Abstract
Leo Razdolsky Ph.D., P.E., S.E. LR Structural Engineering Inc., President 16 Provincetown Court, Lincolnshire IL. 60069, USA Abstract The aerospace and space sector has traditionally been a promoter for the development and application of advanced engineering materials. The demand for these materials is generally spurred by performance requirements of structural elements and systems. The key driving forces for materials development are weight reduction, application-specific performance improvement, and reduced costs. Matrix composites combine high stiffness and strength with low density and are therefore widely used for lightweight structural applications. In this paper, the effect of high temperature creep on structural system response is investigated. The behavior of a material at high elevated temperatures is expressed in form of a constitutive equation. New probability-based models for describing the behavior of timedependent materials are presented in this paper. Certain criteria have been imposed on selecting the creep functions that has the potential of describing a wide range of material behavior. The results are supported by step-by-step practical structural design examples and should be useful for practicing structural engineers, code developers as well as researches and university faculty personal.
Published Version
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