Cure treatment influence on residual characteristics after impact in hybrid composites

摘要

Epoxy and hybrid fabric of aramide and glass fiber was used to obtain quasi-orthotropic composite laminates. They were characterized to flexion and their residual characteristics were determined after impacts from 2 to 8 J. The choice of curing conditions was found to be determinant in the mechanical characteristics. It could be verified that there is one alternative cure treatment in time and cost to the proposed one by the resin manufacturer for the consolidation of the laminate. The incidence of the impact was pronounced barely to low energies and it was able to establish a threshold level of damage surrounding to 2 J. The losses in elastic modulus were moderate and lightly influenced by the cure treatments. Losses of flexural strength were important and dependent with the cure treatment.