318 スプリットホプキンソン棒法による動的破壊靭性試験への境界要素法の適用

概要

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In the present study, boundary element method is applied to the evaluation of interlaminar fracture toughness of CFRP composite. The dynamic fracture toughness of CFRP was measured by split Hopkinson bar method, where the dynamic three point bending tests were carried out using short-beam-type specimens with end notch. In order to evaluate the dynamic deformation of CFRP laminates, Laplace-transformed BEM scheme was employed for the numerical computation, and the extrapolation scheme was applied to obtain the stress intensity factor (SIF) of Mode II in the unidirectional CFRP laminates. The basic formulation of BEM analysis for the anisotropic body of CFRP is introduced, and the experimental results of dynamic fracture toughness obtained from SHPB test and BEM analysis are discussed.
一般社団法人日本機械学会の論文
2003-08-05