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Plastic deformation due to reflected detonation

Karnesky, James and Damazo, Jason and Chow-Yee, Kliulai and Rusinek, Alexis and Shepherd, Joseph E. (2013) Plastic deformation due to reflected detonation. International Journal of Solids and Structures, 50 (1). pp. 97-110. ISSN 0020-7683. http://resolver.caltech.edu/CaltechAUTHORS:20130104-095942229

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Abstract

We report the experimental conditions and results for a series of experiments involving detonation loading of steel tubes alongside computational comparisons performed using an analytic one-dimensional model and a finite element simulation. To achieve plastic deformation, thin-walled steel tubes were filled with a stoichiometric ethylene–oxygen mixture and detonated. The range of initial pressures covered the span from entirely elastic to fully plastic deformation modes. A unique mode of periodic radial deformation was discovered. A model for the pressure load on the tube wall was developed and tested against experimental measurements. Building on the experimental results, we discuss theoretical and computational models describing these experiments. The simplest model considers the oscillation of a single degree of freedom of the tube’s cross section. Using this simple model, we explain that the periodic deformation observed in the experiment is the result of interference between the reflected shock wave and the elastic oscillations set in motion by the incident detonation. To capture the effects of boundary conditions and wave propagation, we performed computations using a two-dimensional axisymmetric model of the tube wall. For the mild steel tubes this required material testing, and the resulting constitutive relation proved to be limited. As a result, fidelity with experiments was much greater in the case of the stainless steel tubes.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/j.ijsolstr.2012.09.003DOIArticle
http://www.sciencedirect.com/science/article/pii/S0020768312003848PublisherArticle
ORCID:
AuthorORCID
Damazo, Jason0000-0002-4155-7177
Shepherd, Joseph E.0000-0003-3181-9310
Additional Information:© 2012 Elsevier Ltd. Received 16 May 2012. Received in revised form 29 August 2012. Available online 13 September 2012. This research is sponsored by the Department of Homeland Security through the University of Rhode Island, Center of Excellence for Explosives Detection. J. Damazo was supported by an NDSEG Fellowship.
Group:GALCIT
Funders:
Funding AgencyGrant Number
Department of Homeland SecurityUNSPECIFIED
National Defense Science and Engineering Graduate (NDSEG) FellowshipUNSPECIFIED
Subject Keywords:Gaseous detonation; Constitutive laws; Explosions; Finite element; Plasticity; Strain-rate
Record Number:CaltechAUTHORS:20130104-095942229
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20130104-095942229
Official Citation:James Karnesky, Jason Damazo, Kliulai Chow-Yee, Alexis Rusinek, Joseph E. Shepherd, Plastic deformation due to reflected detonation, International Journal of Solids and Structures, Volume 50, Issue 1, 1 January 2013, Pages 97-110, ISSN 0020-7683, 10.1016/j.ijsolstr.2012.09.003. (http://www.sciencedirect.com/science/article/pii/S0020768312003848)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:36164
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:04 Jan 2013 18:21
Last Modified:14 Sep 2017 17:23

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