硬質ポリウレタン発泡体の圧縮変形におけるエネルギー吸収特性

概要

論文の詳細を見る
Energy absorbability of foamed rigid polyurethane was studied by static compression and impact tests on knee and head models with the shapes prescribed in MVSS (Motor Vehicle Safety Standard in U. S. A.). The following results were obtained. (1) Foamed rigid polyurethane absorbs much energy in a manner similar to ductile materials, (2) The MVSS for the knee model is satisfied by a foamed rigid polyurethane with the density of 0.075 g/cm^3 and the thickness of 120 mm, and the MVSS for the head model is satisfied by the one with 0.04 g/cm^3 density and 80 mm thickness. (3) No dependence of deformation behavior and energy absorbability of foamed rigid polyurethane on the deformation rate was observed. (4) The compressive load F and absorbing-energy E in knee model or head model tests can be described simply as follows; F=σ_pS, E=σ_p∫Sdl where σ_p is tile plateau stress obtained by the flat indenter test, l is an indentation depth of the knee model or the head one, and S is the cross section of the indenter perpendicular to the direction of a compressive load.
社団法人日本材料学会の論文
1984-08-15