偏斜应变能J^＊积分及应用

J~* Integral of the Specific Deviator Strain Energy and Its Application

引进偏斜应变能的概念，对平面裂纹起裂扩展问题进行了讨论，给出了一个与路径无关的J^*积分，同时对其守恒性给予了严格的证明，通过Ⅰ型裂纹的应用，其结果与现行公开发表的文献或手册结果一致。

First the deviator strain energy is introduced, then the problem of plane-crack critical growth was discussed, a path independent line integral J* was defined, furthermore its conservation was proved strictly. As application examples,mode-I stress intensity factors of cracked beam were obtained with present approach.The results were shown to agree well with those available in the open literature.