ANALYTICAL APPROACH TO COMPOSITE BEHAVIOR.
Abstract
The residual stresses, which result from dissimilar thermal expansions of the components of composites, were determined experimentally on cylindrical model composites of two different systems: (1) OFHC Copper core with a 4340 steel case. (2) OFHC Copper core with an 18% Ni maraging steel case. These stresses were determined by the Sachs Boring-Out method, in which axial and tangential surface strains were measured during the boring process. These residual stresses have been considered in the analytical predictions of stress-strain behavior of the composites. The effect of pre-straining on the residual stress states and on subsequent stress-strain behavior of the cylindrical model composites, as well as on tungsten fiber - copper matrix fiber composites, was investigated. The high residual stresses, which were found to be present as a result of thermal processing, were sufficiently altered by pre-straining to cause a substantial increase in the stress-strain curve on reloading. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1968
- Accession Number
- AD0837237
Entities
People
- C. H. Hamilton
- L. J. Ebert
- S. S. Hecker
Organizations
- Case Western Reserve University