The resistance of metallic plates to localized impulse

• Published in: Journal of the mechanics and physics of solids 2008-05, Vol.56 (5), p.2074-2091
• Main Authors: Wei, Z., Deshpande, V.S., Evans, A.G., Dharmasena, K.P., Queheillalt, D.T., Wadley, H.N.G., Murty, Y.V., Elzey, R.K., Dudt, P., Chen, Y., Knight, D., Kiddy, K.
• Format: Article
• Language: English
• Subjects: Doubly-corrugated core; DYSMAS–ABAQUS simulation; Fluid/structure interaction; Metallic sandwich panels; Triangular honeycomb core
• ISSN: 0022-5096
• DOI: 10.1016/j.jmps.2007.10.010

The responses of metallic plates and sandwich panels to localized impulse are examined by using a dynamic plate test protocol supported by simulations. The fidelity of the simulation approach is assessed by comparing predictions of the deformations of a strong-honeycomb-core panel with measurements. The response is interpreted by comparing and contrasting the deformations with those experienced by the same sandwich panel (and an equivalent solid plate) subjected to a planar impulse. Comparisons based on the center point displacement reveal the following paradox. The honeycomb panel is superior to a solid plate when subjected to a planar impulse, but inferior when localized. The insights gained from an interpretation of these results are used to demonstrate that a new design with a doubly-corrugated soft core outperforms solid plates both for planar and localized impulses.