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首页> 外文会议>Materials Science Technology Conference and Exhibition >UNCERTAINTY AND SENSITIVITY ANALYSIS IN FATIGUE LIFE OF WELDED JOINT USING CRYSTAL PLASTICITY SIMULATIONS
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UNCERTAINTY AND SENSITIVITY ANALYSIS IN FATIGUE LIFE OF WELDED JOINT USING CRYSTAL PLASTICITY SIMULATIONS

机译：晶体塑性模拟焊接关节疲劳寿命的不确定性与敏感性分析

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A numerical framework has been developed to predict fatigue life of welded joints by using crystal plasticity finite element method. The purpose of the present study is to evaluate the uncertainty propagation and the sensitivities of various input parameters on fatigue life using the developed numerical framework. Probability distributions of shape and microstructural parameters in welded joints were obtained from experimental data. The fatigue crack initiation life was stochastically evaluated by inputting these parameters to the physical models. A global sensitivity analysis was performed in order to quantify the influence of the shape and microstructural parameters on the fatigue life. The model considering the effect of microstructural distribution showed larger scattering in the fatigue crack initiation life than the macroscopic model.
机译：已经开发了一种数值框架，通过使用晶体塑性有限元方法来预测焊接接头的疲劳寿命。本研究的目的是评估使用开发的数值框架的各种输入参数对疲劳寿命的不确定性传播和敏感性。实验数据获得焊接接头形状和微结构参数的概率分布。通过将这些参数输入到物理模型来随机评估疲劳裂纹启动寿命。进行全局敏感性分析，以量化形状和微观结构参数对疲劳寿命的影响。考虑到微观结构分布的效果的模型在疲劳裂纹引发寿命中显示出较大的散射而不是宏观模型。

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