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Materials 2016, 9(3), 162; doi:10.3390/ma9030162

Finite Element Analysis of Aluminum Honeycombs Subjected to Dynamic Indentation and Compression Loads

Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
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Author to whom correspondence should be addressed.
Academic Editor: Xiaodong Huang
Received: 27 January 2016 / Revised: 24 February 2016 / Accepted: 29 February 2016 / Published: 4 March 2016
(This article belongs to the Special Issue Cellular Materials: Design and Optimisation)
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Abstract

The mechanical behavior of aluminum hexagonal honeycombs subjected to out-of-plane dynamic indentation and compression loads has been investigated numerically using ANSYS/LS-DYNA in this paper. The finite element (FE) models have been verified by previous experimental results in terms of deformation pattern, stress-strain curve, and energy dissipation. The verified FE models have then been used in comprehensive numerical analysis of different aluminum honeycombs. Plateau stress, σpl, and dissipated energy (EI for indentation and EC for compression) have been calculated at different strain rates ranging from 102 to 104 s−1. The effects of strain rate and t/l ratio on the plateau stress, dissipated energy, and tearing energy have been discussed. An empirical formula is proposed to describe the relationship between the tearing energy per unit fracture area, relative density, and strain rate for honeycombs. Moreover, it has been found that a generic formula can be used to describe the relationship between tearing energy per unit fracture area and relative density for both aluminum honeycombs and foams. View Full-Text
Keywords: finite element analysis; indentation; relative density; tearing energy; strain rate finite element analysis; indentation; relative density; tearing energy; strain rate
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Ashab, A.A.; Ruan, D.; Lu, G.; Bhuiyan, A.A. Finite Element Analysis of Aluminum Honeycombs Subjected to Dynamic Indentation and Compression Loads. Materials 2016, 9, 162.

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