聚合物及其复合材料多场耦合损伤本构 模型研究进展

Polymers and their composites, with excellent mechanical properties and high designability, are widely used in traditional engineering and emerging fields. However, exposure to complex multi-field coupled environments (e. g., hygrothermal conditions, chemical corrosion, electromagnetic radiation, and cyclic loads) can induce nonlinear behaviors in materials, such as performance degradation and anisotropic damage evolution. This paper first sorts out several classical polymer constitutive models and analyzes their advantages and limitations. Secondly, it focuses on the research progress of composite damage constitutive models under multi-field coupling, elaborating on the model construction approach, definition of damage internal variables, micro-macro mechanisms of damage evolution, and quantitative characterization methods for coupling effects, with emphasis on the analysis of the advantages and disadvantages of continuum damage mechanics in describing multi-field coupling and cross-scale damage behavior. Finally, it prospects the key future research directions of composite damage mechanics, providing references for theoretical breakthroughs and engineering applications in related fields.