应变软化(strain softening)是指材料试件经1次或多次加载和卸载后,进一步变形所需的应力比原来的要小,即应变后材料变软的现象。应变软化过程中,随着应力的加大,应变增长的速率加快。动态恢复、动态重结晶作用以及流体的加入等都有利于应变软化。这种材料行为,即称为应变软化。
It is pointed out that due to the stress drop and strain softening of brittle material damage localization will occur ahead of a macroscopic crack under external loads. The method of calculating the length of damage localization band is given.
指出由于应力跌落和应变软化的原因,在脆性材料的宏观裂纹尖端将产生损伤局部化,并给出了损伤局部化带长度的计算方法。
参考来源 - 脆性材料的细观损伤理论和损伤结构的安定分析The non-Uniqueness of solution to structure considering material strain-softening wills occur evens if under conditions of small deformation. At the same time, a coupled-principle that is used to judge the bifurcation of structure is put forward.
在论文的上篇主要做了如下一些工作: 一、在理论上,图解说明了应变软化材料满足应变空间下的Ilyushin假设;证明了在小变形条件下考虑材料的应变软化特性时,结构也有可能出现解的非唯一性,同时给出了一种用于结构分叉分析的耦合判断准则;最后提出了一种求解结构极限荷载的数值方法。
参考来源 - 力学仿真中的应变软化问题数模分析与神经计算力学研究·2,447,543篇论文数据,部分数据来源于NoteExpress
在应变软化材料的主裂缝尖端存在一断裂过渡区。
There is a fracture process zone near the crack tip for the tensile strain softening materials.
在应变软化阶段,试样的变形由对称性向非对称性转变。
Symmetrical deformation mode of the specimen was converted into asymmetrical pattern beyond peak stress.
该模型包括了应变率敏感性效应,应变软化效应和应变硬化效应。
The model includes the effect of strain rate sensitivity, strain softening and strain hardening.
应用推荐