Abstract
This paper presents the results of the experimental investgation of the static and dynamic mechanical properties of laminated carbon fiber reinforced plastics (CFRP). The composites consist of denatured epoxy resin MRX-3501, # 241, # 3130 and reinforced high strength type carbon fiber, PYROFIL-XAS made by Mitsubishi Rayon Co., CARBOLON Z-3 by Nippon Carbon Co., and TORAYCA T-300 by Toray Co. These Laminated CFRP plates were fabricated with 24 plies of [0°, 45°, -45°, 90°] sym. laminates; symmetry of plies is about the laminate midplane. Flexural fatigue test results on normal test pieces and on hydrated test pieces soaked in water for two weeks were compared. The results of flexural fatigue tests showed the ratio of the flexural fatigue strength at 107 cycle to the static flexural strength to be 0.27-0.43. The fatigue strengths of normal test pieces not differ from that of hydrated test pieces in XAS/MRX-3501 and Z-3/# 241; however, they slightly differ in T-300/# 3130.
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