204 発泡ウレタン材の三次元圧縮挙動に関する実験的検討

概要

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The weight reduction in vehicles without decreasing their safety is an important subject in manufacturing automobiles to improve the fuel efficiency and eventually to reduce the environmental pollution. To use high-stiffness urethane foam is one of the possible solutions to improve the body stiffness and the energy absorption of the vehicle. Therefore it is important to clarify the consolidation condition of the urethane foam under multi-axial loading conditions. Compaction properties of the uretahne foams were examined through both uniaxial compression and three-dimentional compression tests. Experimentally obtained true stresses at several compaction densities are shown on the Rendulic plane where principal stresses σ_2 and σ_2 take the same value. From the results compaction behavior of urethane foam is found to be successfully described by the constitutive equation proposed by Oyane & Shima (1976) for porous materials.
一般社団法人日本機械学会の論文
2003-00-00