Modelo analítico de impacto em material composto aplicado ao projeto de capacetesIn this work, the energy and stress necessaries to cause permanent damage to a small-scale helmet surface made by composite materials have been investigated. The helmets made by lamination of epoxy resin with glass, Kevlar, carbon and jute fibers were submitted to an impact test based on the Snell M2005 testing procedure. The experimental results were paired up with the predicted values by the mathematical model. From the tendency observed on the result data, the material behaviour can be predicted successfully by the proposed model at the tested conditions.
Neste trabalho foram analisadas matematicamente as energias e tensões necessárias para causar dano permanente à superfície de um capacete em escala fabricado em materiais compósitos. Os capacetes confeccionados a partir da laminação de resina epóxi com fibras de vidro, Kevlar, carbono ou juta foram submetidos a um ensaio de impacto baseado na norma Snell M2005. Os resultados experimentais foram confrontados com os previstos pelo modelo matemático proposto. Observou-se, a partir da tendência dos resultados que o comportamento do material pode ser previsto de modo satisfatório pelo modelo proposto nas condições testadas.
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