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This is a Experimental Study study.

September 18, 2025Open Access

Synergistic Application of Heat Source Reconstruction and Second-Harmonic Thermoelastic Stress Analysis for Rapid Metal Fatigue Characterisation

Key Points

This combined approach enables rapid fatigue characterisation in 5052-H32 aluminium and SS304 steel specimens, improving assessment speed.
The assessment shows effectiveness by measuring nonlinear spectral responses through infrared thermography techniques.
Application of heat source reconstruction quantifies mechanical dissipation while analyzing stress responses across varying amplitudes.
The findings suggest adaptive techniques that may reduce the time and cost associated with conventional fatigue testing methods.

Abstract

The rise of metal additive manufacturing demands faster fatigue assessment, as conventional testing remains time-consuming and costly. This study applies a combination of infrared thermography-based techniques, Heat Source Reconstruction (HSR) and Second-Harmonic Thermoelastic Stress Analysis (SHTSA), under constant and continuously varying stress amplitudes, for rapid fatigue characterisation. HSR quantifies mechanical dissipation, while SHTSA assesses nonlinear spectral responses beyond thermoelastic coupling. Tests on 5052-H32 aluminium and SS304 steel specimens validate the integrated approach.

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Cite This Study

Omer et al. (Fri,) studied this question.

synapsesocial.com/papers/68d463e231b076d99fa62ff5 https://doi.org/https://doi.org/10.3390/proceedings2025129035

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