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力学与实践 ›› 2006, Vol. 28 ›› Issue (2): 0-0.doi: 10.6052/1000-0992-2005-098

• 专题综述 •    

弹塑性损伤模型在应变局部化分析中的应用

杨璐 朱浮声 沈新普   

  1. 东北大学资土学院 沈阳市东北大学资源与土木工程学院 110004 沈阳工业大学建工学院
  • 收稿日期:2005-03-17 修回日期:2005-12-20 出版日期:2006-04-10 发布日期:2006-04-10

APPLICATION OF ELASTOPLASTICITY COUPLED WITH DAMAGE IN STRAIN LOCALIZATION ANALYSIS

  • Received:2005-03-17 Revised:2005-12-20 Online:2006-04-10 Published:2006-04-10

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Aifantis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.

关键词: 非局部, 弹塑性, 损伤, 本构模型

Abstract: 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.

Key words: elastoplasticity, constitutive model, damage, nonlocal models