Analysis of abnormal fatigue failure of forklift forks

George Pantazopoulos, Athanasios Vazdirvanidis, Andreas Rikos, Anagnostis Toulfatzis
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引用次数: 12

Abstract

The analysis of an abnormal failure of forklift forks is presented in this work. The investigation results suggested that failure occurred due to fatigue mechanism followed by sudden overload fracture. The orientation of fatigue fracture indicates abnormal lifting operation, favouring crack initiation from outer fork area which is the compression designed zone. Moreover, various surface flaws and weakness areas (such as surface marks, decarburized microstructures and weld zones) identified on the outer fork zone, compromise fatigue strength inducing premature crack nucleation and fast growth towards final failure.

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叉车叉异常疲劳失效分析
本文对某叉车叉的异常故障进行了分析。研究结果表明,失效是由疲劳机制引起的,然后是突然过载断裂。疲劳断口的取向表明吊装操作异常,有利于外叉区即压缩设计区起裂。此外,外叉区存在各种表面缺陷和薄弱区域(如表面痕迹、脱碳组织和焊接区),导致疲劳强度降低,导致裂纹过早形核并快速扩展至最终失效。
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