Analysis of falling performance of composite skid landing gear

doi:10.19936/j.cnki.2096-8000.20210728.011

Abstract

Abstract: Composite materials have good mechanical properties and have been widely used in aviation field. Compared with the traditional metal landing gear, the composite skid landing gear has the advantages of light weight, corrosion resistance and designability. In order to ensure the safety of composite landing gear in use, it is necessary to study the mechanical properties of composite landing gear. For composite skid landing gear, a falling platform test system is designed and tested. Based on ABAQUS/Explict analysis module, the material user subroutine VUMAT is redeveloped and defined, damage criterion and material stiffness reduction scheme are introduced, and a progressive damage analysis method for composite skid landing gear is established. The numerical results agree well with the test results, which verifies the validity of the model. The results show that the stress and strain of the fuselage-skid connection and the variable thickness area of the composite layers are higher during the falling of the composite skid landing gear. In condition Ⅱ, composite skid landing gear may cause certain matrix damage at the clamp connection after landing.

Key words: composite material, skid landing gear, drop test, explicit dynamics, progressive damage

CLC Number:

TB332

WU Yu-gen, MAO Chun-jian, ZHOU Zhong-bin, ZHONG Mao-ping. Analysis of falling performance of composite skid landing gear[J]. COMPOSITES SCIENCE AND ENGINEERING, 2021, 0(7): 68-75.

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