Thermal postbuckling and thermally induced postbuckled flutter of tri-directional functionally graded plates in yawed supersonic flow

IF 5 1区工程技术 Q1 ENGINEERING, AEROSPACE Aerospace Science and Technology Pub Date : 2024-08-17 DOI:10.1016/j.ast.2024.109491

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Abstract

The current work examines the thermal postbuckling, aero-elastic flutter and thermally induced postbuckled flutter about a static equilibrium state of tri-directional functionally graded (TFGM) rectangular and tapered plates in yawed supersonic flow. Based on the von Kármán nonlinear strains, the general higher-order shear deformation theory (GHSDT) and the first-order piston theory, the governing equations of motion for TFGM plates in yawed supersonic flow are established via the Hamilton's principle. The isogemetric analysis (IGA), the load continue strategy associated with the Newton Raphson iterative technique are exploited synthetically to capture the postbuckling paths, and then the postbuckled flutter behaviors are acquired with the static equilibrium state being obtained. Comparative and convergence studies are provided to improve reliabilities of the present material model, formulae and code implementations. Subsequently, detailed parametric investigations are carried out to evaluate the influences of material volume fractions, boundary conditions and airflow angles on the thermal postbuckling, aero-elastic flutter and postbuckled flutter behaviors of TFGM plates. The results show that it is the in-plane volume fractions, rather than the thickness volume fraction, that exert a greater influence on the thermal postbuckling and flutter behaviors of TFGM plates. Furthermore, TFGM plates exhibit more diverse postbuckling paths and more complex deformations due to the inhomogeneity of the in-plane material properties compared with z-directional FGM plates.

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偏航超音速流动中三向功能分级板的热后屈曲和热诱导后屈曲扑动

本研究探讨了偏航超音速气流中三向功能分级（TFGM）矩形板和锥形板围绕静态平衡状态的热后屈曲、气动弹性扑动和热诱导后屈曲扑动。基于 von Kármán 非线性应变、一般高阶剪切变形理论（GHSDT）和一阶活塞理论，通过汉密尔顿原理建立了 TFGM 板在偏航超音速流中的支配运动方程。利用与牛顿-拉斐尔森迭代技术相关的等方位分析（IGA）和载荷持续策略合成捕捉后屈曲路径，然后获得后屈曲扑动行为，并得到静态平衡状态。通过比较和收敛研究，提高了现有材料模型、公式和代码执行的可靠性。随后，进行了详细的参数研究，以评估材料体积分数、边界条件和气流角度对 TFGM 板的热后屈曲、气动弹性扑动和后屈曲扑动行为的影响。结果表明，对 TFGM 板的热后屈曲和扑动行为产生较大影响的是面内体积分数，而不是厚度体积分数。此外，与 Z 方向的 FGM 板相比，TFGM 板由于面内材料特性的不均匀性而表现出更多样的后屈曲路径和更复杂的变形。

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来源期刊

Aerospace Science and Technology 工程技术-工程：宇航

CiteScore

10.30

自引率

28.60%

发文量

654

审稿时长

54 days

期刊介绍： Aerospace Science and Technology publishes articles of outstanding scientific quality. Each article is reviewed by two referees. The journal welcomes papers from a wide range of countries. This journal publishes original papers, review articles and short communications related to all fields of aerospace research, fundamental and applied, potential applications of which are clearly related to: • The design and the manufacture of aircraft, helicopters, missiles, launchers and satellites • The control of their environment • The study of various systems they are involved in, as supports or as targets. Authors are invited to submit papers on new advances in the following topics to aerospace applications: • Fluid dynamics • Energetics and propulsion • Materials and structures • Flight mechanics • Navigation, guidance and control • Acoustics • Optics • Electromagnetism and radar • Signal and image processing • Information processing • Data fusion • Decision aid • Human behaviour • Robotics and intelligent systems • Complex system engineering. Etc.