靭性を強化した複合材曲がり梁の層間強度

概要

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Various toughened-material systems to reinforce interlaminar strength of CFRP have been proposed on the basis of the results of coupon tests. In this paper, an applicability of toughened-material systems to structural model such as curved beam subject to static bending was examined. Two kinds of CFRP with different toughened-material system were selected, and both microscopic observation and numerical FEM simulation using VCCT were performed for test results. A difference between coupon and structural model tests was found for the case of the curved beam with artificial anomaly, and the cause was considered due to the difference of delamination pass between coupon and curved beam tests. From a view point of numerical simulation for predicting the strength behavior of the curved beam, an adoption of different fracture toughness from that by coupon test was necessary.