Metallic Closed-Cell Foam Filled Tube Uniaxial Crushing Behavior Analysis Using Voronoi Approach

Document Type : Research Article

Authors

1 Mechanical Engineering Department, SRTTU, Tehran, Iran

2 Mechanical Engineering Department, Shahid Rajaee University, Tehran, Iran

3 Mechanical Engineering Department, Amirkabir University of Technology, Tehran, Iran

4 Department of Mining & Metallurgical Engineering, Amirkabir University of Technology, Tehran, Iran

5 Industrial Engineering Department, Tehran North Branch, Islamic Azad Universitty, Tehran, Iran

Abstract

Porous materials especially metallic foams are novel materials with high energy absorption and strength to weight ratio capability. In the present paper, we investigate quasi-static uniaxial compression and crushing behavior of closed-cell graded aluminum foams and foam-filled tubes, both numerically and experimentally. To model the mentioned specimens, we place cubes with several densities and strengths to generate functionally graded specimens. Specimens are considered to be graded with two and three layers and non-graded single layer, with and without tubes. Various standard uniaxial compression experiences are conducted for numerical model calibration and validation and also for non-linear mechanical properties and hardening characterization. To enhance strength and energy absorption capability and also tailoring purpose, we layout the cubic foams in tubes with square profile. The 3D Voronoi diagrams approach is manipulated to model stochastic foam microstructure. Also Novel unit cell is proposed based upon Kelvin cell. We implement the hybrid finite element analysis and Voronoi diagram using Python script and Abaqus 2017 commercial finite element method based code for more convenient modeling and efficient analysis. Finally, and after numerical model calibrations, numerical and experimental results showed good agreement.

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References

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Amirkabir Journal of Mechanical Engineering
Volume 52, Issue 8
November 2020
Pages 2135-2148

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