縦衝撃を受けたアルミニウム円管の変形挙動と円管の衝撃圧接の試み

概要

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The longitudinal impact tests of an aluminum circular tube were carried out using a gas gun. In the gas-gun apparatus, the tube which was accelerated using nitrogen gas at constant pressure, collided with a hardened load cell. The inner and outer diameters, and thickness of a tube were measured after impact and the deformation modes of the impact end were evaluated. Additionally, impact-welding of an aluminum tube to a steel target was attempted using the gas-gun having a vacuum chamber. The following results were obtained. The increase of a wall thickness caused a deformation mode to transit from a dynamic bulging to a progressive one. The stagnation area of the metal flow at the impact face of a tube was observed and the flow was not dependent on the thickness. Additionally, it was confirmed in a tentative experiment that a circular tube is impact-welded to a steel target in the stagnation area.
一般社団法人日本機械学会の論文
1998-05-25