弹塑性损伤模型在应变局部化分析中的应用  

APPLICATION OF ELASTOPLASTICITY COUPLED WITH DAMAGE IN STRAIN LOCALIZATION ANALYSIS

作　　者：杨璐[1] 朱浮声[1] 沈新普[2] 

机构地区：[1]东北大学资土学院,沈阳110001 [2]沈阳工业大学建工学院,沈阳110023

出　　处：《力学与实践》2006年第2期9-15,32,共8页Mechanics in Engineering

基　　金：国家自然科学基金项目(10472072)资助

摘　　要：非局部本构理论是为了有效地模拟应变局部化现象而提出并被广泛采用的理论模型．将目前已有的模型归为两大类,一是面积加权平均的非局部非弹性模型;二是梯度依赖的非局部模型．经过对这两大类模型的比较研究,发现Aiflantis模型用于非均匀材料的局部化现象数值模拟时是一个较为理想的模型,但该模型还有需改进之处．Nonlocal constitutive models are widely used for effectively simulating strain localization. The major models may be classified into the following two kinds： the weighted-area-averaged nonlocal model and the gradient-enhanced-nonlocal model. Comparison between the two models is made in this paper. It is found that the Aifantis model is a reasonable choice for numerical simulation of a localized non-homogeneous material, but it is subject to some improvements.

关 键 词：非局部 弹塑性 损伤 本构模型 

分 类 号：TU432[建筑科学—岩土工程] TU43[建筑科学—土工工程]