As part of the final work, we covered the literature based on composites their properties and manufacturing procedures, we got acquainted in detail with two technological procedures fort the production of composite materials with aim of determining the impact of manufacturing technology on shear strength.
Shear strength testing was performed on cut-out samples from two plates, made of carbon fabric and epoxy resin, with the same surface dimensions, the same fiber placement, the same materials, and with two different manufacturing processes. The samples were tested for shear strength, using a tree-point shear test, according to standard ASTM D 2344. We found out that the samples, made with vacuum infusion with additional compression in an autoclave withstand higher shear strength, compared to wet/hand lay-up. The surface porosity and microstructure of the samples were then analysed with microscope, where it was found that the composite made by vacuum infusion withstands higher shear strength because of minor porosity and less flaws, which are entered by process of wet/hand lay-up lamination.