CRACK DEFLECTION AT AN INTERFACE BETWEEN DISSIMILAR ELASTIC-MATERIALS
CRACK DEFLECTION AT AN INTERFACE BETWEEN DISSIMILAR ELASTIC-MATERIALS
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DOI：
10.1016/0020-7683(89)90021-8
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发表时间：
1989-01-01
影响因子：
3.6
通讯作者：
HUTCHINSON, JW
中科院分区：
文献类型：
--
作者：
HE, MY;HUTCHINSON, JW
冲击两种不同材料的界面的裂纹可以通过穿透界面或偏转到界面中而停止或前进。本文研究了当界面两侧的材料均为弹性各向同性时，挠度与贯入之间的竞争。将偏转裂纹的能量释放率与穿透裂纹的最大能量释放率进行了比较。结果可用于确定界面韧性相对于本体材料韧性的范围，以确保裂纹将偏转到界面。
A crack impinging an interface joining two dissimilar materials may arrest or may advance by either penetrating the interface or deflecting into the interface. The competition between deflection and penetration is examined in this paper when the materials on either side of the interface are elastic and isotropic. The energy release rate for the deflected crack is compared with the maximum energy release rate for a penetrating crack. The results can be used to determine the range of interface toughness relative to bulk material toughness which ensures that cracks will be deflected into the interface.