Effect of damage on elastically tailored composite laminatesA variationally consistent theory is derived in order to predict the response of anisotropic thin-walled closed sections subjected to axial load, torsion and bending. The theory is valid for arbitrary cross-sections made of laminated composite materials with variable thickness and stiffness. Closed form expressions for the stiffness coefficients are provided as integrals in terms of lay-ups parameters and cross-sectional geometry. A comparison of stiffness coefficients and response with finite element predictions and a closed form solution is performed. The theory is applied to the investigation of the effect of damage on the extension-twist coupling in a thin-walled closed section beam. The damage is simulated as a progressive ply-by-ply failure. Results show that damage can have a significant effect on the extension-twist coupling.
Document ID
19920064318
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Armanios, Erian (NASA Langley Research Center Hampton, VA, United States)
Badir, Ashraf (NASA Langley Research Center Hampton, VA, United States)
Berdichevsky, Victor (Georgia Institute of Technology Atlanta, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1991
Subject Category
Structural Mechanics
Meeting Information
Meeting: AHS International Specialists'' Meeting on Rotorcraft Basic Research