Abstract
In the present work, the effects of porosity on matrix-dominated mechanical properties of unidirectional carbon fiber reinforced plastic (CFRP) composites were evaluated by mechanical testing and X-ray computed tomography (CT). Four different levels of porosity in the CFRP material were achieved by implementing different manufacturing parameters. Samples taken from the plates, from which specimens were cut, were tested using X-ray CT to detect porosity. The quantification of porosity from the CT scans was performed using the VG Studio Max software. Four different mechanical tests were conducted, namely, transverse tension, 3-point bending, short beam shear and v-notched rail shear tests. The experimental results reveal that the presence of porosity degrades the transverse strength and shear properties of the CFRP material. The amount of degradation depends mainly on the volume fraction of the pores, however, in some cases, a dependence on the size of pores was found.
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