Tortoise-back-reinforced elliptical-embedded honeycomb composite structure: experimental and numerical analysis of responses under blast loading

IF 7.1 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures Pub Date : 2025-09-15 DOI:10.1016/j.compstruct.2025.119656

Hao Chen , Ke Yan , Xingyu Shen , Jiaqi Bai , Shijun Luo , Mengqi Yuan , Shaobo Qi , Chongchi Hou

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引用次数: 0

Abstract

Honeycomb composite structures have attracted extensive attention in protective engineering due to high specific energy absorption and strength-to-weight ratios. However, conventional honeycomb composite structures have difficulty meeting modern protective requirements. This study innovatively introduces a biomimetic tortoise-back and tendon structure to design a Tortoise-back-reinforced Elliptical-embedded Honeycomb Composite Structure (TEHS), investigating its dynamic responses and energy absorption characteristics under blast loading. Results indicate that the TEHS primarily exhibits localized large-deformation damage under blast loading, with energy absorption concentrated in both local deformation and global response stages. Parametric analysis reveals that cell length, cell wall thickness, and number of layers significantly influence the overall energy absorption capacity, meanwhile core height ratio has negligible impact on total energy absorption but drastically alters energy distribution patterns among structural components. Through analyzing dynamic yielding and response mechanisms, a mathematical model for predicting residual deflection under blast loading was established, which accurately predicts the final structural deformations.

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龟背增强椭圆嵌入蜂窝复合结构：爆炸荷载下响应的实验与数值分析

蜂窝复合材料结构具有高比能吸收和高强重比等优点，在防护工程中受到广泛关注。然而，传统的蜂窝复合材料结构已难以满足现代防护要求。本研究创新性地引入仿生龟背筋结构，设计了龟背筋增强椭圆嵌入蜂窝复合材料结构（TEHS），研究了其在爆炸荷载作用下的动力响应和能量吸收特性。结果表明：爆炸荷载作用下TEHS主要表现为局部大变形损伤，能量吸收集中在局部变形和整体响应阶段；参数分析表明，胞长、胞壁厚度和层数对总吸能能力有显著影响，而芯高比对总吸能的影响可以忽略不计，但会显著改变结构构件间的能量分布规律。通过对结构动态屈服机理和响应机理的分析，建立了爆炸荷载作用下残余挠度预测的数学模型，能准确预测结构最终变形。

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来源期刊

Composite Structures 工程技术-材料科学：复合

CiteScore

12.00

自引率

12.70%

发文量

1246

审稿时长

78 days

期刊介绍： The past few decades have seen outstanding advances in the use of composite materials in structural applications. There can be little doubt that, within engineering circles, composites have revolutionised traditional design concepts and made possible an unparalleled range of new and exciting possibilities as viable materials for construction. Composite Structures, an International Journal, disseminates knowledge between users, manufacturers, designers and researchers involved in structures or structural components manufactured using composite materials. The journal publishes papers which contribute to knowledge in the use of composite materials in engineering structures. Papers deal with design, research and development studies, experimental investigations, theoretical analysis and fabrication techniques relevant to the application of composites in load-bearing components for assemblies, ranging from individual components such as plates and shells to complete composite structures.