Goodman接触面单元的修正与探讨

MODIFICATION OF GOODMAN INTERFACE ELEMENT

针对Goodman接触面单元的构造特征,提出了在单元法向加设刚连杆的修正方法,从物理方法上实现接触面单元与其他单元不会发生相互嵌入的现象。这一方法有效地克服了Goodman接触面单元有可能存在的两侧单元嵌入的缺陷,解决了单元应力误差难以控制的问题,详细探讨了修正Goodman接触面单元的有限元实现方法,使其在有限元计算中易于使用。

To the defects of existing Goodman interface element,a better modification method is proposed. This element is connected by innumerous springs in tangent direction and by innumerous rigid rods in normal direction. In this way,the problems of considerable large error in stress calculation and large element overlapping in the existing Goodman interface element can be avoided. The implementation of the modified Goodman interface element is given in detail in the paper to facilitate the FEM application.