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131 results on '"Fei, Qingguo"'

1. Research progress on aircraft lightweight design of ceramic matrix composites

Author

MA Yu, ZHANG Dahai, WU Jun, JING Rui, XU Peifei, and FEI Qingguo

Subjects
aircraft, ceramic matrix composites, thermal protection structure, lightweight structure, Motor vehicles. Aeronautics. Astronautics, TL1-4050
Abstract

High Mach flight has put forward more stringent requirements for the material and structure design of new generation of high-speed vehicles. This paper reviews the application of ceramic matrix composites（CMCs） in the structural design of aircraft from the aspects of selection，application，and evaluation，and then the future development direction is put forward to provide reference for aircraft ceramic matrix composite structure design. The selection criteria and corresponding preparation methods of CMCs in different application scenarios are comprehensively reviewed，the typical applications of CMCs in aircraft structures are systematically introduced，and the evaluation criteria and ground test methods of the materials under near-service conditions are analyzed. To order to meet the future demands of aircraft，it is necessary to integrate computer-aided optimization technology and innovative preparation methods to enhance the temperature resistance and fatigue performance of CMCs. Developing highly reliable，long-life joining techniques and integrated design solutions will fully leverage the advantages of these materials. Additionally，in-situ characterization techniques under multi-physical field coupling need to be developed to obtain the performance evolution behaviour of CMCs in actual use，providing a reliable basis for the lightweight structural design of aircraft.

Published
2024
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2. Nonlinear Dynamic Modeling of a Tether-net System for Space Debris Capture

Author

Huang, Weicheng, He, Dongze, Li, Yanbin, Zhang, Dahai, Zou, Huaiwu, Liu, Hanwu, Yang, Wenmiao, Qin, Longhui, and Fei, Qingguo

Subjects
Mathematics - Numerical Analysis, Condensed Matter - Soft Condensed Matter
Abstract

In this paper, a flexible tether-net system is applied to capture the space debris and a numerical framework is established to explore its nonlinear dynamic behaviors, which comprises four principal phases: folding, spreading, contacting, and closing. Based on the discretization of the whole structure into multiple nodes and connected edges, elastic force vectors and associated Jacobian matrix are derived analytically to solve a series of equations of motion. With a fully implicit method applied to analyze the nonlinear dynamics of a slender rod network, the involved mechanical responses are investigated numerically accounting for the interactions. Contact between the deformable net and a rigid body is handled implicitly through a cost-effective modified mass algorithm while the catenary theory is utilized to guide the folding process (from planar configuration to origami-like pattern). The dragging and spreading actions for the folded hexagon net could be realized by shooting six corner mass toward a specific direction; next, the six corners would be controlled to move along a prescribed path producing a closing gesture, when touch between the flying net and the target body is detected, so that for the space debris could be captured and removed successfully. We think the established discrete model could provide a novel insight in the design of active debris removal (ADR) techniques, and promote further development of the model-based control of tether tugging systems., Comment: 19 pages, 18 figures

Published
2022

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