A 3D mathematical model was established for the investigation of the thermomechanical behavior of aluminumalloys (Al-7075) under the combined action of tensile loading and laser irradiations. The transient temperaturefields and stress-strain field was obtained by using the finite element method. The Johnson–Cook's constitutiveequation is implemented in the FE model to study the failure behaviour of alloy. The effects of various pre-loadingand laser power densities on the failure time, temperature distribution and the deformation behavior of aluminumalloys are analyzed. The results indicate the significant reduction in failure time for higher laser power densitiesand for high preloading values, which implies that preloading may contribute a significant role in the failure of thematerial at elevated temperature. The numerical result agrees well with our previous experiment results, concludingthat the numerical model is reasonable.
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