| 多轴比例加载下疲劳短裂纹扩展速度的探讨 |
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| 引用本文： | 于强.多轴比例加载下疲劳短裂纹扩展速度的探讨[J].四川轻化工学院学报,2011(5):526-529. |
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| 作者姓名： | 于强 |
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| 作者单位： | 四川理工学院理学院,四川自贡643000 |
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| 摘 要： | 多轴加载下疲劳短裂纹的研究,是近几年来才触及的一个新领域。文章分析了多轴比例载荷与单轴载荷的等效性。提出了多轴比例加载不会改变材料力学性能的假设,在临界面上用能量密度法,类比单轴加载的研究过程,导出了多轴比例加载下疲劳短裂纹扩展速度的计算公式。
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| 关 键 词： | 临界平面 多轴疲劳 短裂纹扩展速度 能量密度 |
Research on the Short Fatigue Crack Growth Rate under the Proportioned Multi-axial Loading |
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| YU Qiang.Research on the Short Fatigue Crack Growth Rate under the Proportioned Multi-axial Loading[J].Journal of Sichuan Institute of Light Industry and Chemical Technology,2011(5):526-529. |
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| Authors: | YU Qiang |
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| Affiliation: | YU Qiang(School of Science,Sichuan University of Science ＆ Engineering,Zigong 643000,China) |
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| Abstract: | The research on the rule of short fatigue crack growth rate by multi-axial loading remains a new frontier in recent years.The equivalence of proportioned multi-axial loading and uni-axial loading are analyzed.The hypothesis of inability for proportioned multi-axial loading to alter the mechanical properties of the materials is put forward.Therefore,the formula of short fatigue crack growth rate by multi-axial loading can be derived by adopting the principle of energy density on the critical plane and making an analogy to the research of uni-axial loading. |
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| Keywords: | critical plane multi-axial fatigue short crack growth rate energy density |
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