Relevance of the study lies in the need to develop and improve reliable methods for predicting the service life of composite structures. A comparative analysis of various approaches to modeling the degradation of composite material properties was carried out, with particular attention paid to the Dudchenko–Lurie model. The research methodology is based on a phenomenological approach using experimentally established relationships between loading parameters and material property changes. Mathematical modeling of the damage accumulation process was performed, taking into account both mechanical and thermal effects. The results demonstrate a significant influence of thermal factors on the effective characteristics of composite structures. The effectiveness of the modified degradation model, which incorporates thermal effects via the Duhamel–Neumann relations, was demonstrated. It was also found that the Dudchenko–Lurie model requires considerable computational effort for certain composite layup types. Practical significance of the work lies in the possibility of using the developed methodology to predict the service life of composite structures under combined mechanical and thermal loading. The results of the study can be applied in the design of aerospace engineering components.

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