| 吊钩断裂原因分析 |
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| 引用本文： | 唐建群,张礼敬,巩建鸣,涂善东,张景明. 吊钩断裂原因分析[J]. 理化检验(物理分册), 2004, 40(3): 138-141 |
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| 作者姓名： | 唐建群 张礼敬 巩建鸣 涂善东 张景明 |
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| 作者单位： | 南京工业大学,南京,210009;扬子石油化工股份有限公司,南京,210048 |
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| 摘 要： | 某起重机吊钩使用1a(年)多突然断裂。采用宏、微观检验方法，对吊钩断裂失效原因进行了分析。结果表明，吊钩断裂的直接原因是由于低周疲劳所产生的裂纹，在外应力的作用下扩展所致；通过对吊钩材料化学成分分析和吊钩受力进行理论计算，认为材料选择不当，强度偏低是造成吊钩断裂的另一重要原因。
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| 关 键 词： | 吊钩 断裂 低周疲劳 裂纹 |
| 文章编号： | 1001-4012(2004)03-0138-04 |
FRACTURE ANALYSIS OF THE LIFTING HOOK |
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| TANG Jian-qun,ZHANG Li-jing,GONG Jian-ming,TU Shan-dong. FRACTURE ANALYSIS OF THE LIFTING HOOK[J]. Physical Testing and Chemical Analysis Part A:Physical Testing, 2004, 40(3): 138-141 |
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| Authors: | TANG Jian-qun ZHANG Li-jing GONG Jian-ming TU Shan-dong |
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| Abstract: | According to the character of fracture of the lifting hook, the failure reasons are analyzed by means of the macroexamination, the observation of metallographic structure and microscopic character of fracture. It is concluded that the direct reason of failure is the cracks caused by the low cycle fatigue and extention by the alternative stress. Another important reason is the incorrect material selection and the relatively low strength of the material in the light of analysis of the chemical composition and applied strcss computation theoretically. |
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| Keywords: | Lifting hook Fracture Low cycle fatigue Crack |
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