Simulation And Analysis Of Single Fibreglass Pull-Out Test With FEM

Based on the single fiber representative volume element of fiber reinforced composites, the single fibre pull-out test of Fiberglass/Cement composites were numerically simulated by using finite element code ANSYS and considering different embedment length. According to experimental data of Fiberglass/Cement composites, the numerical simulation is reasonable. The effect of graft on the single fibre pull-out of the composite was discussed. The results show that the epoxy resin graft has a great effect on the interfacial shear strength and failure mode. Compared with no graft, the interfacial shear strength results indicated that the Smooth epoxy graft improves by 30% and the Rough grafted epoxy resin improves by 90%. Failure mode has a relationship with the graft. The interfacial failure modes lead to Fiberglass of non-grafted pull out, the cement failure modes lead to Fiberglass of epoxy resin graft pull out. Based on the results of micro-experiments for fiber/matrix interfaces, the single fibre pull-out tests of Fiberglass/Cement composites were numerically simulated by using finite element code ANSYS and the method of element birth and death. The load-displacement curves were obtained for perfectly bonded interfaces and non-perfectly bonded interfaces. The influences of smooth and rough epoxy graft on the interfacial shear strengh of Fiberglass/Cement composites were discussed. The results show that epoxy graft not only has good interfacial combination, but also has good mechanical embed effects. The results are useful to study the failure mechanism of fiber reinforced composites. Moreover, based on the numerical results, the failure mode and its evolution features were also discussed.