Stiffener-skin interactions in pressure-loaded composite panelsThe effects of flange thickness, web height, and skin stiffness on the strain distributions in the skin-stiffener interface region of pressure-loaded graphite-epoxy panels, stiffened by the type-T stiffener, were examined at pressure levels up to one atmosphere. The results indicate that at these pressures geometric nonlinearities are important, and that the overall stiffener stiffness has a significant effect on panel response, particularly on the out-of-plane deformation or pillowing of the skin. The strain gradients indicated that the interface between the skin and the stiffener experiences two components of shear stress, in addition to a normal (peel) stress. Thus, the skin-stiffener interface problem is a three-dimensional problem rather than a two-dimensional one, as is often assumed.
Document ID
19860054090
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Loup, D. C. (David Taylor Naval Ship Research and Development Center Bethesda, MD, United States)
Hyer, M. W. (Maryland, University College Park, United States)
Starnes, J. H., Jr. (NASA Langley Research Center Hampton, VA, United States)