The Influence Of Restraint Systems On Panel Behavior

Conference paper
Part of the Conference Proceedings of the Society for Experimental Mechanics Series book series (CPSEMS)


When a panel is tested in uniaxial compression in a test machine, the boundary conditions are not quite the same as they would be if it were part of a complete structure. A restraint system may be used to simulate conditions found in a complete vehicle. Quantifying the quality of the restraint with only point-measurement devices can leave an inadequate characterization of the out-of-plane behavior. However, today’s full-field displacement monitoring techniques allow for much more accurate views of the global panel deformation and strain, and therefore allow for a better understanding of panel behavior. In the current study, the behavior of a hat-stiffened and two rod-stiffened carbon-epoxy panels is considered. Panels were approximately 2 meters tall and 0.76 to 1.06 m wide. Unloaded edges were supported by knife edges and stiffeners were attached to a support structure at selected locations to restrain out-of-plane motion. A comparison is made between test results based on full-field measurements and analyses based on assumptions of boundary conditions of a completely rigid edge restraint and the absence of any edge restraint. Results indicate that motion at the restrained edges must be considered to obtain accurate test-analysis correlation.


Failure Load Frame Location Local Buckle Frame Support Stiffened Panel 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    Velicki, Alex, “Damage Arresting Composites for Shaped Vehicles, Phase I Final Report, NASA CR-2009-215932, September 2009.Google Scholar
  2. 2.
    McGowan, David M., Ambur, Damodar R., and McNeil, Stephen R. 2003. “Full-field Structural Response of Composite Structures: Analysis and Experiment,” presented at the 44th AIAA/ASME/ASCE/AHS Structures, Dynamics and Materials Conference, AIAA 2003–1623, Norfolk, VA, April 2003.Google Scholar
  3. 3.
    Rankin, C. C., Brogan, F. A, Loden, W. A., and Cabiness, H. D. 2001. "STAGS User Manual, Version 4.0." Lockheed Martin Missiles and Space Company, Incorporated.Google Scholar

Copyright information

© Springer Science+Businees Media, LLC 2011

Authors and Affiliations

  1. 1.NASA Langley Research CenterHamptonUSA

Personalised recommendations