摘要
基于准脆性材料的断裂力学和塑性理论 ,提出了用于岩土节理软化行为描述的弹性软化塑性本构模型· 模型的主要特点是 :1)节理材料的软化塑性和扩容特性直接与断裂失效过程相联系 ,所采用的材料参数比已有的弹塑性软化模型所用的参数少 ;2 )模型可以描述混合断裂失效及相应的摩擦滑动 。
On the basis of plasticity and fracture mechanics for quasi_brittle materials, this article presented a constitutive model for gradual softening behavior of joints of geomaterials. Corresponding numerical tests are carried out at the local level. Characteristics of the model proposed are: 1) plastic softening and dilatancy behavior are directly related to the fracture process of joint, and much less material and model parameters are required compared with those proposed by references; 2) the process of decohesion coupled with frictional sliding at both micro_scale and macro_scale is described.
出处
《应用数学和力学》
EI
CSCD
北大核心
2002年第9期975-981,共7页
Applied Mathematics and Mechanics
基金
辽宁省自然科学基金资助课题 (0 70 0 91)
关键词
界面裂纹
类脆性断裂
节理单元
扩容
非关联
塑性
interface crack
quasi_brittle fracture
joint element
dilatancy
non_associated plasticity
