Rigby, S.E., Tyas, A., Bennett, T. et al. (3 more authors) (2014) A Numerical Investigation of Blast Loading and Clearing on Small Targets. International Journal of Protective Structures, 5 (3). 253 - 274. ISSN 2041-4196
Abstract
When a blast wave strikes a finite target, diffraction of the blast wave around the free edge causes a rarefaction clearing wave to propagate along the loaded face and relieve the pressure acting at any point it passes over. For small targets, the time taken for this clearing wave to traverse the loaded face will be small in relation to the duration of loading. Previous studies have not shown what happens in the late-time stages of clearing relief, nor the mechanism by which the cleared reflected pressure decays to approach the incident pressure. Current design guidance assumes a series of interacting clearing waves propagate over the target face - this assumption is tested in this article by using numerical analysis to evaluate the blast pressure acting on small targets subjected to blast loads. It is shown that repeat propagations of the rarefaction waves do not occur and new model is proposed, based on an over-expanded region of air in front of the loaded face of the target.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2014 Multi-Science Publishing. Reproduced in accordance with the publisher's self-archiving policy. |
Keywords: | Blast; Clearing; Diffraction; Experimental Validation; Hudson; LS-DYNA; UFC-3-340-02 |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Civil and Structural Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 25 Nov 2014 09:50 |
Last Modified: | 23 Mar 2015 01:38 |
Published Version: | http://dx.doi.org/10.1260/2041-4196.5.3.253 |
Status: | Published |
Publisher: | Multi-Science Publishing |
Refereed: | Yes |
Identification Number: | 10.1260/2041-4196.5.3.253 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:81823 |