Numerical Simulation of Damage and Energy Absorption Characteristics for Honeycomb Aluminum with Single Cover Plate during Hypervelocity Impact
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摘要:为了研究蜂窝铝单层盖板结构遭遇超高速碰撞后的破坏和吸能特性，采用光滑粒子流体动力学（SPH）法，应用Johnson-Cook本构模型、Tillotson状态方程，利用UIDL语言将APDL程序嵌入到ANSYS软件中进行结构的三维建模；开展了铝弹丸超高速碰撞相同盖板厚度的蜂窝铝单层盖板结构的数值模拟，研究不同碰撞速度、不同弹丸入射角度及蜂窝铝厚度下蜂窝铝的破坏和吸能特性。结果表明，蜂窝铝芯层越厚吸能效果愈好，碰撞角度对蜂窝铝吸能效果影响不大，破坏模式与吸能特性关系密切。
Abstract:In order to investigate characteristics of damage and absorption energy for honeycomb aluminum with single cover plate structure during hypervelocity impact, the smooth particle hydrodynamic（SPH）method, Johnson-Cook constitutive model and Tillotson state equation were adopted, and three-dimension model was established by APDL procedure implanted ANSYS software using UIDL computer language. Simulations of aluminum projectile impacting honeycomb aluminum with single cover plate were performed at the same cover plate thickness, the characteristics of damage and energy absorption under different impact velocity, different incidence angles of projectile and honeycomb aluminum thicknesses were studied. Simulation results show that energy absorption effect is better with honeycomb core thickness increasing. However, impact angle has little influence on energy absorption effect of honeycomb, failure mode has some influence on energy absorption characteristics.
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