軸方向に圧縮された積層円管の塑性座屈挙動(機械要素,潤滑,工作,生産管理など)

概要

論文の詳細を見る
Fabricating a part from sheet material not bulk is a good method from view point of energy consumption for processing and lightening the weight. Usually, deformed part from sheet material has almost constant thickness and sometimes needs to strengthen locally. One method for strengthening is to increase the thickness. First in this study, thin aluminum pipe was compressed longitudinally for thickening in a die. The pipe with large length buckled like bellows. The limit length without buckling was small and only from 3.5 to 4 times compared with the thickness. Then, clad pipe with two materials of aluminum and stainless steel was worked in the die with mandrel. The buckling behavior varied surprisingly according to the position of the two materials. In clad pipe of outer stainless steel and inner aluminum, the buckling behavior was almost the same as aluminum single pipe. However in clad pipe of outer aluminum and inner stainless steel, the outer aluminum deformed without space between the die and the workpiece, but the inner stainless steel buckled and deformed like bellows. By this new processing, we could get smooth outer surface with no defect and a structure of large elastic rigidness simultaneously.
一般社団法人日本機械学会の論文
2002-05-25