Load Time Dependent Relaxation of Residual Stresses in an Aluminum Test Specimen
Abstract
The analysis presented in this report is concerned with the effect of residual stresses on the life-lengthening of structural members. In particular, it has been observed that in specimens subjected to compressive residual stresses, which occur as a result of plastic deformation at a stress concentration, the life of the specimen is extended. However, in some later tests involving both load and time effects, the residual compressive stresses have been shown to shorten the specimen lifetime. This apparent contradiction is no doubt due to the complex phenomenological behavior of the material which is not very well understood at the present time. To better understand the material behavior as discussed briefly above (and referred to as load-time dependent relaxation of residual stresses) an analytical approach has been developed to complement the existing experimental approaches. The techniques involved and the results of this analysis are presented in Section II. The conclusions and recommendations are presented in Section III. The supporting documentation for this analysis is included in the Appendices.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1977
- Accession Number
- ADA363139
Entities
People
- Rocky R. Arnold