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构元组集损伤断裂模型及其与内聚区模型的比较
Alternative TitleCOMPONENT ASSEMBLING MODEL FOR DAMAGE AND FRACTUREAND ITS COMPARISON WITH COHESIVE ZONE MODEL
刘芳; 付强; 陈岑; 梁乃刚
Source Publication固体力学学报
2013-06-15
Volume34Issue:3Pages:241-246
ISSN0254-7805
Abstract结构的响应实质上是材料的响应,宏观结构损伤至断裂的发展过程也是材料性质不断演化的结果.构元组集模型从材料的微观物理变形机制出发,基于对泛函势理论和Cauchy-Born准则,抽象出两种构元:弹簧束构元和体积构元.在微观层次上,结构损伤和断裂的实质都是原子间键合力减弱和丧失的结果,而弹簧束构元是同一方向上的原子键的抽象,因此损伤可以通过弹簧束构元的响应曲线来反映.组集两种构元的响应,建立了材料的弹性损伤本构关系,从而能一致描述材料从弹性到损伤、破坏的发展过程.将构元组集模型的本构关系嵌入ABAQUS的用户材料单元子程序UMAT,实现对结构响应的数值模拟.论文模拟了包含中心预制裂纹三点弯曲梁的裂纹扩展过程,并与内聚区模型比较,给出了内聚区模型所假设的应力-位移关系曲线,并从材料损伤演化的角度对材料裂纹扩展过程做出了物理解释.
Keyword弹性损伤本构关系 裂纹扩展 Abaqus/umat 构元组集模型 内聚区模型
Subject Area本构关系
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Indexed ByCSCD
Language中文
Funding Organization国家自然科学基金项目(10721202);中央高校基本科研业务费专项资金(2013-IV-021)资助
CSCD IDCSCD:4871403
DepartmentLNM固体物理力学
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/47351
Collection非线性力学国家重点实验室
Corresponding Author刘芳
Recommended Citation
GB/T 7714
刘芳,付强,陈岑,等. 构元组集损伤断裂模型及其与内聚区模型的比较[J]. 固体力学学报,2013,34(3):241-246
APA 刘芳,付强,陈岑,&梁乃刚.(2013).构元组集损伤断裂模型及其与内聚区模型的比较.固体力学学报,34(3),241-246.
MLA 刘芳,et al."构元组集损伤断裂模型及其与内聚区模型的比较".固体力学学报 34.3(2013):241-246.
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