Effect of Process Parameters on Epoxy Flow Behavior and Formability with CR340/CFRP Composites by Different Laminating in Deep Drawing Process

Abstract

Hybrid composite material was fabricated by stacking CFRP (carbon fiber–reinforced plastic) on CR340 plates to increase the specific strength and specific stiffness, compared to stacked composites by different laminating method. A deep drawing test was conducted for this hybrid composite material by using various process parameters, to assess its formability and potential use in vehicle parts. The experimental results showed that with low blank holding force, the forming depth of the CR340/CFRPR* composites was higher than the forming depth of CR340/CFRP. On the other hand, when the blank holding forces were increased to 30 and 90kN, the forming depth of CR340/CFRP and CR340/CFRPR* composites were almost same. As the punch velocity increased, CFRP flowed abruptly toward the round part of the die. The thinning rate in each position of the drawing product and the problems encountered during the deep drawing process were reviewed by a comparison of the experiment results.