ガラス長繊維強化ポリウレタンフォームの耐き裂抵抗性に関する研究 : 第2報 : コンパクト・テンション試験による評価

概要

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The purpose of this study is to make a quantitative evaluation of the effect of glassfibers on the increased crack resistance performance of reinforced PUF (polyurethane foam), which was developed to meet the requirements of insulation material for the TGZ Mark III cargo containment system of LNG carriers. In this report, the crack extension behavior and the fracture toughness of reinforced PUF (R-PUF) have been examined based on compact tension tests at room and low temperature in comparison with those of non-reinforced PUF (G-PUF) following the first report, in which the three-point bending test results at room temperature were shown and discussed. In particular, a different behavior in crack extension modes and fracture toughness of R-PUF has been experimentally characterized depending on direction of a notch, tempearture and crosshead speed in the compact tension tests. The acoustic emission analyses and the finite element simulations proposed in the previous report have been shown to be effective in comparing the fracture behavior of R-PUF with that of G-PUF in the compact tension tests as well as the case of three-point bending tests.
社団法人日本船舶海洋工学会の論文