Developing lightweight steel profile and lattice polymeric core composite for structural use

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2024-11-10 DOI:10.1016/j.tws.2024.112697

Ieva Misiūnaitė, Arvydas Rimkus, Viktor Gribniak

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引用次数: 0

Abstract

Embracing modular construction, advanced materials, and digital technologies can drive innovation in the building industry, address global material consumption challenges, and foster a sustainable future. This paper presents the innovative concept of the lightweight hybrid lattice-filled profile (HLFP) for modular engineering, which combines a thin-walled steel tubular shell and additively manufactured lattice structure (AMLS) as a lightweight core. The AMLS achieves precise shape, internal structure, and stiffness, ensuring the decided structural performance with minimum materials. This study provides a theoretical model of HLFP, focusing on adhesively bonded AMLS. The experimental verification demonstrates that the adhesively bonded AMLS ensures an additional 130 % during the elastic stage and, even after partial debonding, maintains 50 % of the mechanical resistance compared to the theoretical sum of the HLFP components. Reducing the infill density does not severely affect the load-bearing capacity of the HLFP—a fourfold decrease of the ALMS density (from 10 % to 2.5 %) results in a 20 % decrease in the ultimate load. However, the sparse lattice structure alters the failure mechanism of ALMS, changing it from favorable ductile to dangerous brittle and determining the object for further optimization. The parametric study reveals the efficiency of the theoretical model for predicting the load-bearing capacity of HLFP. However, the finite element model developed in this study should be used for a more detailed analysis of the HLFP's structural behavior.

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开发结构用轻质型钢和网格聚合物芯材复合材料

采用模块化建筑、先进材料和数字技术可以推动建筑行业的创新，应对全球材料消耗的挑战，并促进可持续发展的未来。本文介绍了用于模块化工程的轻质混合晶格填充型材（HLFP）的创新概念，它结合了薄壁钢管外壳和作为轻质内核的快速成型晶格结构（AMLS）。AMLS 可实现精确的形状、内部结构和刚度，确保以最少的材料实现最佳的结构性能。本研究提供了 HLFP 的理论模型，重点是粘接式 AMLS。实验验证表明，与 HLFP 各组成部分的理论总和相比，粘合型 AMLS 可确保在弹性阶段增加 130%的机械阻力，即使在部分脱粘之后，也能保持 50%的机械阻力。降低填充密度并不会严重影响 HLFP 的承载能力--ALMS 密度降低四倍（从 10% 降至 2.5%）后，极限荷载降低 20%。然而，稀疏的晶格结构改变了 ALMS 的失效机理，使其从有利的韧性变为危险的脆性，并确定了进一步优化的对象。参数研究揭示了理论模型预测 HLFP 承载能力的效率。不过，本研究开发的有限元模型应用于对 HLFP 结构行为进行更详细的分析。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.