Title of Paper:基于有限元法和锁相热像法对含缺陷构件的应力分析与疲劳性能评估

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Date of Publication:2022-06-28

Journal:材料工程

Issue:8

Page Number:62-71

ISSN No.:1001-4381

Abstract:The relationships between the stress concentration factor Kt with the depth h and diameterφof the blind hole were investigated based on the FEM .The thermo‐elastic analysis mode (E‐Mode) built‐in the lock‐in thermography was utilized to study the stress distribution around the blind hole , and to predict the variation of Kt of different depth .Good predictions were achieved between the ther‐mography and FEM .The variations of the intrinsic dissipation and the temperature signal during fa‐tigue process were studied respectively using the dissipation mode (D‐Mode) of Altair Li and Altair software ,to evaluate fatigue damage evolution .These two signals were considered as fatigue damage markers to rapidly predict the fatigue limit and the fatigue notch factor Kf of the component with blind hole .T he theoretical result validates the capability of the lock‐in thermography .

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