A micro-mechanical model for fibre bundle failure is formulated following a phase-field approach and is embedded in a semi-analytical homogenisation scheme. In particular mesh-independence and consistency of energy release rate for fibre bundles embedded in a matrix phase are ensured for fibre dominated failure. Besides, the matrix cracking and fibre-matrix interface debonding are modelled through the evolution of the matrix damage variable framed in an implicit non-local form. Considering the material parameters of both fibre and epoxy matrix phases identified from manufacturer data sheets, it is shown that the failure strength of a ply loaded along the longitudinal direction is in agreement with the reported values. Finally, the multi-damage homogenisation framework is applied to model, on the one hand, the failure of a notched laminate, in which case the failure modes are observed to be in good agreement with experiments, and, on the other hand, the failure of yarns in a plain woven composite unit-cell under uni-axial tension.

纤维束失效的微机械模型是按照相场方法制定的，并嵌入到半解析均化方案中。特别是对于纤维主导的故障，确保嵌入基质相中的纤维束的能量释放速率的网格无关性和一致性。此外，基体开裂和纤维-基体界面脱粘是通过以隐式非局部形式框定的基体损伤变量的演化进行建模的。考虑到制造商数据表中确定的纤维和环氧树脂基体相的材料参数，表明沿纵向加载的层板的破坏强度与报告值一致。最后，多损伤均化框架应用于建模，一方面是缺口层压板的失效，