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The resistance of metallic plates to localized impulse |
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| Authors: | Z Wei VS Deshpande KP Dharmasena HNG Wadley RK Elzey Y Chen K Kiddy |
| Institution: | a Materials Department, University of California, Santa Barbara, CA 93106, USA b Mechanical Engineering Department, University of California, Santa Barbara, CA 93106, USA c Department of Materials Science, University of Virginia, Charlottesville, VA 22904, USA d Cellular Materials International, Inc., Charlottesville, VA 22903, USA e Naval Surface Warfare Center, Carderock, MD 20817, USA f Naval Surface Warfare Center, Indian Head, MD 20640, USA |
| Abstract: | 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. |
| Keywords: | Metallic sandwich panels Triangular honeycomb core Doubly-corrugated core DYSMAS-ABAQUS simulation Fluid/structure interaction |
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