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Experimental and numerical study on crashworthiness of cold-formed dimpled steel columns
journal contribution
posted on 2023-06-09, 04:31 authored by Ce Liang, Chang WangChang Wang, Van Bac Nguyen, Martin English, Diane MynorsThe 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
Publication status
- Published
File Version
- Accepted version
Journal
Thin-Walled StructuresISSN
0263-8231Publisher
ElsevierExternal DOI
Volume
112Page range
83-91Department affiliated with
- Engineering and Design Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2017-01-03First Open Access (FOA) Date
2017-01-03First Compliant Deposit (FCD) Date
2017-01-03Usage metrics
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