engleski

Modelling of micro-damage and intrinsic self-healing in unidirectional CFRP composite structures

This work presents a micromechanical constitutive model of an intrinsically self-healing unidirectional CFRP composite material. The model is implemented into Abaqus/Standard user material subroutine UMAT and validated using experimental results of three-point bending tests available in the literature. Tested specimens consist of thermally mendable bis-maleimide tetrafuran (2MEP4F), and GA045 unidirectional carbon fibres. The matrix material is modelled using the elastic- plastic micro-damage-healing constitutive model. On the other hand, the reinforcing fibres are modelled as linear elastic. A three-dimensional micromechanical model, based on principles of the Rule Of Mixtures, is employed to model the homogenised composite. Finally, a parametric analysis is conducted to evaluate the effect of various parameters on the damage evolution and the healing performance, and afterwards, the results are discussed. The validation results have shown that the developed constitutive model is able to accurately simulate the micro-damage and healing processes in the intrinsically selfhealing unidirectional composite structures.

Micromechanical self-healing constitutive model ; Rule of mixtures ; Unidirectional self-healing composite ; Intrinsic healing

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