S0406-1-4 高サイクル疲労負荷下におけるCFRPクロスプライ積層板のトランスバースクラック発生(プラスチック基複合材料の加工と評価(1))

概要

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In this study, initiation of transverse crack for CFRP cross-ply laminates was investigated at various stress levels during high-cycle fatigue tests. Internal damages were observed with soft X-ray photography at arbitrary loading cycles. A variation of transverse crack density and the local delamination length was evaluated as the fatigue damage progression. The stress in 90° layer considering local delamination length was calculated with a variational approach from the experimental data. It was clear from the results that as the applied maximum stress is set to lower, the saturated transverse crack density and 90° layer stress also lowers. Moreover, the fatigue limit of transverse crack initiation is indicated in this fatigue test conditions.
2009-09-12