Numerical Analysis of Hypervelocity Impacts of a Projectile on Laminated Metallic Plates by Means of Improved SPH Method.

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  • 飛行体の金属積層板に対する超高速衝突破壊現象の改良ＳＰＨ法による数値解析
  • ヒコウタイ ノ キンゾク セキソウバン ニ タイスル チョウコウソクショウトツハカイ ゲンショウ ノ カイリョウ SPHホウ ニ ヨル スウチ カイセキ

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Abstract

This paper is concerned with the numerical analysis of the hypervelocity impacts (HVIs) of a projectile on laminated metallic plate targets. Laminated metallic plates have some potential advantages to increase ballistic resistance if the plates are optimally laid up. To analyze the HVI phenomena, a Smoothed Particle Hydrodynamics (SPH) method improved by using new particle generation and particle reducing techniques is applied, and a numerical lamination model for the SPH method is presented to introduce the discontinuity of stresses between the each layer of the laminated metallic plates. As examples, the numerical simulations are carried out for a steel or aluminum projectile striking to laminated aluminum plate targets with several different layup configurations. Through the numerical simulations, it is seen that the present method can describe the characteristics of the HVI phenomena of the projectile on the laminated metallic plate targets.

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