Procedimento para análise numérica do impacto de baixa velocidade em material compósito

Abstract

Fiber-reinforced polymer composites have been used in most engineering structures, they are materials of complex behavior, largely due to fiber-induced anisotropy. The growing use of the composite in industry can be explained by several benefits, such as great resistance to corrosion, low structural weight, great mechanical resistance, and ease of forming for complex geometries. These materials have a brittle behavior, so that when subjected to impact, their mechanical properties can undergo sensitive changes, and there may be multiple failure modes that interact with each other, compromising its structural strength and thus its use. This work aimed at the elaboration of a reliable numerical procedure, to be validated by comparing its results with those existing experiments in the literature, for the identification and analysis of failures present in a composite laminate, especially material failure due to delamination, caused by low velocity impact. The model was built with the resources available by the LS-DYNA and LS-PrePost software. Thus, the finite element analysis model contemplates the laminate under the impact of an indenter, similarly to the test that uses a drop weight machine.