Stress Analysis of Composite wing of SARAS Aircraft at extreme operating temperatures

Kumari, Asha and Kotresh, Gaddikeri M and Byji, Varughese (2010) Stress Analysis of Composite wing of SARAS Aircraft at extreme operating temperatures. Project Report. NAL, Bangalore.

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Abstract

This report presents the FE stress analysis of SARAS Composite wing due to thermal load and structural loads (flight and landing loads). This structure is expected to operate at extreme temperature (-54OC and 71°C). The stress analysis of composite wing with these thermal loads along with structural loads assumes more importance in view of the directional dependence of co-efficient of thermal expansion between various members. The joints between metallic landing beams and surrounding composite structure are investigated. These joints are subjected to shear transfer at the fastener locations due to difference in co-efficient of thermal expansion between composite and metallic materials. FE analysis of wing is carried out with combination of thermal and critical flight and landing load cases. FE analysis shows that the structure is safe from strength point of view. Failure-indies are less than 1.0. Also, the fasteners forces and corresponding bearing stresses are calculated at the landing gear beam joint to composite structure. The margin of safety for fasteners shear and bearing are positive showing that the joints are safe.

Item Type: Proj.Doc/Technical Report (Project Report)
Uncontrolled Keywords: Temperature;Thermal load;Fasteners;Failure-index;Static Analysis
Subjects: AERONAUTICS > Aerodynamics
AERONAUTICS > Aircraft Design, Testing & Performance
Division/Department: Advanced Composites Division, Advanced Composites Division, Advanced Composites Division
Depositing User: Mr Nisanth
Date Deposited: 02 Aug 2010 11:03
Last Modified: 02 Aug 2010 11:03
URI: http://nal-ir.nal.res.in/id/eprint/8875

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