DYMAT 2009 (2009) 319-324
DOI: 10.1051/dymat/2009044

On the perforation process of 2024-T3 aluminium sheets subjected to low impact velocity: Effects of friction condition and initial temperature

J.A. Rodriguez-Martinez¹, A. Rusinek², A. Arias¹ and E. Dossou<sup>3

1</sup>  Department of Continuum Mechanics and Structural Analysis, University Carlos III of Madrid, Avda. de la Universidad 30, 28911 Leganés, Madrid, Spain
²  Engineering School of Metz (ENIM), Laboratory of Mechanic, Biomechanic, Polymer and Structures (LABPS), Ile du Saulcy, 57000 Metz, France
³  Laboratory of Physics and Mechanics of Materials (LPMM) University Paul Verlaine of Metz, Ile du Saulcy, 57045 Metz, France

Published online: 15 September 2009

Abstract
An experimental analysis on the impact behaviour of 2024-T3 aluminium sheets is performed for initial temperatures varying from 213 K to 373 K and for impact velocities from the ballistic limit up to 4.5 m/s. The aluminium sheets are subjected to perforation by an hemispherical striker using a drop weight tower. Dry and lubricated conditions are applied to the contact striker/plate. Different failure modes depending on the friction condition used have been observed. Moreover, it was noticed that initial temperature plays a relevant role in the absorption of energy by the aluminium sheets. The increase of the material flow stress as the initial temperature decreases leads to larger amount of energy absorbed by the target. Such behaviour is relevant for aeronautical applications.

© EDP Sciences 2009