| 弹塑性条件下工程小裂纹疲劳扩展试验研究 |
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| 引用本文： | 郑旻仲,聂学州,刘晓光.弹塑性条件下工程小裂纹疲劳扩展试验研究[J].航空学报,1991,12(2):16-21. |
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| 作者姓名： | 郑旻仲 聂学州 刘晓光 |
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| 作者单位： | 飞机结构强度研究所
(郑旻仲，聂学州)，飞机结构强度研究所(刘晓光) |
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| 摘 要： | 本文对在弹塑性条件下工程小裂纹的疲劳扩展规律进行了分析研究。给出了用△J积分作为在弹塑性条件下疲劳裂纹扩展主要控制参数的表达式。对工程小裂纹在缺口循环塑性区中的扩展规律提出了用修正的△J_(eff)积分描述和分析的表达方法,并与试验结果进行了比较。
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| 关 键 词： | 工程小裂纹 弹塑性条件 缺口循环塑性区 |
AN EXPERIMENTAL STUDY ON FATIGUE CRACK GROWTH FOR ENGINEERING SMALL CRACKS UNDER ELASTO-PLASTIC CONDITION |
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| Aircraft Structure Strength Research Institute Zheng Minzhong,Nie Xuezhou and Liu Xiaoguang.AN EXPERIMENTAL STUDY ON FATIGUE CRACK GROWTH FOR ENGINEERING SMALL CRACKS UNDER ELASTO-PLASTIC CONDITION[J].Acta Aeronautica et Astronautica Sinica,1991,12(2):16-21. |
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| Authors: | Aircraft Structure Strength Research Institute Zheng Minzhong Nie Xuezhou and Liu Xiaoguang |
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| Institution: | Aircraft Structure Strength Research Institute |
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| Abstract: | The fatigue crack growth behaviour of engineering small cracks under elasto-plastic condition is studied. The J-integral expression as a main control parameter of fatigue crack growth under elasto-plastic condition is presented.It is suggested that the modified ΔJeft-integral can he used as a main control parameter for engineering cracks in cyclic and plastic area of a notch. The method was verified by the experimental results. |
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| Keywords: | engineering small crack elasto-plastic condition cyclic plastic area of a notch |
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