Prebuckling and Postbuckling Response of Tailored Composite Stiffened Panels with Axial-Shear CouplingResults of a numerical parametric study of the prebuckling and postbuckling response of tailored composite stiffened panels with axial-shear coupling are presented. In the stiffened panels, axial-shear stiffness coupling is created by rotating the stiffener orientation and tailoring the skin laminate anisotropy. The panels are loaded in axial compression and the effects of stiffener orientation and skin anisotropy on the panel stiffness, buckling parameters, and axial-shear coupling response are described. Results are obtained from a nonlinear general shell finite element analysis computer code. The prebuckling and postbuckling responses can be affected by both the stiffener orientation and skin laminate anisotropy, and the effects are different and load dependent. The results help identify different mechanisms for axial-shear coupling, and show that a load-dependent structural response can be controlled by selecting appropriate stiffener and skin parameters.
Document ID
20040086740
Acquisition Source
Langley Research Center
Document Type
Other
Authors
Young, Richard D. (NASA Langley Research Center Hampton, VA, United States)
Hyer, Michael W. (Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Starnes, James H., Jr. (NASA Langley Research Center Hampton, VA, United States)