二维切削仿真

我在做单颗磨粒二维仿真，运算结果如下图，请大神分析下，问什么，怎么解决？警告信息是：ASSEMBLY_TOOL is a rigid surface, so it will be made the master surface in the contact pair with surface ASSEMBLY_WORKPIECE-UP. The WEIGHT value reported in the .dat file for this contact pair is not correct.The elements in element set WarnElemFailElemInContact are part of a deformable surface that is referenced by a *CONTACT PAIR option in addition to having material properties that allow the element to fail. For elements that can fail, contact should be defined using the *CONTACT option.