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Analysis of temperature gradients in thin-walled structures under thermomechanical fatigue loading conditions
International Journal of Fatigue ( IF 6 ) Pub Date : 2022-09-22 , DOI: 10.1016/j.ijfatigue.2022.107254
Jiawei Xu, Huang Yuan

In recent thermal gradient mechanical fatigue (TGMF) investigations, it is verified that the material fatigue lives are significantly affected by the temperature gradients. Determination of temperature gradients of thin-walled structures is always a difficult task. In the present work, tubular specimens were experimentally and computationally investigated under different conditions. The inverse heat conduction (IHCP) method was improved to predict the inner boundary from external measurements. Two models were finally developed, based on direct IHCP or modified Nusselt number estimation. The models are qualified to acquire temperature gradients in TGMF experiments with reasonable accuracy and versatility.



中文翻译:

热机械疲劳载荷条件下薄壁结构的温度梯度分析

在最近的热梯度机械疲劳 (TGMF) 研究中,证实材料疲劳寿命受到温度梯度的显着影响。确定薄壁结构的温度梯度始终是一项艰巨的任务。在目前的工作中,管状试样在不同条件下进行了实验和计算研究。改进了逆热传导(IHCP) 方法,以根据外部测量预测内边界。基于直接 IHCP 或改进的努塞尔数估计,最终开发了两个模型。这些模型有资格在 TGMF 实验中以合理的准确性和多功能性获取温度梯度。

更新日期:2022-09-22
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