摘要
对工程领域使用广泛的邓肯-张非线性本构模型进行了研究,总结了国内外的研究现状及理论成果,针对其无法判定因结压力降低时的加载情况,提出了相应的变形模量的计算方法,同时考虑中主应力、土体抗拉强度的影响对模型进行了修正。利用APDL编写程序实现了ANSYS的材料本构模型的二次开发,运用重启动方法实现单元应力修正后数据重写入数据库,通过试验模拟对比分析验证了模型的适用性。
Based on the present research situation and theoretical results, research is done on Duncan-Chang nonlinear elastic model, which is applied widely in engineering,. According to the fact that Duncan-Chang model can＇t judge the loading situation while con- solidation pressure decreases. The model is modified cosidering the effect of intermediate principal stress and tensile strength of soil. The secondary development of material constitutive model in ANSYS is accomplished by utilizing the APDL language. Then the restart method is used to modify element stress, the corrected data is database rewritten. A series of compliance tests verify the accuracy and applicability of the modified Duncan-Chang nonlinear elastic model embedded ANSYS.
出处
《中国农村水利水电》
北大核心
2010年第3期76-79,共4页
China Rural Water and Hydropower
关键词
邓肯-张模型
抗拉强度
中主应力
应力分析
Duncan-Chang nonlinear elastic model
tensile strength
intermediate principal stress
stress analysis
