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Varsha M.P., Mahesh, Prashant Rawat
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- Assistant Professor, Department of Mechanical Engineering, National Institute of Technology, Tiruchirappalli, Department of Aerospace Engineering, Indian Institute of Technology Madras, Chennai, Department of Aerospace Engineering, Indian Institute of Technology Madras, Chennai, Tamil Nadu, Tamil Nadu, Tamil Nadu, India, India, India
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Abstract
nThe 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.
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Keywords: Axial compression; GFRP; Hybrid crash-box; Crashworthiness; Failure Modes, DIC; Acoustic analysis; Non-contact fracture analysis
n[if 424 equals=”Regular Issue”][This article belongs to Journal of Polymer and Composites(jopc)]
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| Volume | ||
| [if 424 equals=”Regular Issue”]Issue[/if 424][if 424 equals=”Special Issue”]Special Issue[/if 424] [if 424 equals=”Conference”][/if 424] | ||
| Received | January 6, 2024 | |
| Accepted | March 23, 2024 | |
| Published | April 24, 2024 |
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