Wire arc additively manufactured aluminium alloy open sections: 3D geometric analysis and compressive behaviour

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2026-05-01 Epub Date: 2026-02-16 DOI:10.1016/j.tws.2026.114687

Jin Li , Ziyi Wang , Man-Tai Chen , Andi Su , Ou Zhao

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引用次数: 0

Abstract

Wire arc additive manufacturing (WAAM) is sparking extensive research interests in recent years, as the technique offers an efficient pathway fabricating metallic structural components with complex geometries. However, the limited insights into the structural performance of WAAM metallic members hinder their practical application in construction. As part of an ongoing research project on WAAM metallic members, this paper presents an experimental study on the geometric features and cross-section compressive behaviour of WAAM aluminium alloy open section stub columns. Fifteen stub column specimens with angle, channel and π-shaped section profiles were firstly printed using ER5356 aluminium alloy feedstock wires and tested under compression to study their local buckling behaviour. Before testing, the geometric properties and geometric imperfections (including initial local geometric imperfections and cross-section out-of-squareness) of the specimens were inspected using a 3D laser scanner. The measured initial local geometric imperfections and out-of-squareness of each specimen were analysed. The results from stub column tests were subsequently used to assess the applicability of cross-section classifications and predicted resistances from existing design methods (for conventionally fabricated aluminium alloy members), including the European, American and Australian/New Zealand codes, together with the continuous strength method (CSM). The assessment results generally revealed that (i) the three sets of codified slenderness limits provided safe cross-section classification, with more accurate classification offered by the American specification and Australian/New Zealand standard and (ii) the three design codes provided safe compression resistance predictions (though conservative to different extents, especially for the stocky cross-sections), while the Annex H of the European code and the CSM provided more accurate and consistent resistance predictions due to their proper consideration of material strain hardening.

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电弧增材制造铝合金开口截面：三维几何分析和压缩性能

电弧增材制造（WAAM）近年来引起了广泛的研究兴趣，因为该技术为制造具有复杂几何形状的金属结构部件提供了有效的途径。然而，对WAAM金属构件结构性能的认识有限，阻碍了其在建筑中的实际应用。作为正在进行的WAAM金属构件研究项目的一部分，本文对WAAM铝合金开截面短柱的几何特征和截面压缩行为进行了实验研究。采用ER5356铝合金给料丝首次打印了15个具有角形、槽形和π形截面的短柱试件，并进行了压缩试验，研究了它们的局部屈曲行为。在测试前，使用三维激光扫描仪检测试样的几何特性和几何缺陷（包括初始局部几何缺陷和横截面不垂直）。分析了测量到的每个试样的初始局部几何缺陷和不垂直度。短柱试验的结果随后用于评估截面分类的适用性和现有设计方法（用于常规制造的铝合金构件）的预测阻力，包括欧洲、美国和澳大利亚/新西兰规范，以及连续强度法（CSM）。评估结果总体显示：(1)3套长细限制规范提供了安全截面分类，其中美国规范和澳大利亚/新西兰标准提供了更准确的分类；(2)3套设计规范提供了安全抗压性能预测（但有不同程度的保守性，特别是对于粗大截面）。而欧洲规范的附件H和CSM由于适当考虑了材料应变硬化，提供了更准确和一致的电阻预测。

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.