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Failure analysis of railroad couplers of AAR type E

机译:E型AAR铁路耦合器的失效分析

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摘要

The paper is about the failure of Railway couplers of AAR type E. Most of the couplers are being replaced before their expected life due to the high stress concentration near pulling lug region, cage-hole and pivot-hole. Knuckle, a part of coupler is designed and analyzed to determine the key regions of failure. A change in the design has been proposed and analyzed to compare the original and modified version of the knuckle. The results of analysis allowed assessing the failure reasons. A set of dimensions are chosen and the response surface methodology (RSM) technique has been implemented to obtain the optimum values for the design variables within given constraints. Life of the new design shows significant increase in life over the original design.
机译:本文是关于E型AAR铁路耦合器的故障。由于在拉动凸耳区域,笼孔和枢轴孔附近的高应力集中,大多数耦合器在其预期使用寿命之前就已更换。设计并分析了耦合器的一部分转向节,以确定失效的关键区域。已提出设计变更并进行了分析,以比较转向节的原始版本和修改版本。分析结果允许评估失败原因。选择一组尺寸,并已采用响应面方法(RSM)技术来获得给定约束内设计变量的最佳值。新设计的寿命比原始设计的寿命显着增加。

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