多孔性高分子材料の弾塑性破壊じん性に及ぼす温度と空孔の影響

概要

論文の詳細を見る
The J-integral resistance curve method is applied to RIM-polyurethan from which the skin layer is removed, as a porous and polymeric material. We have studied how the fracture toughness J_<in> and J_c values are affected by temperature and void. It is found that the stable fracture appears in the temperature range from -40 to 20℃ and that the unstable fracture appears in the temperature range from -120 to -60℃. The J_<in> values are almost constant in the temperature range from -40 to 20℃ and the J_c value have a maximum value at the temperature of about -60℃. It is considered that the ductile-brittle transition point exists at a temperature between -60 and -40℃. The J_<in> values increase with an increase of void content from 5 to 17% and decrease with an increase of void diameter on a constant void content at a temperature of 20℃. The J_c values decrease with an increase of void content from 5 to 17% and are not affected by the void diameter on a constant void content at the temperature of -80℃.
一般社団法人日本機械学会の論文
1986-09-25