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The influence of the matrix properties on mechanical properties of a glass fiber reinforced polymer made by the infusion method

Bieńczak Rafał, Janiszewski Jacek, Komorek Andrzej, Łusiak Tomasz, Krasuski Kamil, Wasilewski Szymon

Advances in Science and Technology. Research Journal

2025

Vol. 19, no. 4

206--219

At every stage of the development of modern aerospace structures, engineers are keen to obtain the lightest possible product while maintaining high strength. In order to meet such requirements, composite materials are now widely used in the aerospace industry, with manufacturing methods constantly evolving. This thesis aims to investigate and analyze the influence of the matrix on the strength of a layered composite made using the infusion method. This method is currently among the most popular and effective ones. The technique makes it possible to produce a robust laminate using optimum labour and favourable costs. However, a number of rules must be followed during the production process to produce a satisfactory product. In relation to the objective of the thesis, three different composites were produced and tested, differing in the properties of the used resin composition. The matrixes were different in terms of the use of processes such as degassing and the ratio of epoxy resin to hardener. During the research, tensile strength, impact strength and bending tests were carried out. This work shows that on the basis of the results obtained from the strength tests and observations of the internal and external structure of the tested materials, it can be concluded that the ratio of resin and hardener has little effect on the strength properties of the material. The results also show that the specific conditions of composite production by the infusion method greatly affect the spontaneous degassing of the resin mixture.