Mises屈服准则及其在钻探工具强度设计中的应用

Application of Mises Yield Criterion in the Strength Design for Drilling Tools

在地质钻探工具设计和使用过程中,需要用到强度理论或屈服准则对遇到的钻采设备、工具失效等问题进行分析。为帮助人们对Mises屈服准则(应力)的理解,从理论上阐述了Mises屈服准则与畸变能密度理论的关系,其实质就是第四强度理论。在弹塑性范围内,Mises屈服准则统一了单向拉压状态的第一强度理论、复杂应力状态的第三强度理论和第四强度理论。Mises屈服准则在有限元数值分析中获得了更为广泛的应用。

In the process of designing and using the geological drilling tools, strength theory or yield criterion is required to analyze drilling equipment and tool failure problems. In order to help people understand Mises yield criterion （stress） , this paper introduces theoretically the relationship between the Mises yield criterion and the distortional strain energy density cri- terion, it is revealed that the essence of Mises yield criterions is the fourth strength theory. In the elasto-plastic range, Mises yield criterion unifies the first strength theory of the single tension or compression state, the third and fourth strength theory of complex stress state. Thus Mises yield criterion is more widely used in the finite element numerical analysis.