CAJ | 학술논문

孔隙的存在是炭纤维复合材料层压板加工过程中不可避免的缺陷,并且会对炭纤维复合材料结构的性能产生很大的损害.针对[(±45°)/(0,90°)_2/ (±45°)]_S炭纤维复合材料层压板,详细分析了层压板内孔隙的尺寸、形状及分布特征.通过施加不同的固化压力制备了不同孔隙率含量的试件.采用显微图像分析技术和性能测试对炭纤维复合材料层压板内孔隙的形态及其对炭纤维复合材料层压板力学性能的影响进行了研究,采用图像分析软件对孔隙的形状和尺寸进行了定量的表征.结果表明,对于铺层为[(±45°)/(0,90°)_2/ (±45°)]_S层压板,孔隙主要分布于层间,且都沿着平行于铺层的方向发展.随着固化压力的减小,孔隙率增大、层间剪切强度和压缩强度下降.
공극적존재시탄섬유복합재료층압판가공과정중불가피면적결함,병차회대탄섬유복합재료결구적성능산생흔대적손해.침대[(±45°)/(0,90°)_2/ (±45°)]_S탄섬유복합재료층압판,상세분석료층압판내공극적척촌、형상급분포특정.통과시가불동적고화압력제비료불동공극솔함량적시건.채용현미도상분석기술화성능측시대탄섬유복합재료층압판내공극적형태급기대탄섬유복합재료층압판역학성능적영향진행료연구,채용도상분석연건대공극적형상화척촌진행료정량적표정.결과표명,대우포층위[(±45°)/(0,90°)_2/ (±45°)]_S층압판,공극주요분포우층간,차도연착평행우포층적방향발전.수착고화압력적감소,공극솔증대、층간전절강도화압축강도하강.
The existence of the voids is detrimental for the structure performance of composites. The size, shape and distribution of voids in the [(±45°)/(0,90°)_2/ (±45°)]_S carbon fiber reinforced composite laminates used for the aircraft were analyzed. Different void contents were acquired by applying a series of curing pressures. Ultrasonic C-scan and microscopic image analysis were used to study the morphology of voids in the fiber reinforced composite laminates. Quantitative characterization of voids in terms of void size and shape was carried out through image analysis software. The results show that voids are mainly distributed between the layers in [(±45°)/(0,90°)_2/(±45°)]_S laminates, which grow up along the direction parallel to plies. The void content increases, but the interlaminar shear strength (ILSS) as well as compress strength decreases with the decrease of curing pressure.