Energy Response of Idealized Composite Sandwich Panels under Blast Loads
Publication: Journal of Engineering Mechanics
Volume 140, Issue 1
Abstract
This paper presents the development and application of a simplified analytical model to analyze the energy response of an idealized composite sandwich panel under blast loads. The model is used to gain insight into optimizing the energy absorption capabilities, and thus blast resistance, of the core of these structures. The analytical predictions calculate spatial and time variations in blast pressure as a result of charge size and location as well as the corresponding structural response based on velocity transfer among the sandwich panel components and discretization of the sandwich panel into a system of single degree of freedom mass-spring systems. The energy absorption mechanisms considered include absorbed strain energy as a result of inelastic deformation of the core and energy dissipation through progressive failure of the core, where the failure criterion is the failure strain where the composite material loses strength. The results demonstrate that energy absorption is maximized when failure of the core is prevented. The accuracy of the program as a result of the simplifying assumptions made in the derivation of the analytical approach is also reviewed.
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Acknowledgments
This work was supported by the Department of Defense through the EPSCoR program.
References
Baker, W. E. (1973). Explosions in air, University of Texas Press, Austin, TX.
Conrath, E. J., Krauthammer, T., Marchand, K. A., and Mlakar, P. F. (1999). Structural design for physical security: State of the practice, ASCE, Reston, VA.
Fleck, N. A., and Deshpande, V. S. (2004). “The resistance of clamped sandwich beams to shock loading.” J. Appl. Mech., 71(3), 386–401.
Guruprasad, S., and Mukherjee, A. (2000a). “Layered sacrificial claddings under blast loading. Part I—Analytical studies.” Int. J. Impact Eng., 24(9), 957–973.
Guruprasad, S., and Mukherjee, A. (2000b). “Layered sacrificial claddings under blast loading. Part II—Experimental studies.” Int. J. Impact Eng., 24(9), 975–984.
Hanssen, A. G., Enstock, L., and Langseth, M. (2002). “Close-range blast loading of aluminium foam panels.” Int. J. Impact Eng., 27(6), 593–618.
Headquarters, Department of the Army (HQDA). (1986). “Fundamentals of protective design for conventional weapons.” TM 5-855-1, Washington, DC.
Hyde, D. (1988). User’s guide for miscrocomputer programs CONWEP and FUNPRO. Applications of TM 5-855-1, fundamental of protective design for conventional weapons, U.S. Army Corp of Engineers, Washington, DC.
Kinney, G., and Graham, K. J. (1985). Explosive shocks in air, Springer, New York.
Livermore Software Technology Corporation (LSTC). (2007). LS-DYNA theory manual, Livermore, CA.
MATLAB 7.5.0.342 [Computer software]. Natick, MA, MathWorks.
Randers-Pehrson, G., and Bannister, K. A. (1997). “Airblast loading model for DYNA2D and DYNA3D.” Technical Rep. ARL-TR-1310, U.S. Army Research Laboratory, Adelphi, MD.
Su, H. (2011). “Energy absorption capabilities of composite sandwich panels under blast loads.” Ph.D. dissertation, Univ. of Delaware, Newark, DE.
Su, H., and McConnell, J. (2012). “Optimum material properties for energy absorption of composite sandwich panels under blast loads.” J. Compos. Constr., 16(4), 464–476.
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Information
Published In
Journal of Engineering Mechanics
Volume 140 • Issue 1 • January 2014
Pages: 20 - 30
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Jan 13, 2012
Accepted: Mar 17, 2013
Published online: Mar 19, 2013
Published in print: Jan 1, 2014
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