Compressive resistance of thin-walled pultruded GFRP profiles: The role of delamination examined through experiments and FE simulations

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering Pub Date : 2024-10-29 DOI:10.1016/j.compositesb.2024.111929

José Gonilha , João Alfredo de Lazzari , João Ramôa Correia , Nuno Silvestre

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Abstract

Significant efforts have been made in the last decades to develop design rules and guidelines for composite structures, meeting the increasing interest in pultruded glass fibre reinforced profiles (GFRP) by the construction industry. One aspect that has been difficult to address is the crushing resistance of these profiles, with previous research indicating that the design equations are not conservative, predicting much higher resistances than those obtained in experimental tests. This paper explores the possibility that crushing resistance is governed by tensile failure in the through-thickness direction of the laminates, by Poisson effect, and proposes modifications to a previously presented material damage model to account for this in finite element (FE) simulations. Compressive experimental tests were conducted in stub-column specimens, with 5 different open-section configurations, obtained from three different producers. The test results were compared to analytical and FE simulations, confirming that the former grossly overestimate the resistance, while the latter, with the proposed damage model, compare well with experimental results.

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薄壁拉挤 GFRP 型材的抗压性：通过实验和 FE 模拟研究分层的作用

过去几十年来，随着建筑行业对拉挤玻璃纤维增强型材（GFRP）的兴趣与日俱增，人们为制定复合材料结构的设计规则和准则付出了巨大努力。以往的研究表明，设计方程并不保守，预测的抗压强度远高于实验测试的结果。本文探讨了抗压性受泊松效应支配的层压板厚度方向拉伸破坏的可能性，并提出了对以前提出的材料破坏模型的修改建议，以便在有限元（FE）模拟中考虑到这一点。对来自三个不同生产商的 5 种不同截面结构的短柱试样进行了压缩实验测试。试验结果与分析和有限元模拟结果进行了比较，结果表明，前者严重高估了抗力，而后者与所提出的损伤模型相比，与试验结果相差无几。

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

Composites Part B: Engineering 工程技术-材料科学：复合

CiteScore

24.40

自引率

11.50%

发文量

784

审稿时长

21 days

期刊介绍： Composites Part B: Engineering is a journal that publishes impactful research of high quality on composite materials. This research is supported by fundamental mechanics and materials science and engineering approaches. The targeted research can cover a wide range of length scales, ranging from nano to micro and meso, and even to the full product and structure level. The journal specifically focuses on engineering applications that involve high performance composites. These applications can range from low volume and high cost to high volume and low cost composite development. The main goal of the journal is to provide a platform for the prompt publication of original and high quality research. The emphasis is on design, development, modeling, validation, and manufacturing of engineering details and concepts. The journal welcomes both basic research papers and proposals for review articles. Authors are encouraged to address challenges across various application areas. These areas include, but are not limited to, aerospace, automotive, and other surface transportation. The journal also covers energy-related applications, with a focus on renewable energy. Other application areas include infrastructure, off-shore and maritime projects, health care technology, and recreational products.