Then,the Tresca and Mises yield criterions are applied to deduce the computing formulae of collapsing pressure for casing destruction under the conditions of non-considering and with considering casing axial loads,respectively.
将非均匀地应力场中套管载荷和套管内应力分布的理论公式推广到包含内压的情况,并采用Tresca屈服准则和Mises屈服准则,分别推导了在忽略套管轴向载荷和考虑套管轴向载荷两种情况下套管强度破坏时挤毁压力的计算公式。