2923 BMCの曲げ疲労特性に及ぼす水環境の影響(S27-2 複合材料の動向とその加工技術(2),S27 複合材料の動向とその加工技術)
詳細
BMC (Bulk Molding Compound) is a popular engineering FRP and is used in Automobile or Electric instrument. Durability of BMC for machinery material was researched but the application of this material has been developed in more hard circumstance. In the situation, this material is sometimes exposed by cyclic load and hard circumstances such as water absorption and high temperature. In this report, the effect of water absorption on bending fatigue life has been researched considering the distribution of mechanical properties. The fatigue fracture mechanisms were studied by observation method. As a result, bending fatigue strength was decrease after immersion in water. Transverse crack density on side surface increased with decreasing stiffness ratio during bending fatigue test. It was found that glass fiber strand lingered in specimen by observing specimen.
