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Published on: January 6, 2023
Finite Element Analysis of Aluminum Honeycombs Subjected to Dynamic Indentation and Compression Loads
A S M Ayman Ashab1, Dong Ruan2, Guoxing Lu3
1Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, VIC 3122, Australia. aashab@swin.edu.au.
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, σ, and dissipated energy (E for indentation and E 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.
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