摘要
从本构曲线的塑性功的角度研究了应变硬化和应变软化的定义问题,引入了材料力学的微结构"自恰"原则,分析了应变软化-损伤之间的关系,同时针对岩土工程界关于应变软化介质多用负指数分布或Weibull分布描述应变本构关系,分析了Weibull分布下的应变软化介质的本构方程的参数求解模式,并对其参数特性和本构曲线的适应性进行了分析。
The definition of strain-softening and strain-hardening is studied from the plastic work of constitutive curve. The relation between strain-softening and damage is analyzed by introducing the micro-structural ＂self-consistent＂ rule in mechanics of materials. In geotechnical engineering, the constitutive model for strain-softening medium is mostly described by negative exponent distribution or Weibull distribution. In view of this, the model for solving the parameters of constitutive formula for strain-softening media under Weibull distribution is analyzed and its parameter characteristics and the adaptability of the constitutive curve are also discussed.
出处
《金属矿山》
CAS
北大核心
2008年第10期39-42,47,共5页
Metal Mine
基金
中国科学院知识创新工程重要方向项目(编号:kzcx2-yw-113)
关键词
岩土力学
应变软化
本构模型
WEIBULL分布
自恰准则
参数模型
Rock and soil mechanics, Strain-softening, Constitutive model,Weibull＇s distribution, Self-consistent rule, Prameter model
