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首页> 外文期刊>Journal of teoretical and applied mechanics >FATIGUE LIFE OF METALLIC MATERIAL ESTIMATED ACCORDING TO SELECTED MODELS AND LOAD CONDITIONS
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FATIGUE LIFE OF METALLIC MATERIAL ESTIMATED ACCORDING TO SELECTED MODELS AND LOAD CONDITIONS

机译：根据所选模型和负载条件估算的金属材料的疲劳寿命

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The authors present results of a fatigue test for specimens made of the aluminium alloy 2017A-T4 and alloy steels S355J2WP and S355J2G3 subjected to constant-amplitude proportional combined bending with torsion including mean stress values and for the S355J2WP alloy steel under uniaxial constant-amplitude and random loading with both zero and nonzero mean stress values. The test results were compared with the results of calculations according to the models proposed by Goodman, Gerber and Morrow as well as the stress-strain parameter. In the case of calculations based on the stresses, the multiaxial stress state was reduced to a uniaxial one using the Huber-Mises relationship. As for the method based on strain energy density, the multiaxial stress state was reduced to the uniaxial one with use of the stress-strain parameter. The plane in which the stress-strain parameter of shear loadings reaches its maximum value is assumed to be the critical plane.
机译：作者介绍了疲劳试验的结果，该试验对铝合金2017A-T4以及合金钢S355J2WP和S355J2G3进行了包括平均应力值的等幅成比例扭转变形的恒幅比例弯曲试验，以及对S355J2WP合金钢在单轴恒幅下进行疲劳试验的结果。具有零和非零的平均应力值的随机载荷。根据Goodman，Gerber和Morrow提出的模型以及应力-应变参数，将测试结果与计算结果进行了比较。在基于应力的计算中，使用Huber-Mises关系将多轴应力状态减小为单轴应力状态。对于基于应变能密度的方法，利用应力-应变参数将多轴应力状态降低为单轴应力状态。剪切载荷的应力-应变参数达到最大值的平面被认为是临界平面。

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