Special Materials for Solve Deviations appeared in Mmanufacturing parts of CFRP and GFRP

• Autor(a) principal: Leveque, Francisco Coro
• Data de Publicação: 2020
• Tipo de documento: Dissertação
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10884/1482
• topic: CFRP; Composite materials; GFRP

Composites are materials increasingly used due to their characteristics and properties and the process Hand Lay Up is one of the most common process used in the word because it is a process that doesn’t need a high investment in machines as in other processes but it is mandatory to expend resources in research and development (R&D). When a part of composites is manufactured, typical deviations normally appear depending on the manufacturing process, geometry of the part, human factors, materials, etc... The process Hand Lay Up is a very slow process because the manual sheet placement stage consume about half of the total process time, and for this reason, the corrective actions to solve the deviations which appear during the cure cycle, should be taken in this stage, during the Hand Lay Up. As the name of the thesis shows: “SPECIAL MATERIALS FOR SOLVE DEVIATIONS APPEARED IN MANUFACTURING PARTS OF CFRP AND GFRP” the approach is showing how with some special materials it is possible to solve typical deviations that appear during the manufacturing process of a part of composites, and demonstrating how it is possible to decrease total cost by adding or modifying the typical material used in the process Hand Lau UP. The special materials used for eradicating the defects are ancillary materials. Ancillary materials are used only during the manufacturing process, but they do not remain incorporated to the part and are divided by two types: Material Type A and Material Type B. During the thesis, on one hand, we will analyze how is possible to solve defects of Lack of resin, surface porosity, delamination and excess of resin appeared during the manufacturing of Hollow Parts of GFRP using ancillary materials Type A, and on the other hand, defects of Porosity between layers, lack of resin and surface porosity appeared during the manufacturing of Planar Parts with special radius of CFRP using ancillary materials Type B. Finally, with a business case will be demonstrate how is possible to decrease total costs using these ancillary materials. In one case replacing conventional materials used during the performing of the vacuum bag and in other case adding a new material.