摘要
在Lagrange运动学描述的基础上,提出了一个普遍意义上的非局部效应本构关系的改造形式,它对每一个经过验证的本构都适用。这样处理既可以利用本构模型的研究成果,又计入了应变梯度对应力的贡献。以截面为单位尺寸正方形、无限长、小变形描述为例,讨论了理想弹塑性柱体内的P波行进特征,分析了梯度项、黏滞阻尼和滞变阻尼等效的材料内部尺寸效应。
A general modified constitutive model of gradient and viscosity dependent is proposed based on kinematics description by Lagrange; and specified one can be gotten from an elastoplastic constitutive model in infinitesimal theory that is verified. Such a way to deal with the Contribution by strain gradient and viscosity utilizes mostly the results of constitutive model research. And an analysis model of square intersection with unit sides, infinite in its length, and under infinitesimal description is adopted here to discuss the characteristic scale in perfect yielding material by parameters of the constitutive model under P wave inputting.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2007年第10期2036-2040,共5页
Rock and Soil Mechanics
基金
国家自然基金项目(No.50478034)
国家科技支撑计划项目(No.2006BAC13B02)
国家冻土工程重点实验室项目(No.SKLFSE200504)
关键词
非局部效应本构模型
内部尺寸
应变局部化
P波
strain gradient and viscosity dependent constitutive model
characteristic scale
strain localization
P wave
