J043022 引張負荷を受けるCFRPアングルプライ積層板の損傷力学解析([J04302]高分子基複合材料の加工と評価(2))

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This paper deals with mechanical property and damage evolution in CFRP symmetric angle-ply laminates with different ply thickness. Usually, CFRP is made by laminating the fiber direction in many directions. So, it is important to understand effect of ply thickness on mechanical property and damage evolution of CFRP laminates. T700SC/2500 carbon/epoxy laminates with stacking sequence of Rア45)12b, [(ア67.5)121s (t-0.05mm prepregx48plies), R-45)4/(+45)4is, [(-67.5)4/(+67.5)4], (t-0.15mm prepregx16plies) are used as specimens. It should be noted that the laminate thickness is almost the same, but the ply thickness are quite different. In 48-ply specimen each thickness of 45 and -45 ply is 0.05mm. Meanwhile, in 16-ply specimen, the ply thickness is 0.6mm if each (+45)4 or (-45)4 ply is regarded as one blocked ply of +45 or -45 ply. In this regard, the one ply thickness in 48-ply specimen is 12 times thinner than that in 16-ply specimen. Monotonic tensile tests are performed to understand fundamental mechanical properties of each laminate. And we estimate damage evolution from mesoscale damage model with loading-unloading tensile test results. 48-ply specimen has been found to exhibit high fracture strain and strength in comparison to 16-ply specimen.
一般社団法人日本機械学会の論文
2011-09-11