Dynamic instability analysis of folded sandwich plates with honeycomb core via conforming multi-patch isogeometric analysis including design considerations

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-10-01 DOI:10.1016/j.tws.2025.114050

Mohammad Reza Ghovehoud, Mojtaba Azhari, Saeid Sarrami

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引用次数: 0

Abstract

This article investigates the dynamic instability of folded sandwich plate structures through a meticulous and comprehensive approach. These structures comprise sandwich plates with a honeycomb core and aluminum protective layers, which serve as their primary components. The governing equations are derived using the first-order shear deformation theory (FSDT) to analyze the dynamic instability. Given that each folded plate structure comprises multiple plates with varying dimensions and angles, the Conforming Multi-patch Isogeometric method is employed to accurately model the structure and solve the governing equations. The results obtained are compared with data from reputable published studies to validate the accuracy and reliability of the proposed Isogeometric analysis (IGA) method. This comparison confirms the method’s credibility and highlights its high precision in evaluating the dynamic stability of folded plate structures. Furthermore, the study investigates the influence of various parameters on the dynamic stability performance of these structures. It also examines how the geometric and mechanical properties of honeycomb cores, specifically hexagonal and re-entrant structures in combined cell geometries, affect the dynamic stability of the structure under different conditions.

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考虑设计因素的蜂窝芯折叠夹层板的多块等几何分析

本文对折叠夹层板结构的动力失稳进行了细致而全面的研究。这些结构包括蜂窝芯的夹层板和铝保护层，这是它们的主要组成部分。利用一阶剪切变形理论（FSDT）推导了控制方程，分析了结构的动力失稳。考虑到每个折叠板结构由多个不同尺寸和角度的板组成，采用多贴片等几何方法对结构进行精确建模并求解控制方程。所得结果与已发表的知名研究的数据进行了比较，以验证所提出的等几何分析（IGA）方法的准确性和可靠性。通过比较，证实了该方法的可靠性，突出了其在评估折叠板结构动力稳定性方面的高精度。此外，研究了各种参数对结构动力稳定性能的影响。它还研究了蜂窝芯的几何和机械性能，特别是组合单元几何中的六角形和重入结构，如何影响不同条件下结构的动态稳定性。

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.