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

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    Authors
    Liang, Ce
    Wang, Chang
    Nguyen, Van Bac cc
    English, Martin
    Mynors, Diane
    Affiliation
    University of Sussex
    University of Derby
    Hadley Industries plc
    Issue Date
    2016-12-29
    
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    Abstract
    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.
    Citation
    Liang, C. et al. (2017) 'Experimental and numerical study on crashworthiness of cold-formed dimpled steel columns', Thin-Walled Structures, Vol 112, pp. 83–91
    Publisher
    Elsevier
    Journal
    Thin-Walled Structures
    URI
    http://hdl.handle.net/10545/621442
    DOI
    10.1016/j.tws.2016.12.020
    Additional Links
    http://www.sciencedirect.com/science/article/pii/S0263823116305195
    Type
    Article
    Language
    en
    ISSN
    02638231
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.tws.2016.12.020
    Scopus Count
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    Department of Mechanical Engineering & the Built Environment

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