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中文摘要：
该文构建了适用于扩展有限元法（XFEM）的界面接触算法,该算法具备模拟界面上粘连、滑动和分离状态的能力。对平面摩擦问题的计算结果表明,该方法对于界面接触行为的描述能力与常规接触面单元十分接近。对平面应变压剪试样中剪切带问题的模拟分析表明,该算法合理地反映了摩擦接触的耗散机制,从而避免了零能耗散现象,能够较准确地描述平面应变压剪试样中的局部化变形现象。
英文摘要：
A contact algorithm based on an extended finite element method（XFEM） is established,which is able to simulate the adhesion,slide and separation of a contact interface.The results of an example for a plane frictional problem demonstrate that the performance on describing the contact behavior of this algorithm is almost identical to that of a conventional interface element.The results of an example on the shear band in a plane strain sample demonstrate that this algorithm can reflect the dissipation mechanism of a frictional contact reasonably and therefore avoid the phenomenon of zero energy dissipation and then be able to describe the strain localization in the plane strain sample.
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