摘要
基于一般三维应力状态下等向硬化类弹塑性本构模型的隐式应力积分算法,推导了与隐式应力积分算法相一致的应力应变关系表达式.将该算法应用于中井的子负荷面本构关系模型,并提出了新的子负荷面状态量的发展规则.与传统的欧拉向前应力积分法计算结果及藤森粘土三轴模型试验结果比较表明,本文算法与传统方法计算精度一致的情况下,迭代收敛速度更快.
Based on the implicit stress integration algorithm for isotropic hardening elastoplastic constitutive models in general three-dimensional stresses, the expression of stress-strain relationship which is consistent to the implicit stress integration algorithm is deduced. The algorithm is applied to the Nakai′s model, and the new development rule of the state variable associated with the subloading surface is presented. Calculation results are compared with the results of the conventional forward stress integration algorithm and with the triaxial test results of Fujinomori Clay. It can be seen that the convergent speed of this algorithm is faster than that of the conventional method with the same accuracy.
出处
《水利水运工程学报》
CSCD
北大核心
2004年第3期24-27,共4页
Hydro-Science and Engineering
