Axial Compression Behavior of Aluminum (Al), Glass/Epoxy (GFRP) and Hybrid Al-GFRP Crash-box: An Experimental and Digital Image Correlation Approach

Open Access

Year : 2024 | Volume :12 | Special Issue : 01 | Page : 304-313
By

Varsha M.P.

Mahesh

Prashant Rawat

  1. Department of Mechanical Engineering, National Institute of Technology, Tiruchirappalli Tamil Nadu India
  2. Department of Aerospace Engineering, Indian Institute of Technology Madras, Chennai Tamil Nadu India
  3. Assistant Professor Department of Aerospace Engineering, Indian Institute of Technology Madras, Chennai Tamil Nadu India

Abstract

The study aims to understand the axial compression characteristics and fracture of cylindrical Aluminum (Al), Glass/epoxy (GFRP) composite and Hybrid Al-GFRP crash-boxes. The hollow Al tubes are fabricated by rolling and bonding a thin aluminum sheet followed by rivet joints. The GFRP samples are manufactured using the wet-hand layup technique followed by the vacuum bagging method. Hybrid samples are manufactured by covering GFRP tubes with aluminum sheets on the outer and inner sides bonded by commercial Araldite®. The prepared samples are axially compressed in a universal testing machine (UTM). The strain field study by the Digital Image Correlation (DIC) technique is performed to identify the possibility of fracture modes in the prepared crash boxes. The continuous damage progression is measured using acoustic sound signatures. It is observed from the experimental results that the Al-GFRP samples showed the highest load carrying capacity. The GFRP composites showed the highest specific energy absorption (SEA) and a relatively stable axial crushing phenomenon. The comparative results proved that DIC and acoustic analysis can accurately identify the fracture in hollow crash-boxes (without physical contact and causing damage in the samples) during the experiments.

Keywords: Axial compression; GFRP; Hybrid crash-box; Crashworthiness; Failure Modes, DIC; Acoustic analysis; Non-contact fracture analysis

[This article belongs to Special Issue under section in Journal of Polymer and Composites(jopc)]

How to cite this article: Varsha M.P., Mahesh, Prashant Rawat. Axial Compression Behavior of Aluminum (Al), Glass/Epoxy (GFRP) and Hybrid Al-GFRP Crash-box: An Experimental and Digital Image Correlation Approach. Journal of Polymer and Composites. 2024; 12(01):304-313.
How to cite this URL: Varsha M.P., Mahesh, Prashant Rawat. Axial Compression Behavior of Aluminum (Al), Glass/Epoxy (GFRP) and Hybrid Al-GFRP Crash-box: An Experimental and Digital Image Correlation Approach. Journal of Polymer and Composites. 2024; 12(01):304-313. Available from: https://journals.stmjournals.com/jopc/article=2024/view=144260

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Special Issue Open Access Original Research
Volume 12
Special Issue 01
Received January 6, 2024
Accepted March 23, 2024
Published April 24, 2024