Algorithm of DRM with Kinetic Damping for Finite Element Static Solution of Strain-Softening Structures

被引：6

作者：

Wang, Wei ^{[1
]}

Su, Xiaozu ^{[1
]}

机构：

[1] Tongji Univ, Coll Civil Engn, Shanghai 200092, Peoples R China

来源：

ADVANCES IN MATERIALS SCIENCE AND ENGINEERING | 2017年 / 2017卷

基金：

中国国家自然科学基金;

关键词：

DYNAMIC RELAXATION; DAMAGE;

D O I：

10.1155/2017/8060987

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In order to deal with the divergence and instability due to the ill-posedness of the nonlinear finite element (FE) model of strain-softening structure in implicit static analysis, the dynamic relaxation method (DRM) was used with kinetic damping to solve the static increments in the incremental solution procedure so that the problem becomes well-posed. Moreover, in DRM there is no need to assemble and inverse the stiffness matrix as in implicit static analysis such that the associated computational cost is avoided. The ascending branch of static equilibrium path was solved by load increments, while the peak point and the descending branch were solved by displacement increments. Two numerical examples illustrated the effectiveness of such application of DRM in the FE analysis of static equilibrium path of strain-softening structures.

引用

页数：7