利用相变增韧理论和Eshelby等效夹杂方法,给出任意形状夹杂对I型裂纹应力强度因子影响的近似解析解.和有限元分析结果比较表明,由于引入远场应力对夹杂的作用,导出的近似解有较好的精度,适用于处理较大尺寸和具有任意形状的夹杂对I型裂纹应力强度因子的影响. By using the theory of phase change toughening and the Eshelby equivalent inclusion method, an approximate analytical solution of the effect of arbitrary shape inclusions on the stress intensity factor of type I crack is given. Comparing with the results of finite element analysis, it is deduced that due to the effect of far-field stress on inclusions, The approximate solution has better accuracy and is suitable for dealing with the influence of larger size and arbitrary shape inclusions on the type I crack stress intensity factor.