McDonald, B., Bornstein, H., Langdon, G. orcid.org/0000-0002-0396-9787 et al. (2 more authors) (2017) Deformation and rupture of armour grade steel under localised blast loading. In: Børvik, T., Clausen, A.H., Hopperstad, O.S., Langseth, M. and Reyes, A.G., (eds.) Procedia Engineering. DYMAT 23rd Technical Meeting - International Conference on Dynamic Fracture of Ductile Materials, 12-14 Sep 2017, Trondheim, Norway. Elsevier BV , pp. 13-22.
Abstract
A series of 30 blast experiments were conducted on monolithic steel panels of two armour grade steels. The two steels evaluated were a high hardness armour (HHA) and a rolled homogenous armour (RHA). Tests were conducted at two standoff distances using a fixed charge diameter. The charge weight was varied to produce specific magnitudes of blast loading and to isolate the rupture threshold of each material. The results indicated that the HHA steel, generally reserved for ballistic protection, outperformed a more ductile RHA steel in terms of both its deformation resistance and rupture threshold. Optical and scanning electron microscopy was utilised for fractographic analysis of the ruptured plates. The failure of the steels in this investigation was found to be initiated by slant shear fracture with little to no localised thinning. This is in contrast to the tensile instability and ductile tearing predicted by established theories of plate rupture for mild steels under blast loading. The deformation and rupture of the candidate steels was analysed for all experimental conditions and compared to current empirical models based on a non-dimensional impulse parameter. While deformation behaviour is well predicted, the blast rupture threshold of the armour grade steels is poorly captured by current empirical modelling approaches. The identified shear fracture mode leads to lower energy absorption capabilities of the material compared to more ductile tensile failure.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Editors: |
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Copyright, Publisher and Additional Information: | © 2017 Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
Keywords: | Armour Steel; Blast Loading; Shear Fracture |
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: | 07 Apr 2020 11:00 |
Last Modified: | 07 Apr 2020 11:01 |
Status: | Published |
Publisher: | Elsevier BV |
Refereed: | Yes |
Identification Number: | 10.1016/j.proeng.2017.08.077 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:159059 |