Influência do intemperismo sobre o desempenho mecânico de compósitos PEI/ Fibra de vidro com aplicações aeronáuticas

• Autor(a) principal: Penteado, Mariana de Barros [UNESP]
• Data de Publicação: 2014
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/203732; http://www.athena.biblioteca.unesp.br/exlibris/bd/capelo/2019-10-16/000924625.pdf
• topic: Compósitos poliméricos; Fibras de vidro; Materiais compostos; Polymeric composites

The main objective of this work is to analyze the influence of weathering on the mechanical properties of poly (ether-imide) / glass fiber composites. In order to achieve this objective, test specimens of this laminate were conditioned in hygrothermal, UV radiation, salt spray and thermal shock chambers. In a second step, the effect from these conditions were evaluated by optical microscopy and mechanical tests of traction and shear interlaminar. The innovation of this project, when compared to the results available in the literature, is in two main points: systematic evaluation on the influence of sudden temperature variations and the use of thermography techniques during the tensile tests, which will allow the evaluation of the voltages generated during this test. Nevertheless, the other conditions are also necessary since there is still no consensus in the literature about the real effects resulting from these conditions. From this work it can be concluded that the decrease in interlaminar shear strength after the etchings was small for the hygrothermal and thermal shock, intermediate to UV radiation for 600 hours reasonably high for the salt spray. However, the decrease in tensile strength was low after UV, salt spray and hygrothermal conditioning and there was no change in thermal shock. With the FT-IR analysis, the UV radiation results showed that the composite does not lose its structural integrity