A simplified approach for local buckling in metal-faced profiled sandwich panels

IF 1.2 4区工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY

Proceedings of the Institution of Civil Engineers-Structures and Buildings Pub Date : 2024-03-20 DOI:10.1680/jstbu.23.00061

Muhammad Naeem Tahir, Ehab Hamed

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引用次数: 0

Abstract

Local buckling (wrinkling) is very common in metal-faced insulating sandwich panels (MFISPs) due to the small thickness of their face sheets. In some cases, wrinkling leads to sudden failures, while in others it leads to degradation of the overall stiffness and can decrease the failure load. A simplified finite-element modelling approach is presented to estimate the local buckling pressure of such panels. In the proposed approach, only the face sheet under compression is modelled, thus avoiding the need to perform a full three-dimensional (3D) structural analysis. The working assumption is that the relative deflection of the buckled face against the face under tension (unbuckled face) can be modelled using a two-parameter elastic foundation approach. The elastic foundation is simulated by closely spaced horizontal and vertical springs that model the rigidities of the foam core. Two models are used to determine the elastic foundation properties. The simplified approach was validated through comparisons with 3D analyses of full sandwich panels and available experimental results. It was found that the proposed approach can be applied to various types of MFISPs (flat or heavily profiled) with a variety of foam cores and face sheet thicknesses.

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金属面异型夹芯板局部屈曲的简化方法

由于金属面绝热夹芯板（MFISPs）的面板厚度较小，因此局部屈曲（起皱）在这种板材中非常常见。在某些情况下，起皱会导致突然失效，而在另一些情况下，起皱会导致整体刚度下降，并降低失效载荷。本文介绍了一种简化的有限元建模方法，用于估算此类面板的局部屈曲压力。在所提出的方法中，只对受压面板进行建模，因此无需进行完整的三维（3D）结构分析。工作假设是，可使用双参数弹性地基方法模拟受压面相对于受拉面（未受压面）的相对挠度。弹性地基由紧密间隔的水平和垂直弹簧模拟，模拟泡沫芯材的刚度。两个模型用于确定弹性地基属性。通过与完整夹芯板的三维分析和现有实验结果进行比较，对简化方法进行了验证。结果表明，所提出的方法可应用于具有各种泡沫夹芯和面板厚度的各种类型的多层夹芯板（平板或重剖面）。

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

Proceedings of the Institution of Civil Engineers-Structures and Buildings 工程技术-工程：土木

CiteScore

3.40

自引率

6.20%

发文量

审稿时长

12 months

期刊介绍： Structures and Buildings publishes peer-reviewed papers on the design and construction of civil engineering structures and the applied research associated with such activities. Topics include the design, strength, durability and behaviour of structural components and systems. Topics covered: energy conservation, people movement within and around buildings, strength and durability of steel and concrete structural components, and the behaviour of building and bridge components and systems