The present work deals with the modification in linear damage accumulation using Palmgren-Miners rule which ignores the affects of loading sequence. Loading sequence plays a vital role in components like plates used in axle housing, as their loading pattern and its Stress Ratio ‘R’ continuously varies depending upon its application and the vehicle road terrain in which it operates. Loading cycles depending upon its severity induces strain hardening in the material due to its cyclic plasticity during the working conditions. This hardening affects the results in compressive residual stresses and its relaxation during the next stress cycle. One such loading condition in the axle housing has been taken as a case study and its strain hardening approach inducing residual stresses has been analyzed. It is found that if the affects of residual stress are taken into consideration, the life of the component is improved by 25.09% for the same sequence of loadings. It is also revealed from digital validation and experimental results that the transition radius is the most critical stress zone in the axle housing leading to housing cracks. The crack path analysis using local approaches helps to correlate the experimentation cracking path with the design calculations. 3-Dimensional approaches using finite element has revealed that the zone of maximum strain energy density in plate in the bending mode, is independent of its thickness and it depends only on the surface notch sensitivity.

本工作使用Palmgren-Miners规则处理线性损伤累积的修改，该规则忽略了加载顺序的影响。加载顺序在轴箱中使用的板等组件中起着至关重要的作用，因为它们的加载方式及其应力比“ R”会根据其应用和运行所在的车辆地形不断变化。取决于其严重程度的加载周期会由于其在工作条件下的循环可塑性而引起材料的应变硬化。这种硬化会影响压缩残余应力的结果，并在下一个应力周期内松弛。以轴箱中的这种负载情况为例进行了研究，并分析了其引起残余应力的应变硬化方法。发现，如果考虑到残余应力的影响，对于相同的加载顺序，组件的寿命将提高25.09％。从数字验证和实验结果还可以看出，过渡半径是导致轴箱破裂的轴箱中最关键的应力区域。使用局部方法的裂纹路径分析有助于将实验裂纹路径与设计计算相关联。使用有限元的3维方法显示，在弯曲模式下，板中最大应变能密度的区域与厚度无关，并且仅取决于表面缺口敏感性。从数字验证和实验结果还可以看出，过渡半径是导致轴箱破裂的轴箱中最关键的应力区域。使用局部方法的裂纹路径分析有助于将实验裂纹路径与设计计算相关联。使用有限元的3维方法显示，在弯曲模式下，板中最大应变能密度的区域与厚度无关，并且仅取决于表面缺口敏感性。从数字验证和实验结果还可以看出，过渡半径是导致轴箱破裂的轴箱中最关键的应力区域。使用局部方法的裂纹路径分析有助于将实验裂纹路径与设计计算相关联。使用有限元的3维方法显示，在弯曲模式下，板中最大应变能密度的区域与厚度无关，并且仅取决于表面缺口敏感性。