@article{oai:jaxa.repo.nii.ac.jp:00035223,
 author = {福井, 伸二 and 河田, 幸三 and 清野, 次郎 and FUKUI, Shinji and KAWATA, Kozo and SEINO, Jiro},
 issue = {1},
 journal = {東京大学航空研究所集報},
 month = {Mar},
 note = {半球形,円筒形ダイスを使用し,各種薄板金属の水中における爆発成形にかんする基礎研究を行なった.成形品の加工硬化は爆発成形においても静的加工と同様にみいだされ,成形品のひずみ分布は,素板直径,工具形状,しわ押え方法,爆発圧力等により変化する.ステンレス鋼と黄銅素板は,爆発成形においてもまた大きく変形が可能であるが,チタニウム合金素板は比較的その傾向が小さいようである.これらの実験結果から,有効な薄板の成形を行なうにはあらゆる場合において成形条件をできるだけ深絞りになるよう調整する必要のあることが知られる.爆発最高圧力を表わすKirkwoodおよびBetheの理論は大形水槽中には有効に適用できるが,小形水槽の中では適用できない.成形用型材は,アルミニウム素板に対してはカークサイトで十分であるが,ステンレス鋼素板に対しては軟鋼より強さの大きい材料を用いるべきである.爆発成形での素板変形速度は爆発圧力によりかなり影響されるが,この実験では最高200～300m/sccになる.ひずみ速度はこの変形速度から計算され約10^2～10^3/secに達する.しかしもちろん加工度の小さい場合は,上述のひずみ速度以下で成形が完了する., Underwater explosive forming of various sheet metals is studied with hemispherical, cylindrical dies etc. Work hardening of formed blanks is found in explosive forming as well as in statical forming. The strain distribution of formed blanks varies with the diameter of blank, shape of tool, blank holding method and explosion pressure. 18-8 stainless steel and 65/35 brass blanks are largely deformed in explosive forming also, but Ti alloy blank is not necessarily so, probably because the elongation of Ti alloy is rather small. In conclution, the forming conditions should in all cases be so arranged as to enable deep-drawing to be made as much as posible for effective use of the blank. Kirkwood & Bethe theory to explain the maximum explosion pressure can not be applied in small water tanks. As the material of dies for explosive forming, Kirksite is satisfactory for blanks of aluminium but materials with higher strength than that of mild steel should be used for stainless steel blanks. Deformation speed of blanks in explosive forming is considerably affected by explosion pressure and is found to come up to the extent of 200～300m/sec in some cases. The strain velocity is calculated from the forming velocity and comes up to the order of 10^2～10^3/sec. But forming will be completed at the strain velocity lower than the above-mentioned value when the degree of working is small., 資料番号: SA4137119000},
 pages = {22--36},
 title = {高エネルギ速度加工の基礎的研究 第1報 : 薄板金属の爆発成形について},
 volume = {3},
 year = {1962}
}