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脆性材料损伤表述方法及基于应变强度分布破坏准则的计算单元
Alternative TitleFormulation for damage of brittle materials and computational element based on criterion of strain strength distribution
李世海; 周东
Source Publication水利学报
2012-10-01
Volume43Issue:增刊1Pages:8-12
ISSN0559-9350
Abstract给出了一种表述脆性材料损伤的方法,提出了一种适用于岩石混凝土这类脆性非均匀材料的强度准则,称为应变强度分布准则。该准则以应变作为强度指标,并假设应变强度在空间中服从某种分布规律。提出了一种含裂缝的可均匀化的代表性体积单元,在代表性体积元内引入了完整度和破裂度的概念,定量的表征破坏比,在细观尺度上将未达到强度的完整材料部分用线弹性表述,将达到过应变强度的损伤部分用接触摩擦表达,建立了拉伸破坏、剪切破坏以及拉剪破坏的统一表述方式,形成了新的描述脆性材料宏观变形破裂特性的渐进损伤的破坏准则和本构模型。
Other AbstractA new method for describing damage of brittle material and a new strength criterion applicable to heterogeneous material such as rock and concrete are proposed. This criterion is called criterion of strain strength distribution in which strain is used as the measurement of strength. A homogenized representative volume element (RVE) containing cracks is introduced with the basic assumption that strain strength complies with a certain distribution law. The concepts of intact degree and fractured degree are proposed to representing the damage ratio of material quantitatively. Intact part of RVE maintains elasticity, while fractured part is described with contact theory in mesolevel. Based on the ideas above, a generalized formulation to tensile failure, shear failure and failure under joint effect of tension and shear is established and a new progressive failure criterion to describe macro deformation and fracture of brittle material is formed.
Keyword脆性材料 应变强度分布 破坏准则 完整度 破裂度 代表体积元
Subject Area岩体力学和土力学
URL查看原文
Indexed ByEI
Language中文
Funding Organization国家重点基础研究发展计划(973)项目(2010CB731500)
DepartmentLMFS工程地质体力学(LEM)
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/47313
Collection流固耦合系统力学重点实验室
Corresponding Author李世海
Recommended Citation
GB/T 7714
李世海,周东. 脆性材料损伤表述方法及基于应变强度分布破坏准则的计算单元[J]. 水利学报,2012,43(增刊1):8-12.
APA 李世海,&周东.(2012).脆性材料损伤表述方法及基于应变强度分布破坏准则的计算单元.水利学报,43(增刊1),8-12.
MLA 李世海,et al."脆性材料损伤表述方法及基于应变强度分布破坏准则的计算单元".水利学报 43.增刊1(2012):8-12.
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