汽车发动机张紧器摆臂断裂失效分析
Fracture Failure Analysis of Tensioner Swing-arm of Automobile Engine
袁成逸 1丁华 1冯波 1阳大云 1徐文雷1
作者信息
- 1. 吉利汽车研究院(宁波)有限公司 浙江 宁波 315336
- 折叠
摘要
汽车发动机张紧器摆臂进行台架耐久试验时发生断裂失效.通过宏观观察、断口形貌、化学成分、金相组织及硬度等测试方法分析了张紧器摆臂的断裂失效原因.结果表明:张紧器摆臂断裂起始源区存在疏松缺陷,减小了有效承载面积,在外界交变载荷的作用下,疏松缺陷区域产生应力集中,最终导致张紧器摆臂发生断裂失效.
Abstract
The fracture failure occurred in the tensioner swing-arm of the automobile engine during the endurance test.The fracture failure reasons of the tensioner swing-arm were analyzed by a variety of meth-ods including macroscopic inspection,fracture surface morphology analysis,chemical analysis,metallo-graphic structure observation and hardness test.The results show that the effective bearing area was re-duced by the porosity defects in the source area of the tensioner swing-arm fracture.The additional stress concentration was caused in the porosity defect area with the action of external alternating load,and it ulti-mately led to fracture failure of the tensioner swing-arm.
关键词
铝合金/张紧器摆臂/疏松/断裂失效Key words
Aluminum alloy/Swing-arm/Porosity/Fracture failure引用本文复制引用
出版年
2024
NETL
NSTL
万方数据