面外衝撃を受けるFW-CFRP積層板の損傷許容性に関する実験的および解析的評価

抄録

Purpose of this study is to investigate fracture mechanisms and an influence of impact load on mechanical properties of shoulder part of composite pressure vessels experimentally and analytically. CFRP laminates which were simulated as shoulder part of composite pressure vessels, were made by FW method and were subjected to out-of-plane impact load. Impacted specimens were inspected by cross-sectioning and X-ray photography. Tensile tests were carried out on some specimens. Finite element analysis that simulates the impact test was also conducted. The experimental results showed that the impact load induced matrix crack, delamination, and splitting. Tensile strength was slightly reduced by impact loading. From the result of finite element analysis, dominant stress component for initiation of damage on backface of laminate was suggested as τ_xz.