| 试件厚度对铝合金疲劳裂纹扩展的影响 |
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| 引用本文： | 张诗捷,朱亦钢,黄新跃,刘绍伦.试件厚度对铝合金疲劳裂纹扩展的影响[J].航空学报,1994,15(6):757-760. |
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| 作者姓名： | 张诗捷 朱亦钢 黄新跃 刘绍伦 |
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| 作者单位： | 北京航空材料研究所机械性能研究室,北京,100095 |
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| 摘 要： | 不同厚度试样的疲劳裂纹扩展试验表明,飞行模拟载荷条件下具有明显的厚度影响。考查了模型对于厚度影响的预测能力。Ｎｅｗｍａｎ的模型具有预测厚度影响的潜力,广义改进的Ｗｉｌｌｅｎｂｏｒｇ模型不含有厚度影响的考虑,即使通过调整约束系数α的方法也难于计及厚度的影响。
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| 关 键 词： | 铝合金 裂纹扩展 尺寸稳定性 |
| 收稿时间： | 1993-03-16 |
| 修稿时间： | 1993-06-14 |
THICKNESS EFFECT ON FATIGUE CRACK PROPAGATION OF AI-ALLOY |
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| Zhang Shijie, Zhu Yigang, Huang Xinyue,Liu Shaolun.THICKNESS EFFECT ON FATIGUE CRACK PROPAGATION OF AI-ALLOY[J].Acta Aeronautica et Astronautica Sinica,1994,15(6):757-760. |
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| Authors: | Zhang Shijie Zhu Yigang Huang Xinyue Liu Shaolun |
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| Institution: | Mechanical properties department,Institute of Aeronautical Materials,Beijing,100095 |
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| Abstract: | atigue crack growth tests were conducted in 7475-T7351 Al alloy with specimens of different thicknesses From flight simulation loading tests a significant thickness effect was ob-served. Crack growth life prediction was carried out using some famous models.It was found that Newman’s model has the capability to predict thickness effect,while the generalized modified Willenborg model is not able to consider thickness effect evenby adjusting constraint coefficient.The physical reason of thickness effect and the modeling consideration are two of the important subjects for successful crack analysis. |
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| Keywords: | aluminum alloys crack propagation dimensional stability |
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