2815 爆発成形中の金属板の挙動に関する数値シミュレーション(S36-1 高エネルギー加工(1),S36 高エネルギー加工)

抄録

It has been difficult to effectively and accurately form materials, such as aluminium based alloys, using conventional methods. Recently, explosive forming with a capability of producing larger deformations than is possible with normal static press forming has become an interesting research topic and is seen as an alternative to traditional methods. However, when the affecting pressure wave is too large, the metal sheet may be destroyed. Explosive forming using underwater shockwaves is examined in this research paper through both experiment and numerical simulation. The explosive forming was performed using the free stretch forming method, allowing a better understanding of the basic mechanisms and characteristics. Numerical simulations are performed in three dimensions using the LS-DYNA code. Experimental and numerical results are seen to correspond to a high degree.