Local 3-D stress analysis of metallic front and rear landing gear beams of SARAS-composite wing

Kumari, Asha and Murali Krishna, D and Kotresh, Gaddikeri M and Byji, Varughese (2010) Local 3-D stress analysis of metallic front and rear landing gear beams of SARAS-composite wing. Project Report. NAL, Bangalore.

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This report presents the local 3D stress analysis of metal front and rear-beam of SARAS composite wing. By the 2-D global analysis of wing, it is found that there is stress concentration where pintle pin is attached to the beam. To capture the detail stress distribution around the cylindrical pintle pin-hole surface and to check the safety of the landing-gear-beam attachment area, a fine three-dimensional modeling is done on the beam between sta#5 to sta#6. The 3-D model is integrated to 2-D model of global wing. For loading purpose, the bearing reactions obtained at pintle-pin area from 2-D analysis is distributed at the beam interface as sinusoidal variation. The axial-force is applied as pressure under bush collar area of the beam. FE analysis is carried out for all landing and ground handling load cases (21 cases) for ultimate design loading condition. VonMises stress at one of the horizontal gusset of landing- gear-front beam attachment area is found more than the yield-stress of material for tail-down landing spring back load case. Though modification in the gusset is carried out to improve the stress in gusset. Further analysis show that attachments are safe fiom stress point of view. This modification is implemented in detail design.

Item Type: Monograph (Project Report)
Uncontrolled Keywords: Pintle-pin;Landing-gear-beams attachment;FE Analysis;Stress
Subjects: AERONAUTICS > Aerodynamics
AERONAUTICS > Aircraft Design, Testing & Performance
Depositing User: Mr Nisanth
Date Deposited: 02 Aug 2010 05:33
Last Modified: 02 Aug 2010 05:33
URI: http://nal-ir.nal.res.in/id/eprint/8874

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