Effects of Fiber Waviness on Elastic Properties of Composites and New Fabrication Method for Composites with Uniform Fiber Waviness

굴곡진 보강섬유가 복합재료의 기계적 특성에 미치느 영향과 일정한 보강섬유의 굴곡비를 가지는 복합재료의 성형방법에 관한 연구

A constitutive model was proposed to study the effects of fiber waviness on the elastic properties of unidirectional composite materials. The predictions showed that the degree of fiber waviness significantly affected the elastic properties of composite materials. A special fabrication technique was developed for thic composite materials with various fiber waviness ratios. Tensile, compressive and flexural tests were conducted to obtain the elastic properties of composite materials with fiber waviness experimentally. The experimental result were in good agreement with the predictions.