Thermo-Mechanical Behavior of Composite Laminates

Composite laminates, composed of layered anisotropic materials, exhibit complex interactions between thermal and mechanical fields. Thermal loading induces uneven expansion or contraction across plies, while moisture ingress can further modify stiffness and provoke hygroscopic swelling. The resulting stress gradients often localise at ply interfaces and edges, potentially initiating delamination or fatigue. Accurate prediction of thermo‐mechanical response is essential for applications in aerospace, automotive and civil engineering, where composite structures experience wide temperature ranges and environmental exposure. Advanced computational models now integrate three-dimensional elasticity, transient heat conduction and diffusion laws to capture through‐thickness temperature and moisture profiles. Such models account for ply orientation, material heterogeneity and boundary conditions to assess displacement, stress and damage initiation. Experimental investigations complement numerical analyses, revealing the influence of ply stacking sequences and surface treatments on thermal stress redistribution and long‐term dimensional stability. Recent developments focus on multi‐physics coupling, enabling design optimisation for thermal barrier and moisture-resistant composite systems with improved resilience under cyclic hygro‐thermal loading.

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Thermo-Mechanical Behavior of Composite Laminates publication trend

The graph below shows the total number of articles in thermo-mechanical behavior of composite laminates across all publications each year (not limited to Nature Index journals).

Technical terms

Composite laminate: A multi‐layered material with different fibre orientations or materials combined to achieve tailored mechanical and thermal properties.

Thermo‐mechanical coupling: Interaction between temperature changes and mechanical deformation, including stresses induced by thermal expansion or contraction.

Hygro‐elastic model: A computational framework that couples moisture diffusion with elastic deformation to predict stresses and displacements.

Functionally graded material (FGM): A composite with gradually varying composition or structure through the thickness, designed to reduce stress concentrations and tailor thermal responses.

Exponential matrix method: A numerical technique for solving linear differential equations, employed here to integrate through‐thickness field variations efficiently.

Shear deformation theory: An advanced plate or shell theory accounting for transverse shear strains, improving the accuracy of stress and displacement predictions in thick laminates.

References

1. Hygro-Elastic Coupling in a 3D Exact Shell Model for Bending Analysis of Layered Composite Structures. Journal of Composites Science (2023).
2. Heat conduction and Thermal Stress Analysis of laminated composites by a variable kinematic MITC9 shell element. Curved and Layered Structures (2015).
3. A coupled hygro-elastic 3D model for steady-state analysis of functionally graded plates and shells. Curved and Layered Structures (2023).