Accession Number:

ADA273852

Title:

Computer Modelling of Cyclic Deformation of High-Temperature Materials

Descriptive Note:

Technical progress rept. 1 Feb-31 May 93,

Corporate Author:

FAIRFAX MATERIALS RESEARCH INC ALEXANDRIA VA

Personal Author(s):

Report Date:

1993-06-14

Pagination or Media Count:

34.0

Abstract:

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, where necessary, augmentation of the micro-scale research results currently available in the literature into a macro-scale model with predictive capability. In more detail, the program will develop a set of hierarchically structured models at different length scales, from atomic to macroscopic, at each level taking as parametric input the results of the model at the next smaller scale. In this way the known microscopic properties can be transported by systematic procedures to the unknown macro-scale region. It may not be possible to eliminate empiricism completely, because some of the quantities involved cannot yet be estimated to the required degree of precision. In this case the aim will be at least to eliminate functional empiricism.

Subject Categories:

  • Laminates and Composite Materials
  • Mechanics
  • Thermodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE