Effects of Tangential Edge Constraints on the Postbuckling Behavior of Flat and Curved Panels Subjected to Thermal and Mechanical Loads

Technical Report · Tue Nov 01 04:00:00 EST 1994

OSTI ID:266975

Lin, W; Librescu, L; Nemeth, M P; Starnes, Jr, J H

A parametric study of the effects of tangential edge constraints on the postbuckling response of flat and shallow curved panels subjected to thermal and mechanical loads is presented. The mechanical loads investigated are uniform compressive edge loads and transverse lateral pressure. The temperature fields considered are associated with spatially nonuniform heating over the panels, and a linear through-the-thickness temperature gradient. The structural model is based on a higher-order transverse-shear-deformation theory of shallow shells that incorporates the effects of geometric nonlinearities, initial geometric imperfections, and tangential edge motion constraints. Results are presented for three-layer sandwich panels made from transversely isotropic materials. Simply supported panels are considered in which the tangential motion of the unloaded edges is either unrestrained, partially restrained, or fully restrained. These results focus on the effects of the tangential edge restraint on the postbuckling response. The results of this study indicate that tangentially restraining the edges of a curved panel can make the panel insensitive to initial geometric imperfections in some cases.

• Research Organization: Virginia Polytechnic Inst. and State Univ., Blacksburg, VA (United States)
• OSTI ID: 266975
• Report Number(s): N--96-26516; NASA-TM--111522; NAS--1.15:111522; NIPS--96-50858; CNN: NAG1-1300
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BOUNDARY-VALUE PROBLEMS
BUCKLING
COMPOSITE MATERIALS
PANELS
PRESSURE DEPENDENCE
TEMPERATURE DEPENDENCE
TEMPERATURE DISTRIBUTION
TEMPERATURE GRADIENTS
THERMOELASTICITY