[1]黄江,龙伟.基于失效路径的含裂纹起重机寿命预测[J].深圳大学学报理工版,2015,32(3):245-250.[doi:10.3724/SP.J.1249.2015.03245]
 Huang Jiang and Long Wei.Residual life prediction of crane with crack based on the defect failure path[J].Journal of Shenzhen University Science and Engineering,2015,32(3):245-250.[doi:10.3724/SP.J.1249.2015.03245]
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基于失效路径的含裂纹起重机寿命预测()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第32卷
期数:
2015年第3期
页码:
245-250
栏目:
材料科学
出版日期:
2015-05-20

文章信息/Info

Title:
Residual life prediction of crane with crack based on the defect failure path
文章编号:
201503004
作者:
黄江龙伟
四川大学制造科学与工程学院,成都 610065
Author(s):
Huang Jiang and Long Wei
College of Manufacturing Science and Engineering, Sichuan University, Chengdu 610065, P.R.China
关键词:
起重机械冶金起重机疲劳裂纹裂纹扩展失效速率曲线拟合剩余寿命
Keywords:
lifting machine metallurgical crane fatigue crack crack extension failure rate curve fitting residual life
分类号:
TH 215
DOI:
10.3724/SP.J.1249.2015.03245
文献标志码:
A
摘要:
针对桥式冶金起重机金属结构裂纹缺陷失效临界尺寸值难以确定的问题,通过交变载荷加载试验,对裂纹缺陷的失效路径和失效速率进行仿真,得到其真实的失效离散轨迹.利用Matlab进行曲线拟合,建立失效速率与裂纹尺寸之间的函数关系式,采用数值积分法计算缺陷剩余寿命,得到速率拐点处裂纹的几何参数,即标准临界尺寸值,为Paris迭代法评估金属结构疲劳裂纹失效提供了理论依据.
Abstract:
It is quite difficult to determine the exact critical value of metal structures in bridge metallurgical cranes with fatigue crack failures. This paper simulates the defect failure paths and rates of metal structures by performing cyclic loading tests and obtains a real trajectory of assessing points. A function between failure rates and crack size is established by using Matlab software, and the residual life of defects is calculated by numerical integration. Finally, an accurate mutation point, also called a “standard critical size value”, can be calculated from the simulation map. Thus, this work provides a more scientific and precise theoretical basis of the Paris iterative method for assessing the fatigue crack failures of metal structures.

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备注/Memo

备注/Memo:

Received:2014-10-28;Accepted:2015-03-20
Foundation:National Natural Science Foundation of China(51075286)
Corresponding author:Professor Long Wei.E-mail:991785081@qq.com
Citation:Huang Jiang,Long Wei.Residual life prediction of crane with crack based on the defect failure path[J]. Journal of Shenzhen University Science and Engineering, 2015, 32(3): 245-250.(in Chinese)基金项目:国家自然科学基金资助项目(51075286)
作者简介:黄江(1990—),男(汉族),四川省都江堰市人,四川大学硕士研究生.E-mail:991785081@qq.com
引文:黄江,龙伟.基于失效路径的含裂纹起重机寿命预测[J]. 深圳大学学报理工版,2015,32(3):245-250.
更新日期/Last Update: 2015-05-11