Aquino, Eve Maria Freire deTargino, Talita Galvão2018-09-062018-09-062018-08-02TARGINO, Talita Galvão. Estudo do comportamento mecânico em compósito polimérico a base de tecido híbrido. 2018. 99f. Dissertação (Mestrado em Engenharia Mecânica) - Centro de Tecnologia, Universidade Federal do Rio Grande do Norte, Natal, 2018.https://repositorio.ufrn.br/jspui/handle/123456789/25788The study of the mechanical behavior of laminated composites generally presents difficulties in their development, especially with respect the effect of the anisotropy (fibers orientation influence in relation to the applied load direction) and presence of geometric discontinuities such as holes and/or notchs, thus the need for more detailed studies that determine accurately these influences. In this sense, the main objective of the present work is to determine the mechanical properties (as well as the residual properties) as well as the characteristics of the mechanical fracture of a reinforced laminated composite with four fabric layers of Kevlar/49 fibers and glass fibers/E, using the Orthophthalic Polyester resin as matrix. The entire study is performed against the uniaxial tensile test. Two distinct specimens are studied involving the fibers orientation with respect to the direction of the load application: 0°/90° and ±45°. In the case of specimens with orientation 0°/90° and with presence of geometric discontinuity (central hole), the influence processes different used to obtain these holes (milling and water jet) in the mechanical behavior of the laminate is also studied. The results showed that specimens with fibers oriented at 0°/90°, independent of the conditions studied, presented higher values of strength and stiffness in relation to test specimens with ± 45° oriented fibers. In relation the mechanical response, specimens with geometric discontinuity and at 0°/90 °oriented fibers, there was loss of load bearing capacity, while the process of obtaining the hole in these specimens did not significantly influence the results obtained. For test specimens with geometric discontinuity and ± 45° oriented fibers, results showed no loss in strength and stiffness of the material.Acesso AbertoCompósitos híbridosPropriedades mecânicasFratura mecânicaFuro centralEstudo do comportamento mecânico em compósito polimérico a base de tecido híbridoStudy of mechanical behavior in polymeric composite based on hybrid fabricmasterThesisCNPQ::ENGENHARIAS::ENGENHARIA MECANICA