The Influence of Cyclic Loading on Residual Stress Relaxation.
Abstract
The study was experimental determination of the existence of residual stress relaxation in 7075 T651 aluminum under constant amplitude cyclic loading. A unique three bar coupon was designed so that the two outer members remain totally elastic while the middle member is allowed to plastically deform. Stress determination of the plastic member is possible using only data from the other two members. An MTS machine was used to load the coupon so that a residual stress existed on the middle member while the other members remained totally elastic. A cyclic load of constant amplitude was then applied to the coupon. It was found that the stresses in the totally elastic members did not change at all during the cyclic loading. Thus relaxation of the residual stress in the middle member did not occur, as various fatigue theories have assumed it would.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1975
- Accession Number
- ADA019496
Entities
People
- Michael L. Burski
Organizations
- Air Force Institute of Technology