摘要
根据ＨａｈｎＴｓａｉ非线性应力应变关系，用有限元方法对受拉伸载荷作用的含孔复合材料层板损伤演变进行了模拟计算，由非线性有限元方法得到的应力、应变以及最终载荷与以往线性分析方法得到的结果比较表明：考虑材料非线性可以提高计算精度；参数研究表明非线性系数的变化对正交各向异性板的影响较大，而对准各向同性板的影响较少．
A nonlinear finite element program in terms of the nonlinear shear stress shear strain relation proposed by Hahn and Tsai is used to simulate the progressive damage of laminated composites with a circulor hole subjected to remote tensile loading.Stress,strain and ultimate strength of laminates are analyzed by this program.Compared with the experimental data in earlier paper,the nonlinear approch is more accurate than the linear approach,especially for orthotropic laminate.The parametric study manifests that the variance of nonlinearity coefficient has more serious effect on orthotropic plate than on quasi isotropic plate.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
1998年第5期546-548,共3页
Journal of Beijing University of Aeronautics and Astronautics
基金
航空科学基金
关键词
非线性
复合材料
有限元
损伤力学
non linear
composite materials
finite elements
damage
