Blast resistance of sandwich structures with auxetic double arrowhead cores

Babu, Geethu R. and Nair, Rajesh P. (2025) Blast resistance of sandwich structures with auxetic double arrowhead cores. POLLACK PERIODICA: AN INTERNATIONAL JOURNAL FOR ENGINEERING AND INFORMATION SCIENCES, 21 (1). pp. 30-38. ISSN 1788-1994

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Abstract

Sandwich structures, with thin, stiff face sheets bonded to lightweight cores, are ideal for applications requiring high strength-to-weight ratios and energy absorption, like those exposed to explosions. This study examines the dynamic behavior of sandwich panels with auxetic double arrowhead-shaped cores under explosive loading using ABAQUS Explicit Dynamics code. Modified core designs (single-, double-, and triple-layer triangular shapes) are compared to the conventional design. Results show the double-layer triangular core excels in blast resistance, reducing deformation and stress while enhancing energy absorption. These findings highlight its potential for blast-resistant applications.

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