섬유강화 복합재료의 强度에 습기가 미치는 影響

The Moisture Affects in the Strength of the Fiber-Reinforced Composite Material

The purpose of this investigation is to estimate the strength with the variations of shape and the adhesive condition at the fiber/matrix micro interface of E-glass/PP laminates. To promote the degradation of the adhesive condition at the fiber/matrix micro interface without matrix dissolution loss, low-, hot-wet and spiking tests were carried out. The absorption properties and the tensile properties were compared according to the fiber orientation and the content. The results show that, firstly, saturated moister absorption was reached at 5cycle and their absorptions of RD-40, UD-42, and UD-50 are 0, 0.63%, 0.60%, respectively. Secondly, all the specimens investigated were mostly degraded at 5cycle, whereas UD-50 having ellipse shaped ellipse the least decrement of strength.