Liang_Revised Manuscript.pdf (1.45 MB)

Experimental and numerical study on crashworthiness of cold-formed dimpled steel columns

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journal contribution
posted on 01.04.2021, 10:29 by Ce Liang, Chang Jiang Wang, Van Bac Nguyen, Martin English, Diane Mynors
The UltraSTEEL® forming process forms plain steel sheets into dimpled steel sheets and this process increases the sheet material’s strengths by generating plastic deformation on the material during the process. This paper presented experimental testing and developed a finite element (FE) model to predict the energy absorption characteristics of dimpled thin-walled structures under axial impact loads, and compared the energy absorption efficiencies (specific energy absorption) of plain and dimpled columns. Dynamic experimental tests were conducted using the drop tower at two different impact velocities. Explicit FE analysis were then carried out to simulate the experiments. The FE method was validated by comparing the numerical and experimental failure modes, crushing force response and specific energy absorptions. The validated FE method was then applied in an optimization study on the parameter of forming depth. The effects of forming depth on both geometry and material properties have been taken into account in the optimization study. It has been found that the specific energy absorption of dimpled columns is up to 16.3% higher than the comparable plain columns.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Thin-Walled Structures

Volume

112

Pages

83 - 91

Publisher

Elsevier BV

Version

AM (Accepted Manuscript)

Rights holder

© Elsevier

Publisher statement

This paper was accepted for publication in the journal Thin-Walled Structures and the definitive published version is available at https://doi.org/10.1016/j.tws.2016.12.020

Acceptance date

21/12/2016

Publication date

2016-12-29

Copyright date

2017

ISSN

0263-8231

Language

en

Depositor

Dr Ce Liang. Deposit date: 31 March 2021

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