Computer Modelling of Cyclic Deformation of High-Temperature Materials
Quarterly technical progress rept. 1 Dec 1993-28 Feb 1994
FAIRFAX MATERIALS RESEARCH INC ALEXANDRIA VA
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Current methods of lifetime assessment leave much to be desired. Typically, the expected life of a full-scale component exposed to a complex environment is based upon empirical interpretations of measurements performed on microscopic samples in controlled laboratory conditions. Extrapolation to the service component is accomplished by scaling laws, which, if used at all, are empirical little or no attention is paid to synergistic interactions between the different components of the real environment. With the increasingly hostile conditions which must be faced in modern aerospace applications, improvement in lifetime estimation is mandated by moth cost and safety considerations. This program aims at improving current methods of lifetime assessment by building in the characteristics of the micro-mechanisms known to be responsible for damage and failure. The broad approach entails the integration and, where necessary, augmentation of the micro-scale research results currently available in the literature into a macro-scale model with predictive capability.
- Laminates and Composite Materials