考虑损伤效应的冻粘土蠕变本构理论研究  

Study on frozen soil creep constitutive of theory accounting for damage

作　　者：李栋伟[1] 汪仁和[1] 

机构地区：[1]安徽理工大学土木工程系,安徽淮南232001

出　　处：《煤田地质与勘探》2007年第1期53-55,共3页Coal Geology & Exploration

基　　金：安徽省自然科学基金(050440501)资助

摘　　要：用简单的屈服函数作为冻土塑性损伤变量,对西源模型中的粘塑性蠕变量进行损伤修进。通过相关推导得到了冻土粘弹塑性损伤本构方程。通过用户子程序将此本构模型嵌入到大型商业有限元软件ADINA中。有限元计算结果表明:考虑损伤的冻土本构模型能较好的模拟加速蠕变阶段,可用于深井工程实践。The simple yield standard is used to determine the damage variables frozen soil, therefore Xiyuan Model viscoplastic creep is repaired, The constitutive function of the viscoelastic plastic damage-coupling is deduced. The viscoelastic plastic damagecoupling constitutive model for geo-materials is embeded into the commercial FEM software ADINA as a user＇s subroutine. FEM analysizing suggest that the model is of the feature of the non-linear accelerative creep frozen soil, and can be used for engineering practice,

关 键 词：冻土 粘弹塑损伤 本构方程 屈服函数 

分 类 号：TD265.3[矿业工程—矿井建设]