Failure phenomena in fibre-reinforced composites. Part 6: a finite element study of stress concentrations in unidirectional carbon fibre-reinforced epoxy composites

The effect of temperature on stress transfer between a broken fibre and the adjacent fibres in unidirectional fibre composites

“…In this study, the magnitude of the calculated SCF value obtained at room temperature (Table 3) is higher than those reported in other studies [8,[21][22][23] where matrix elasto-plasticity was included in the models. This can be explained by the redistribution of the overload from a broken fibre among a larger number of intact neighbouring fibres in those studies.…”

“…The elasto-plasticity of the matrix has been incorporated into finite element models by other authors [21,22] and led to a significantly lower strain concentration factor in comparison to the elastic case. In contrast, it has been shown elsewhere [23] that matrix plasticity resulted in a slight decrease in the SCF and it was concluded that the SCF was mainly affected by the number of surrounding fibres.…”

“…Van den Heuvel et al [23] introduced a 3D finite element model which included an element of full UD composite around a fibre-break similar to the model of Nedele et al [20] and obtained considerably lower stress concentration factor compared to their previous 2D planar model [24].…”

Influence of Interfacial Properties on Crack Propagation in Fiber‐Reinforced Polymer Matrix Composites

“…However, due to the strong stress-transfer effect of the interface and matrix with no interface debonding, the further distance away from the fiber break, the better is the load-bearing capacity of the broken fiber. [13] L. Sun, Y. Jia, F. Ma, J. Zhao, C. C. Han Figure 6. Final fracture process of a multi-fiber model composite with weak interface (the surface of the fiber is urethane-sized) at strains: a) 5.6, b) 7.0, c) 7.3%, and d) fracture.…”

“…Microdamage analysis of fibrous composites has received considerable attention in recent years. [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] Herrera-Franco et al studied radial stresses at the interface during the fiber pulled out from the droplet using FEA analysis. [5] Sirivedin et al derived an analytical expression to estimate the…”