## 留言板

 引用本文: 陈昌荣. 层状陶瓷的材料力和裂纹力评估方法[J]. 应用数学和力学, 2016, 37(7): 748-755.
CHEN Chang-rong. A Method for Evaluating Material Forces and Crack Forces in Ceramic Laminates[J]. Applied Mathematics and Mechanics, 2016, 37(7): 748-755. doi: 10.21656/1000-0887.370088
 Citation: CHEN Chang-rong. A Method for Evaluating Material Forces and Crack Forces in Ceramic Laminates[J]. Applied Mathematics and Mechanics, 2016, 37(7): 748-755.

• 中图分类号: O343

## A Method for Evaluating Material Forces and Crack Forces in Ceramic Laminates

Funds: The National Natural Science Foundation of China（51175321）
• 摘要: 用J积分理论分析了层状陶瓷受弯曲载荷作用时Jfar(0)Jfar(a)Jfar(a)-Jfar(0)Jtip的特点，这里Jfar(0)Jfar(a)分别表示无裂纹时和裂纹长度为a时的远场J积分，Jtip表示裂尖J积分.裂纹是垂直于界面的表面裂纹，基本假设是裂纹只影响局部应力应变场.由于积分路径所包围的材料界面长度随积分路径变化，导致Jfar(0)Jfar(a)都随积分路径变化，但当积分路径远离裂纹影响区域时Jfar(a)-Jfar(0)不再随路径变化.Jfar(a)-Jfar(0)可作为非均匀材料断裂的远场驱动力参量，Jtip-(Jfar(a)-Jfar(0))可用来评价材料非均匀性对裂纹扩展驱动力的促进或抑制作用.
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##### 出版历程
• 收稿日期:  2016-03-28
• 修回日期:  2016-04-21
• 刊出日期:  2016-07-15

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