爆発成形に関する基礎的研究 : 第1報, 加圧機構について

概要

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It is the purpose of this study to find out the mechanism of loading subject to underwater explosive forming. The authors carried out experiments on several items, and obtained the following results. (1) The action of the shock wave lasts for about several μs. Under this loading condition, the built-in circular plate is deformed into cone shape (1st pressure). (2) Bubble pulse is more statical than shock-wise, and the pressure caused by the stream of water is almost static. Therefore, if these pressures act together, the shape of the specimen changes from cone-shape to the spherical shape (2nd and 3rd pressures). (3) When the stand-off distance is constant, and the charge depth is varied, the degree of deformation of the metal plate and the impulse of pressure vary. (4) The most suitable depth of the charge is approximately equal to the maximum radius of expanding gas. Under this depth, the ratio of the first impulse to the sum of the second and the third impulses is 1 : 2.
社団法人日本機械学会の論文
1963-12-25