摘要
从基于小参数渐近展开和摄动方法的均匀化理论出发,给出了求解细观应力的数学表达式。通过有限元方法对三维编织复合材料的细观应力场进行数值模拟,并结合适当的强度准则对拉伸极限强度下单元的失效情况进行判断,得出材料强度的一种细观失效判据。通过该方法得到的应力计算结果与实验结论基本相符。
A homogenization method based on the perturbation theory is presented to deduce the mathematical expression of the micro-stress. The FEM method was used to simulate the micro-stress of three-dimensional braided composites. The proper criteria of strength were used to judge the failure of each element under the loading of the limited tensile stress. A kind of micro failure criterion of strength can be concluded. The calculation results of stress obtained by this method agree quite well with some conclusions of the tensile experiment.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2005年第6期139-143,共5页
Acta Materiae Compositae Sinica
基金
国家自然科学基金(50275074)
航空科学基金(01B52007)
关键词
均匀化方法
细观应力
单胞
编织复合材料
失效判据
homogenization method
micro-stress
unit cell
braided composites
failure criterion
