Aero-thermo-elastic behaviour of variable stiffness composite laminates and sandwich panels with temperature-dependent material properties

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2026-05-01 Epub Date: 2026-02-27 DOI:10.1016/j.tws.2026.114738

J.A. Moreira , F. Moleiro , A.L. Araújo , A. Pagani

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引用次数: 0

Abstract

This work is focused on the evaluation of the impact of temperature-dependent material properties on the linear aero-thermo-elastic flutter and buckling stability of variable stiffness composite laminates and sandwich panels with curvilinear fibres under supersonic airflow and thermal loads. To ensure a proper structural modelling, an assessment of Equivalent Single Layer and Layerwise models is also provided, involving the First- and Third-order Shear Deformation Theories as well as further refined theories based on high-order Lagrange

z

-expansions with thickness stretching. Numerical applications are centred on graphite-epoxy composite laminates and PVC foam core sandwich panels, with either unidirectional or curvilinear fibres, considering simply supported and clamped boundary conditions. It is concluded that temperature-dependent material properties can substantially decrease both critical buckling temperatures and flutter boundaries, depending on the fibre orientations, thermal expansion coefficients and boundary conditions. In particular, the temperature-dependency of the core material plays a major role on the aero-thermo-elastic stability of sandwich panels. Ultimately, the models accuracy assessment reveals that high-order theories are necessary to attain highly accurate flutter estimations for temperatures close to the critical buckling temperature, especially when considering curvilinear fibres and temperature-dependent material properties.

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具有温度相关材料特性的变刚度复合材料层压板和夹芯板的气动热弹性行为

本文研究了在超音速气流和热载荷作用下，温度相关材料性能对变刚度曲线纤维复合材料层合板和夹层板的线性气动热弹性颤振和屈曲稳定性的影响。为了确保正确的结构建模，还提供了等效单层和分层模型的评估，包括一阶和三阶剪切变形理论，以及基于高阶拉格朗日z-展开的厚度拉伸的进一步改进理论。数值应用集中在石墨-环氧复合材料层压板和PVC泡沫芯夹层板上，具有单向或曲线纤维，考虑简单支撑和夹紧的边界条件。结果表明，与温度相关的材料性能可以显著降低临界屈曲温度和颤振边界，这取决于纤维取向、热膨胀系数和边界条件。特别是芯材的温度依赖性对夹芯板的气动热弹性稳定性起着重要的作用。最后，模型的精度评估表明，对于接近临界屈曲温度的温度，特别是考虑到曲线纤维和温度相关的材料特性时，需要高阶理论来获得高精度的颤振估计。

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.