Change search
ReferencesLink to record
Permanent link

Direct link
Dynamic failure of clamped circular plates subjected to an underwater shock
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Lightweight Structures.
Cambridge University Engineering Department.
Cambridge University Engineering Department.
Cambridge University Engineering Department.
2007 (English)In: Journal of Mechanics of Materials and Structures, ISSN 1559-3959, Vol. 2, no 10, 2007-2023 p.Article in journal (Refereed) Published
Abstract [en]

Clamped circular copper plates have been subjected to exponentially decaying underwater blast waves with peak pressures in the range 10MPa to 300MPa and decay constants varying between 0.05ms to 1.1 ms. The deformation and failure modes were observed by high-speed photography. For the thin plates considered in this study, the failure modes were primarily governed by the peak pressures and were reasonably independent of the blast wave decay constant. Three modes of deformation and failure were identified. At low pressures, the plates undergo bending and stretching without rupture (mode I). At intermediate pressures a range of tensile tearing modes were observed, from petalling failures to tearing at the supports with increasing blast pressures. These tearing modes are referred to as mode II failures. At the highest pressures investigated here, the plate tears at the supports in a manner that is reminiscent of a shear-off failure. This failure is labeled as mode III. Scanning electron micrographs of the failure surfaces showed that in all cases, the local failure mechanism was tensile necking. Finite element (FE) simulations employing a local shear failure criterion are used to model the rupture of the material. Appropriately calibrated FE models capture all failure modes with sufficient fidelity.

Place, publisher, year, edition, pages
2007. Vol. 2, no 10, 2007-2023 p.
Keyword [en]
dynamic fracture, petalling, underwater blast, FE simulation
National Category
Fluid Mechanics and Acoustics
URN: urn:nbn:se:kth:diva-25108ISI: 000256438600008OAI: diva2:355821
QC 20101011Available from: 2010-10-11 Created: 2010-10-08 Last updated: 2010-10-11Bibliographically approved

Open Access in DiVA

No full text

Other links

Journal of Mechanics of Materials and Structures

Search in DiVA

By author/editor
Kazemahvazi, Sohrab
By organisation
Lightweight Structures
Fluid Mechanics and Acoustics

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 52 hits
ReferencesLink to record
Permanent link

Direct link