The two-scale finite element computation for thermoelastic problem in periodic perforated domain
Feng Yongping, Cui Jun-Zhi, Mingxiang Deng, (1)广州大学数学与信息科学学院，广州 510006; (2)中国科学院数学与系统科学研究院，北京 100190 · Acta Physica Sinica · 2009
The problems of composite structures containing small periodic perforated configurations are often encountered in the development of composite materials. These structures often consist of material with very fine micro-structures and vary sharply within a very small periodic domain. The traditional simulation of these structures involving multi-scale is very difficult because of the requirement for a tremendous amount of computer memory and CPU running time. The two-scale formal asymptotic expansions of the increment of temperature and the displacement for the structure with small periodic perforated configuration of composite material are given. The two-scale finite element algorithm is described， and simple numerical results are evaluated by two-scale finite element computational method. The numerical results show that the basic configuration and the increment of temperature strongly affect local strains and local stresses inside basic cell. A new effective numerical method is presented for thermoelastic problem in a periodic perforated domain.