Blast loading: effect of steel plate curvature using FEA

Stevens, Guy (2016) Blast loading: effect of steel plate curvature using FEA. MEng dissertation, University of Portsmouth.

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    Abstract

    Steel plating is commonly used in the defence industry for impact and blast resistance due to its high strength and ductility. Because of these extreme loading conditions and the devastation that can be caused by them it is critically important to understand the performance of different types and shapes of steel. Much research has been done on the behaviour of fully clamped circular and square steel plates but little has been done on plating with mixed boundary conditions. This thesis will explore the reactions of square steel plates with different curvatures which have been simply supported along two opposite edges with the other two free.
    The CFD program Autodyn has been used to model a 2.3kg TNT explosion as well as the structural reaction of the plates. A mesh refinement study was undertaken to assess the alternative ‘re-mapping’ method used. The alternative method gave accurate predictions of overpressure but overestimated the impulse.
    In regards to the response of the plates it was found that an increase in curvature has little effect on the response type but causes it to be less pronounced. The 30° plate experienced a larger range of motion and smaller stress along the supports suggesting it is more tolerant to blasts. A ‘flapping’ behaviour was also identified which decreases with curvature.

    Item Type: Dissertation
    Departments/Research Groups: Faculty of Technology > School of Civil Engineering and Surveying
    Depositing User: Beth Atkins
    Date Deposited: 01 Sep 2016 09:17
    Last Modified: 01 Sep 2016 09:17
    URI: http://eprints.port.ac.uk/id/eprint/21650

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