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Finite Element Modeling of Multilayer Orthogonal Auxetic Composites under Low-Velocity Impact

by Lili Jiang and Hong Hu *
Institute of Textile and Clothing, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
*
Author to whom correspondence should be addressed.
Materials 2017, 10(8), 908; https://doi.org/10.3390/ma10080908
Received: 27 June 2017 / Revised: 14 July 2017 / Accepted: 2 August 2017 / Published: 5 August 2017
(This article belongs to the Special Issue Auxetic Materials 2017-2018)
The multilayer orthogonal auxetic composites have been previously developed and tested to prove that they own excellent energy absorption and impact protection characteristics in a specific strain range under low-velocity impact. In this study, a three dimensional finite element (FE) model in ANSYS LS-DYNA was established to simulate the mechanical behavior of auxetic composites under low-velocity drop-weight impact. The simulation results including the Poisson’s ratio versus compressive strain curves and the contact stress versus compressive strain curves were compared with those in the experiments. The clear deformation pictures of the FE models have provided a simple and effective way for investigating the damage mechanism and optimizing the material, as well as structure design. View Full-Text
Keywords: finite element modeling; multilayer orthogonal auxetic composites; low-velocity impact; negative Poisson’s ratio finite element modeling; multilayer orthogonal auxetic composites; low-velocity impact; negative Poisson’s ratio
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Jiang, L.; Hu, H. Finite Element Modeling of Multilayer Orthogonal Auxetic Composites under Low-Velocity Impact. Materials 2017, 10, 908.

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