A NON-LINEAR REGRESSION MODEL OF THE DEFORMATION BEHAVIOUR OF ALUMINIUM FOAMS SUBJECTED TO QUASI-STATIC COMPRESSION

Authors

  • K. K. Alaneme Department of Metallurgical and Materials Engineering. Federal University of Technology. Akure, PMB 704. Nigeria Author
  • U. Ramamurty Department of Materials Engineering. Indian Institute of Science, Bangalore, India. Author
  • F. Garcia-Moreno Department of Materials Science. Hahn - Meitner - Institut, Berlin, Germany Author

Keywords:

Regression model, Elasto-plastic stress-strain behaviour, Aluminum foam, Impact Safety, Compression test

Abstract

A nonlinear regression model to elucidate the elasto-plastic stress-strain deformation behaviour of aluminum foams subjected to quasi-static compression is presented. Compression tests were conducted on Aluminium foams with relative densities within the range of 0.1217-0.7558, and at a strain rate of 10/s; also, the data generated was modelled using Matlab software. The model developed was found to effectively fit the experimental data and predict reliably the stress. strain response within the relative density range of 0.1 0.8. The regression model proposed was found to also capture fully the three typical deformation sequence of the stress-strain response of Aluminium foams, namely: linearity, plasticity-like stress plateau, and densification phases. The proposed model will be invaluable for prescribing Aluminium foam relative densities for specific applications where impact safety and crashworthiness are important.

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Published

2013-03-29

Issue

Vol. 47 No. 1 (2013): NSE TECHNICAL TRANSACTION JOURNAL (NSE TT-J)

Section

Articles