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Fatigue life estimation of components with use a non-linear energy model coupled a finite element method

机译:使用非线性能量模型结合有限元方法估算零件的疲劳寿命

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The work presents a non-linear fatigue computation method together with finite element method, in which energy parameter has been used. The Proposed model has been used for simulation computations, based on experimental testing of Al-2024 aluminum alloy specimens subjected to two types of loads, i.e. variable blocs loading and random loading. Computations of energy parameter value have been donebased on the results of FEM elastic–plastic analysis of cyclic properties of a material.A computing Matlab-based algorithm of the fatigue life prediction methodology was developed. The proposed damage indicator is connected cycle by cycle to the W?hler curve. Cycles were counted with the rain-flow algorithm, and damage was accumulated with this model and with the Palmgren–Miner rule. On the grounds of which fatigue life has been read off from only characteristics of specimens. An experimental verification shows a satisfactory agreement between the fatigue life calculation results by the proposed methodology and test results. Estimated and experimental lives are found to exhibit good agreement.
机译:这项工作提出了一种非线性疲劳计算方法以及有限元方法,其中已经使用了能量参数。基于对Al-2024铝合金试样进行两种类型的载荷(即可变块载荷和随机载荷)的实验测试,该提议的模型已用于仿真计算。基于材料的循环特性的有限元弹塑性分析结果,完成了能量参数值的计算。开发了一种基于Matlab的疲劳寿命预测方法的计算算法。拟议的损坏指标是逐周期连接到W?hler曲线的。使用雨流算法对循环进行计数,并使用该模型和Palmgren-Miner规则累积损伤。基于这种疲劳寿命,仅从试样的特性中即可得出。实验验证表明,所提出方法的疲劳寿命计算结果与测试结果令人满意。发现估计寿命和实验寿命显示出良好的一致性。

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