Compression response and optimization design of a novel glass-sponge inspired lattice structure with enhanced energy absorption capacity

IF 5 1区工程技术 Q1 ENGINEERING, AEROSPACE

Aerospace Science and Technology Pub Date : 2024-09-16 DOI:10.1016/j.ast.2024.109582

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引用次数: 0

Abstract

Lattice structures have shown tremendous prospects in engineering fields, because of the ultralight, strong and toughness properties. In this paper, a novel configuration of lattice structure (GSIBCC) inspired by the hierarchical skeleton system of glass sponges is proposed. The new configuration of the unit cell is based on modifying the inner cross struts of the body-centered cubic (BCC) lattice, by considering the double diagonal reinforcements and hybridization of unit cells. The compression properties and deformation mechanism of the GSIBCC lattice structure are compared with BCC, OCT (Octet) and other glass sponge inspired lattices. A multi-objective optimization method is established, for maximizing the specific energy absorption (SEA) and simultaneously reducing the compression strength. The novel GSIBCC lattice exhibits superior specific energy absorption than BCC, OCT, and other glass sponge inspired lattices. For example, GSIBCC shows maximum 145.06% improvement (

\bar{ρ}

=0.124) of SEA with respect to BCC, and maximum 117.4% improvement (

\bar{ρ}

=0.124) of SEA with respect to OCT. The novel lattice exhibits the whole deformation type and obvious second stress reinforcement effect. Besides, the mechanical properties of GSIBCC are further improved using the multi-objective optimization. The reported biomimicry design strategy, deformation and failure mechanism, and multi-objective optimization method will be beneficial for enriching the lattice system and promoting the multifunctional applications of lattice structures in engineering fields.

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具有更强能量吸收能力的新型玻璃海绵晶格结构的压缩响应和优化设计

晶格结构因其超轻、高强度和韧性等特性，在工程领域展现出巨大的发展前景。本文受玻璃海绵分层骨架系统的启发，提出了一种新型晶格结构构型（GSIBCC）。新的单元格构型是在体心立方（BCC）晶格内交叉支柱的基础上，通过考虑双对角线加固和单元格杂化而形成的。将 GSIBCC 晶格结构的压缩性能和变形机制与 BCC、OCT（Octet）和其他受玻璃海绵启发的晶格进行了比较。建立了一种多目标优化方法，以最大限度地提高比能量吸收（SEA），同时降低压缩强度。与 BCC、OCT 和其他受玻璃海绵启发的晶格相比，新型 GSIBCC 晶格表现出更优越的比能量吸收能力。例如，与 BCC 相比，GSIBCC 的比能吸收率最大提高了 145.06%（ρ¯=0.124）；与 OCT 相比，GSIBCC 的比能吸收率最大提高了 117.4%（ρ¯=0.124）。新颖的晶格表现出整体变形类型和明显的二次应力强化效果。此外，通过多目标优化还进一步提高了 GSIBCC 的力学性能。所报道的仿生物设计策略、变形与失效机理以及多目标优化方法将有利于丰富晶格体系，促进晶格结构在工程领域的多功能应用。

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来源期刊

Aerospace Science and Technology 工程技术-工程：宇航

CiteScore

10.30

自引率

28.60%

发文量

654

审稿时长

54 days

期刊介绍： Aerospace Science and Technology publishes articles of outstanding scientific quality. Each article is reviewed by two referees. The journal welcomes papers from a wide range of countries. This journal publishes original papers, review articles and short communications related to all fields of aerospace research, fundamental and applied, potential applications of which are clearly related to: • The design and the manufacture of aircraft, helicopters, missiles, launchers and satellites • The control of their environment • The study of various systems they are involved in, as supports or as targets. Authors are invited to submit papers on new advances in the following topics to aerospace applications: • Fluid dynamics • Energetics and propulsion • Materials and structures • Flight mechanics • Navigation, guidance and control • Acoustics • Optics • Electromagnetism and radar • Signal and image processing • Information processing • Data fusion • Decision aid • Human behaviour • Robotics and intelligent systems • Complex system engineering. Etc.