摘要
一种新的大位移接触摩擦单元采用点一面接触方式，能够模拟大位移情况下两物体间的张开、闭合和摩擦滑动，单元的基本未知量包括节点位移和接触应力。单元的几何和静力约束是作为补充方程包含在接触摩擦单元的刚度方程中。基于增量形式的有限元法，本文建立了大位移接触问题的等效单元刚度矩阵和荷载向量，使之与常规的有限元一样，可在单元水平上进行刚度和荷载的迭加。因而具有算法简单的优点。
Asimple contact friction interface element for large displacement problem is developed.This element considering node to segment contact can simulate frictional slippage. separa-tion,and re-bonding of two bodies with large movement.The primary unkowns for this el-ement include nodal displacements and contact stresses.Tbe geometrical and statical con-qtraints are taken as additional conditions which are included in stiffness equation of contactfriction interface element.Based on the incremental finite element method, the equivalent el-ement stiffness-constraint matrix and load vector are obtained which,as the same as stan-dard finite element,can be easily incorporated in the element level.Therefore the elementhas the advantage of algorithms sin1plicity.
出处
《华东交通大学学报》
1994年第1期1-10,共10页
Journal of East China Jiaotong University
关键词
大位移
接触摩擦
有限元
工程设计
Large displacement
Non-linear contact
Finite element
