Abstract
A trade-off problem between cost reduction and reliability enhancement becomes great issue for practical use of Fiber Reinforced Plastics (FRP). Defects formation in resin is inevitable in manufacturing and use. A quantitative estimation of strength degradation caused by defects is indispensable for logical solution of the trade-off problem. We employ meso-scale model, which handles fiber bundle and resin separately, to clarify the effect of the defect to ultimate strength through damage propagation simulation in resin/fiber bundle system. In this study, we reveal acceleration effect of spherical defect and cylindrical defect imitating bubble and crack, respectively, to fibers break by means of the damage simulation with the meso-scale model.
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