Phase field predictions of microscopic fracture and R-curve behaviour of fibre-reinforced composites

We present a computational framework to explore the effect of microstructure and constituent properties upon fracture toughness fibre-reinforced polymer composites. To capture microscopic matrix cracking fibre-matrix debonding, couples phase field method cohesive zone model in context finite element method. Virtual single-notched three point bending tests on fibre reinforced composites are conducted. The actual composite is simulated by an embedded cell process zone, while remaining area homogenised be anisotropic elastic solid. A detailed comparison predicted results with experimental observations reveals that it possible accurately crack path, interface debonding load versus displacement response. sensitivity growth resistance curve (R-curve) determined. influence porosity R-curve also explored, revealing higher increasing void volume fraction. These shed light into mechanisms set basis for efficient design high