摘要
通过理论分析和数值算例研究了采用 L S- DYNA3D等非线性动力响应分析有限元程序于具有较大刚体转动的结构时 ,可能出现错误的应力和应变计算结果。主要原因是采用增量形式的应力修正时 ,其客观性被破坏。
The potential limitations of numerical procedures in computing the strain and stress of structures subjected to impact loading and their roots are investigated with analysis and numerical examples in this paper. Inaccurate stress and strain results of structures when large rotations are involved may be obtained using nonlinear dynamic codes, such as LS DYNA3D. No maintaining incremental stress update objectivity is main reasons. These deficiencies of the codes available should be improved.
出处
《计算力学学报》
CAS
CSCD
北大核心
2001年第4期473-477,共5页
Chinese Journal of Computational Mechanics
基金
山西省自然科学基金 ( 991 0 0 6 )
山西省留学归国人员基金资助项目
