroscopic equivalent forces are used
to solve the macroscopic displacement field and microscopic perturbed forces are used to obtain the stress and strain in the
micro-scale to make sure the correctness of the results obtained by the downscale computation in the elastic-plastic problems.
Numerical examples are carried out and the results verify the validity and efficiency of the developed method by comparing
it with the conventional finite element method. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|