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Elasto-plastic behaviour of cantilever beams containing varied stress concentration cut out features

机译:悬臂梁的弹性塑料行为,含有变化应力集中的变化特征

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摘要

In machine component design, it is necessary to introduce openings or cut outs to carry out specific service functions such as electrical wiring, piping, and inspection, among others. The introduction of these cut outs results in a high concentration of stress leading to degradation of the component strength, especially under cyclic loading. The geometrical features and orientation of these cut outs relative to the support and the applied loads will also influence the severity of the resulting stress concentration. Of particular interest to this study is the elastic and elasto-plastic behaviour of a cantilever beam containing rectangular, circular or diamond cut outs under plane strain conditions. Four aspects of the work were accordingly examined. The first is concerned with the elasto-plastic load-deflection diagram of the beam containing the cut out features. The second with the finite element predictions of the elastic behaviour and the associated stress concentration factor of the beam in the presence of the cut out features. The third with the elasto-plastic behaviour and etching results showing the remarkable agreement between the two. Finally, in the fourth, we focus our attention to unloading residual stresses. The results offer a complete coverage of the problem and should help in the elasto-plastic design of beams containing stress concentration features.
机译:在机器元件设计中,有必要引入开口或切除,以执行特定的服务功能,例如电线,管道和检查等。这些切口的引入导致高浓度的应力,导致组分强度降解,特别是在环状载荷下。这些切口相对于支撑件的几何特征和取向以及施加的负载也将影响所得应力集中的严重程度。本研究特别令人兴趣是悬臂梁的弹性和弹性塑料行为,其含有矩形,圆形或金刚石在平面应变条件下切出。相应地检查了这项工作的四个方面。首先涉及包含剪切特征的光束的弹性塑料载荷偏转图。第二个是在剪切特征存在下的弹性行为的有限元预测和梁的相关应力集中因子。第三种具有弹性塑料的行为和蚀刻结果,结果显示了两者之间的显着协议。最后,在第四,我们将注意力集中在卸下残余的压力。结果提供了完整的问题覆盖范围,并应有助于含有应力集中特征的梁的弹性塑料设计。

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