Crankshaft failure analysis of a motor vehicle

被引：40

作者：

Fonte, M.

Li, Bin ^{[1
]}

Reis, L. ^{[1
]}

Freitas, M. ^{[1
]}

机构：

[1] ICEMS IST Tech Univ Lisbon, Lisbon, Portugal

来源：

ENGINEERING FAILURE ANALYSIS | 2013年 / 35卷

关键词：

Crankshaft failure; Crankpin; Rotating bending; Alternating bending; FATIGUE-CRACK GROWTH; ENGINE;

D O I：

10.1016/j.engfailanal.2013.01.016

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

A case study of a crankshaft catastrophic failure of a motor vehicle and its failure analysis is presented. The crankshaft suffered a mechanical seizure on the crankpin no. 2 after 3 years in service. It was repaired and after 30,000 km the vehicle had a damage again, with a catastrophic failure on the same crankpin. A transversal macrograph of the crankpin revealed that the crankpin was rectified and filled with a metal alloy for the same nominal diameter. Two fatigue cracks growing to the center of the crankpin where the final fracture occurred. The symmetric semi-elliptical crack front profile confirms the effect of a pure mode I under alternating bending. The catastrophic failure was a consequence of the inadequate repairing by a non-authorized manufacturer. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：147 / 152

页数：6

共 12 条

[1] Failure analysis of a vehicle engine crankshaft [J].