连杆
断裂(地质)
柴油机
结构工程
压力(语言学)
破损
机械加工
有限元法
圆柱
应变计
材料科学
工程类
复合材料
机械工程
汽车工程
哲学
语言学
作者
Slavko Rakić,Uglješa Bugarić,Igor Radisavljević,Zeljko Bulatovic
标识
DOI:10.1016/j.engfailanal.2017.04.014
摘要
This paper presents failure analysis of the connecting rod used in a 12-cylinder diesel engine set on a special vehicle. The fracture of the connecting rod occurred during the engine test in laboratory conditions. Chemical and metallographic analysis as well as mechanical testing have confirmed that the material properties of the connecting rod met the requirements of standard specification and technical documentation. Linear finite element (FE) analysis was performed to evaluate stress state of the connecting rod under maximum load. The results of FE analysis showed that the position of the fracture is consistent with the zone of highest stress. Fractographic analysis has not been able to reveal the main cause of mechanism of fracture due to substantially damaged fracture surface. Inadequate machining, absence of polishing and highest stress in the region of fracture were identified as the main causes of failure. Finally, the engine had been working at maximum load for a longer period of time that also led to the breakage of the connecting rod.
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