On the response of re-entrant auxetic structure under dynamic crushing

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On the response of re-entrant auxetic structure under dynamic crushing

Authors
  • Petit, Adeline
  • Beaujouan, David
  • Delille, Rémi
  • Chaari, Fahmi
  • Langlet, André
Type
Published Article
Journal
Mechanics & Industry
Publisher
EDP Sciences
Publication Date
Dec 18, 2023
Volume
24
Identifiers
DOI: 10.1051/meca/2023040
Source
EDP Sciences
Keywords
Disciplines
  • Research Article
License
Green
External links

Abstract

The present work focuses on the dynamic crushing response of 2D re-entrant auxetic honeycomb. The aim of this work is to propose analytic formulations to predict the crushing strength of the considered structure by including design parameters (specific geometrical ratios and/or material properties). The model for dynamic impact is based on shock waves propagation analogy in a rigid, perfectly plastic, locking (R-P-P-L) material model. The formulations depend on the geometric and the material characteristics of the auxetic but also on the impact velocity. Finite Element simulations of the impact of a plate on an auxetic structure were carried out using the RADIOSS® explicit solver. The impact velocities varies from 35 m/s to 200 m/s. The numerical simulations presented in this study show good accordance between analytical and Finite Element results.

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