库仑摩擦接触问题的位移─力混合接触单元

A Mixed Element of Displacement and Force of Coulomb Friction Contact

针对Coulomb摩擦接触问题的位移-力混合接触单元，为了防止接触面嵌入量太大，对于粘接状态在修正接触边界法向位移的同时，提出了一种修正切向位移的方法；为了利用FEM软件包的求解器，将接触单元滑动接触状态的单元刚度矩阵作了对称化处理，从而达到整个问题的总刚对称：这就很好地解决了有间隙接触问题。实例验证结果表明，所提出的方法是有效、可行的。

The amending tangential displacement method is put forward toward the amend-ing normal displacement of stick contact to prevent the inset on the surface of a mixed ele-ment of displacement and force of Coulomb friction contact. The element stiffness matrix ofsliding contact is symmetrized by using FEM resolver to get an entire symmetrization.