Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : November 18, 2020 - November 20, 2020
In order to investigate the effect of ply thickness and stacking order on the mechanical properties of CFRP laminates, five different laminates were prepared using two different types of prepregs with different layer thicknesses. All the laminates were cross-ply and only the stacking order was changed. Static tensile tests, tensile fatigue tests, and DMA tests were conducted for evaluation of their mechanical properties. In the tensile tests, it was found that the tensile strength was higher for the thin-ply laminates than that of conventional laminates. There was no difference in tensile strength due to the stacking configuration. Fatigue tests also showed that the thin-ply laminates had low fatigue strength at high cycle fatigue. In particular, the thinnest configuration laminate showed a significant reduction in fatigue strength, and the fracture morphology of the thinnest configuration laminate was different from that of the other laminate as observed by the microscope. In the DMA test, no difference due to ply thickness or stacking order was observed.
