The structural damage of clay is depicted by the shear and compression damage variables, and the damage evolution equations are presented on the basis of accumulated plastic deviatoric strain. 在此基础上,根据硬化塑性理论和临界状态概念,提出了一个描述非饱和土应力应变特性的一般本构理论框架。
Investigations showed that one of the most important characteristics of pearlitic materials is the decrease of ratcheting rate, the plastic shakedown capability, and the memory and recovery of the accumulated plastic strain under asymmetrical stress cycles. 珠光体材料的重要特性之一是在非对称应力循环下循环蠕变速率的减缓并趋于塑性安定以及材料对循环蠕变史的记忆与恢复;
The accumulated damage model is viewed as the function of equivalent plastic strain, plastic volumetric strain and pressure. 积累损伤作为等效塑性应变、塑性体积应变和压力的函数。
The effect of damage to structure caused by accumulated plastic strain is modeled with a set of scalar variables introduced into the corresponding equations linking the structure degradation with the accumulated plastic strain. 在本构方程中引入一组适当的标量形式的硬化变量,从而将黏土结构损伤与累积塑性应变发展联系起来。
Accumulated Residual Plastic Strain of Solder Joints under Thermal Cycling 热循环过程中焊点残余应变的研究
It is shown that the properties of plastic flow of strain cycling are apparently different with that of asymmetrical stress cycling, the ratcheting of asymmetrical stress cycling at room and high temperature is decided by the evolution of plastic modulus and accumulated plastic strain. 研究表明,应变循环中塑性模量的演变规律明显不同于非对称应力循环,室温和高温下非对称应力循环中的棘轮效应由塑性模量和累积塑性应变的演变规律共同决定。
The discussion is focused on the relation of ratcheting to the plastic modulus and accumulated plastic strain. 研究中着重讨论了循环棘轮行为与塑性模量和累积塑性应变之间的关系。
The accumulated plastic strain under low-stress fatigue was much lower than that under high-stress fatigue. 断裂时,低应力疲劳比高应力的平均累积塑性应变小得多。