| 弹塑性疲劳微弯裂纹尖端塑性区问题 |
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| 引用本文： | 杨大鹏,赵耀. 弹塑性疲劳微弯裂纹尖端塑性区问题[J]. 应用力学学报, 2007, 24(4): 578-583 |
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| 作者姓名： | 杨大鹏 赵耀 |
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| 作者单位： | 华中科技大学,430074,武汉 |
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| 摘 要： | 主要研究疲劳载荷作用下弹塑性裂纹弯曲延伸扩展问题.通过分析论证,比较精确地研究了疲劳载荷作用下弯曲延伸裂纹尖端塑性区域边界上交变应力的分布状况.综合考虑了疲劳作用应力,塑性区域交变应力,利用二阶摄动方法,研究计算了弯曲延伸裂纹尖端塑性区域的范围,并预测了疲劳载荷作用下弹塑性裂纹扩展路径.
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| 关 键 词： | 弯曲延伸裂纹 塑性区域边界 疲劳作用应力 二阶摄动方法 |
| 文章编号： | 1000-4939(2007)04-0578-06 |
| 修稿时间： | 2006-03-20 |
Plastic Area at Slightly Curved Fatigue Crack Tip |
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| Yang Dapeng,Zhao Yao. Plastic Area at Slightly Curved Fatigue Crack Tip[J]. Chinese Journal of Applied Mechanics, 2007, 24(4): 578-583 |
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| Authors: | Yang Dapeng Zhao Yao |
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| Abstract: | The elasto-plastic crack curve prolongation is mainly investigated,and the cyclic stress distribution on the plastic area of extend fatigue curve crack tip is evaluated accurately.The paths of elasto-plastic fatigue crack propagation are predicted as a practical case of second order perturbation method,where the effects of applied cyclic stresses on plastic area border at the fatigue crack tip are taken into consideration. |
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| Keywords: | curve extension crack boundaries of plasticity area fatigue applied stresses a second order perturbation solution. |
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