Effect of honeycomb core cell geometry on the sandwich tube for internal blast loading
Vuong Nguyen‐Van, Ngoc San Ha, H. Nguyen‐Xuan, Xiaoshan Lin, Yi Min Xie, Guoxing Lu
Abstract
This study focuses on dynamic behaviours of short sandwich tubes with honeycomb cores under internal explosive loading. Six types of honeycomb geometries, i.e., Triangle, Square, Diamond, Hexagon, Kagome, and Octagon, are designed as the cores of the sandwich structures. The influence of honeycomb core geometry, wall thickness, and arrangement on the internal blast-resistant performance of sandwich tubes is identified and explored. Experimental data of the authors’ previous work is served as a basis for validation of the finite element (FE) analysis of the sandwich tubes. A comprehensive understanding of deformation modes , damage energy dissipation , and radial velocities are afforded through numerical investigation. The obtained results indicate that geometric designs and axial arrangement of the honeycomb core sandwich tube have significant influence on the deformation mechanism and explosive resistance of sandwich structures. Generally, octagonal and square honeycomb core designs proves to be more efficient in mitigating the damage of the outer shell under explosion than other core geometries. Furthermore, the findings from this research offer valuable benchmark data for the short sandwich tube to enhance the internal blast resistance .