讲座题目：Strength Evaluation of unidirectional CFRP with a local off-axis fibers array
报告人：Prof. Koichi Goda
时 间：6月29日（周二）下午3:30
地 点：力学楼434会议室
主持人：方岱宁（教授）
报告内容摘要：
CFRP (Carbon fiber reinforced plastics) exhibit superior mechanical properties, and are recently applied to large structural materials using the VaRTM(Vacuum assisted Resin Transfer Molding) method. In the vicinity of the resin inlet of this method, and at the joint of CFRP structures, it is pointed out that the disorder in fiber orientation often occurs. In this study, therefore, the effect of local off-axis fibers array on the tensile properties of unidirectional CFRP was basicall investigated. An experimental device for making a local off-axis fibers array on a CFRP lamina was newly developed, and various unidirectional CFRP laminae were prepared by changing the fiber orientation angle and the size. The results show that the tensile strength of CFRP laminae with off-axis fibers array decreases with increasing the fiber orientation angle and the length, and depends on the degree of fiber bundle waving. On the other hand, Young’s moduli of the CFRP lamnae show an almost constant value, which is relatively close to that of CFRP lamina without off-axis fibers array. Finally, Young’s moduli and tensile strength of the CFRP laminae were analyzed from a proposed composite model with an off-axis fibers array, and its validity was discussed.
报告人简介：
Professor, Materials Reliability Engineering Lab., Department of Mechanical Engineering, Yamaguchi University, Tokiwadai 2-16-1, Ube 755-8611, Japan
Education:Mar. 1980, Bachelor of Engineering, Hiroshima University, Hiroshima, Japan
Mar. 1982, Master of Engineering, Hiroshima University, Hiroshima, Japan
Nov. 1989, Doctor of Engineering, Hiroshima University, Hiroshima, Japan
Awards: Award of Encouragement by The Japan Society of Mechanical Engineers (1992) ,Award of Encouragement by The Society of Materials Science, Japan (1996) ,Excellent Paper Awards by The Society of Materials Science, Japan (1998)