Abstract
FOR HYPERSONIC VEHICLES Gregory P. Clifft Timothy M. Wilson, John M. Coyle / ' i McDonnell Douglas Corporation St. Louis, Missouri Linear structural theory has traditionally provided the basis for flight vehicle analysis and design. Structural testing has verified the linear approach an acceptable analysis tool. Hypersonic vehicle designs, such as the National Aerospace Plane (NASP), will require advanced structural concepts which are difficult to analyze with linear theory. Conservatisms inherent in linear theory may lead to a nonoptimum structure. In addition, the NASP will be subject to complex combined thermal-mechanical loadings which cannot be accurately analyzed using linear theory. The need for an analysis approach that can remove the conservatisms but still correctly handle complex loadings needs to be developed.
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