| 夹层材料裂纹体疲劳载荷作用下的J积分研究 |
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| 引用本文： | 李晓延,朱鸿官.夹层材料裂纹体疲劳载荷作用下的J积分研究[J].材料科学与工艺,1998,6(2):56-58,64. |
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| 作者姓名： | 李晓延 朱鸿官 |
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| 作者单位： | [1]北京工业大学材料学院 [2]哈尔滨工业大学现代焊接生产技术国家重点实验室 |
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| 摘 要： | 通过弹塑性有限元方法研究了裂纹平行于界面时夹层材料在平行于界面时夹层材料在Ｉ型疲劳功载荷作用下扩展裂纹的Ｊ积分的适用性，结果表明，在疲劳裂纹的起裂阶段，Ｊ积分具有良好的守恒性，而在随后的疲劳裂纹扩展过程中，由于裂纹尖端区域残留应力的影响，Ｊ积分具有明显的路径依赖性。
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| 关 键 词： | 疲劳 J积分 断裂 夹层材料 载荷作用 |
A Study of J Integral of Cracked Sandwich Body Under Fatigue |
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| Li Xiaoyan.A Study of J Integral of Cracked Sandwich Body Under Fatigue[J].Materials Science and Technology,1998,6(2):56-58,64. |
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| Authors: | Li Xiaoyan |
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| Abstract: | The suitability of applying J integral into sandwiched material with a fatigue crack parallel to the interface was studied by elastic-plastic finite element method under model I condition.It was found that,J integral had a good path independence at the initial stage of the fatigue crack growth.Because of the effect of residual stress of crack tip region,J integral appeared a significant path dependence in the afterward stage of fatigue crack growth. |
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| Keywords: | fatigue J integral fracture |
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