Parametric study and optimization of the protect system containing a re-entrant hexagon cored sandwich panel under blast impact. (15th November 2020)

• Record Type: Journal Article
• Authors: Qi, Chang; Pei, Lian-Zheng; Remennikov, Alex; Yang, Shu; Liu, Jun; Wang, Jun-Shan; Liao, Xiang-Wei
• Is Part Of: Composite structures. Volume 252(2020)
• Publication Date: 2020-11-15
• Subjects: Re-entrant hexagon -- Blast loading -- Multi-scale optimization -- Multi-objective optimization -- Sandwich panel; Composite construction -- Periodicals; Composites -- Périodiques; 624.18
• DOI: 10.1016/j.compstruct.2020.112711
• Languages: English
• ISSNs: 0263-8223

Abstract

Highlights: A protect system containing auxetic sandwich panel and covering plate was proposed. Parametric study was conducted concerning the geometric and thickness parameters. A multi-scale optimization was performed to improve the anti-blast performances. The multi-scale optimization yielded better compromised design and cost less effort. Abstract: In this paper, a protect system consists of a re-entrant hexagon honeycomb cored sandwich panel and a homogenous steel plate was firstly proposed. The parametric study including boundary conditions, geometric and thickness parameters of the protect system was conducted. It was found that, under the presented set-up, the boundary conditions did not affect the energy absorption of the protect system, they only altered the internal energy distribution among the protect system. Finally, a novel multi-scale optimization was conducted to further improve the performance of the protect system. Another conventional multi-objective optimization was also conducted for comparison. The results showed that, by affording less computational effort, the multi-scale optimization improved the ASEA (areal specific energy absorption) by 4.9% and reduced MaxD (maximum displacement) by 1.8%, comparing to the conventional multi-objective optimization.