101 モード II 変形を受ける FRP のき裂先端での微視的損傷過程の有限要素解析による検討

概要

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A finite element analysis was carried on microscopic fracture process of the matrix resin layer in FRP laminates for the mode II interlaminar fracture. The analysis revealed the following microscopic fracture process. (i) First, the microcrack initiated at the main crack tip owing to the principal stress followed by successive microcracks at even intervals with increasing the shear strain. (ii) Then, the delamination at the interface between fiber and the matrix initiated at the forthermost microcrack from the crack tip and propagated towards the crack tip owing to the shear stress. (iii) Finally, microcracks were connected by delamination. The effects of the matrix resin layer thickness and the fiber mechanical properties on the interval of microcracks were also investigated. The interval of microcracks was linearly correlated with the matrix resin layer thickness and was not affected by the fiber mechanical properties.
社団法人日本機械学会の論文