Energy Absorption Capacity of Prismatic Cellular Metals

M. Kaaz*, Prof. F. Richard Hall+, J. Spence+, Prof. H. Bauer*
+Midlands Simulation Group, University of Wolverhampton, MA115(SEBE),
Wulfruna Street, Wolverhampton,WV1 1SB. Email:
*University of Aalen, Beethovenstrassel, 73430, Aalen, Germany.

In this study the energy absorption capacity of prismatic cellular materials were examined using 2D Finite-Element (FE) simulations. The energy absorption capacity of many core topologies has been predicted under quasi-static compression. Subsequently, the dynamic impact behaviour of one of these structures, with good energy absorption characteristics, has been assessed for a range of impact velocities from 10 to 1000 m/s. As the impact speed increases, different deformation modes are noticed and the effects of stress wave propagation become more important. The importance of these studies is identified for the future development of lightweight, and impact-resistant, structured materials.

KEYWORDS: cellular metals, energy absorption, impact, stress wave propagation.

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