Thermomechanical Behaviors of a Novel Double-Layer Corrugated Core Structure for Thermal Protection System

IF 1.1 4区工程技术 Q3 ENGINEERING, AEROSPACE

International Journal of Aerospace Engineering Pub Date : 2023-07-17 DOI:10.1155/2023/5315977

Bin Li, Zixuan Hang, Ting Dai

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引用次数: 0

Abstract

Corrugated core sandwich structures have great potential in the application to thermal protection system of aerospace vehicles. However, the traditional layout of web plates could inevitably lead to thermal short effects and high risk of buckling failure of the integrated thermal protection system (ITPS). In this paper, a novel double-layer ITPS is proposed by splitting and reorganizing a classical corrugated sandwich structure without additional introducing of weight. Distribution types of parallel, symmetric, and orthogonal of the double layers are designed and studied in detail. Basic theory of the thermomechanical problem as well as finite element simulation is carried out to study the responses of the ITPS. Numerical results show that the orthogonal type has more excellent yield resistance at high temperature and large temperature gradient than the others, while the parallel type has a relatively stronger buckling resistance. In addition, the structural stiffness variation caused by temperature dependencies of material parameters is greater than that caused by thermal stress, which shows the significance of consideration of temperature-dependent material properties in structure vibration analysis.

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用于热保护系统的新型双层波纹芯结构的热机械性能

波纹夹芯结构在航空航天飞行器热防护系统中具有巨大的应用潜力。然而，传统的腹板布局不可避免地会导致集成热保护系统（ITPS）的热短路效应和高屈曲失效风险。本文在不增加重量的情况下，通过对经典的波纹夹层结构进行拆分和重组，提出了一种新型的双层ITPS。详细设计和研究了双层的平行、对称和正交分布形式。通过热力学问题的基本理论和有限元模拟研究了ITPS的响应。数值结果表明，正交型在高温和大温度梯度下比其他类型具有更好的抗屈服性能，而平行型具有相对更强的抗屈曲性能。此外，材料参数的温度依赖性引起的结构刚度变化大于热应力引起的刚度变化，这表明在结构振动分析中考虑温度依赖性材料特性的重要性。

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

International Journal of Aerospace Engineering ENGINEERING, AEROSPACE-

CiteScore

2.70

自引率

7.10%

发文量

195

审稿时长

22 weeks

期刊介绍： International Journal of Aerospace Engineering aims to serve the international aerospace engineering community through dissemination of scientific knowledge on practical engineering and design methodologies pertaining to aircraft and space vehicles. Original unpublished manuscripts are solicited on all areas of aerospace engineering including but not limited to: -Mechanics of materials and structures- Aerodynamics and fluid mechanics- Dynamics and control- Aeroacoustics- Aeroelasticity- Propulsion and combustion- Avionics and systems- Flight simulation and mechanics- Unmanned air vehicles (UAVs). Review articles on any of the above topics are also welcome.