Simulation of the aircraft landing gear legs with the plastically deformable shock absorbers
Authors: Sumerin A.A., Shcheglov G.A.
Published in issue: #6(138)/2023
DOI: 10.18698/2308-6033-2023-6-2284
Category: Aviation and Rocket-Space Engineering | Chapter: Strength and Thermal Conditions of Aircraft
The paper considers possibility of using a new depreciation scheme in regard to the wheeled three-column landing gear leg of the aerospace light aircraft based on using the three-section one-time crash box, which could be replaced during the inter-flight maintenance. Normal and abnormal operation of the landing gear legs was numerically simulated in the LS-DYNA package of the ANSYS software. Energy absorbing characteristics of the crash boxes with various geometry and several landing gear leg schemes were analyzed in order to identify the design having most predictable and forecasted deformations, as well as the balanced energy absorbing characteristics. It is shown that using the crash boxes, similar in design to those used in the vehicle passive safety systems, could significantly reduce the landing gear system weight of an orbital aerospace vehicle, while maintaining the required energy absorbing characteristics of the landing gear. Gain in weight compared to the aircraft classic shock absorber being similar in landing weight to that presented in the work was of 18.4 kg, or by 12.5 times.
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