Weight Reduction of Landing-Gear’s Shock Strut for AT-3 Aircraft

Abstract

The weight of an aircraft is a key parameter that affects the flight distance between the takeoff and landing For a fighter the ability to take off and land in the short field becomes one of the indicators for judging the merits and demerits In addition the weight reduction can also reduce the fuel consumption which further decreases the operation cost In recent years the development of new advanced trainer aircraft is in full swing The landing gear system which accounts for 3 to 6% weight of the aircraft is an important issue in terms of maintaining the structural strength and achieving lightweight Since the composite materials have high strength rigidity corrosion resistance and light weight characteristics the purpose of this study is to use the cladding method to employ the composite for the shock absorber of the main wheel on the AT-3 advanced trainer A composite material skin layer is attached to the shock struts with reduced thickness and the analysis is performed by the CAD software Inventor and the finite element software ANSYS Workbench software by using the approximated external loads The maximum equivalent stress and Tsai-Wu failure criteria were used to determine whether the overall design meets the requirements for various combinations of composite layups The design with UD carbon fiber prepregs in a thickness of 0 25 mm and laid up in [?45?^°/?-45?^°/0^°/-?45?^°/?90?^°/?45?^°/0^°/├ ?-45?^° ]_4 ┤ sequence can meet the demand by reducing the total weight while preserving the original strength

Date of Award	2020
Original language	English
Supervisor	Wen-Bin Young (Supervisor)