640 5083 アルミニウム合金板におけるパンチ肩部破断応力とその解析

概要

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Stretch-bending experiments were performed for a type 5083 aluminum-magnesium sheet at various stretching speeds (0.2-200mm・(min)^<-1>) at elevated temperatures (100-200℃) on several different radii of die-corner. On the basis of the experimental results, the effects of stretching speed and temperature on the fracture strength in warm stretch bending were investigated. The stretch-bending strength decreased with decreasing stretching speed at high temperatures of 150 and 200℃, while at 100℃ it was not so sensitive to stretching speed. Furthermore, the stretch-bending strength for various conditions of temperature and stretching speed were analytically predicted using the Backofen-type constitutive equation (σ^^-=Cε^^-^nε^^<-・>^m). The predicted stretch-bending strength agrees fairly well with the corresponding experimental result.
社団法人日本機械学会の論文
2002-10-10