Application of 2D inverse heat transfer to analyze mechanical fatigue

Document Type

Article

Publication Date

9-1-2025

Abstract

This study presents a novel approach for reconstructing localized heat sources associated with fatigue degradation in metallic materials using 1D and 2D Inverse Heat Conduction Problem (IHCP) techniques, integrated with a Finite Element Method (FEM) framework. Traditional fatigue analysis methods are often constrained in their ability to analyze complex geometries. To address these limitations, an approach is introduced that leverages the self-heating observed during cyclic loading to estimate plastic work rates and predict fracture locations. The 2D IHCP demonstrates superior accuracy in capturing variations in heat fluxes and identifying critical regions prone to crack initiation. Experimental validation tests using stainless teel (SS) 321 specimens are presented with thermal and stress analysis data supporting the effectiveness of the proposed methodology. The results indicate that the 2D IHCP method is highly effective in predicting plastic work rate, crack initiation onset, Fracture Fatigue Entropy (FFE), and provides a robust framework for analyzing fatigue in components with complex geometries.

Publication Source (Journal or Book title)

International Journal of Fatigue

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