ABAQUS用XFEM和低周循环步显示如下错误

***NOTE: THE RATIO OF G/Gthresh=2.02527E-08 AT ELEMENT 84 IS LESS THAN ONE, 

          FATIGUE CRACK MAY NOT GROW

 ***NOTE: THE RATIO OF G/Gthresh=1.94199E-08 AT ELEMENT 90 IS LESS THAN ONE, 

          FATIGUE CRACK MAY NOT GROW

ABAQUS的msg文件显示如上错误，裂纹不扩展，有大佬知道如何修改吗？是什么错误导致的吗？万分感谢