Analysis of the Swage Autofrettage Process
Abstract
The autofrettage process is a well-known method to improve the working strength and fatigue life of thick-walled cylinders. In the conventional viewpoint, the cylinder is pressurized beyond its elastic limit in order to produce a beneficial residual stress pattern with large compressive hoop stresses at the bore. In practice, this has been accomplished by the swage process in which an oversized tungsten carbide mandrel is pressed through the bore to produce a similar effect. The analysis of this problem has not been possible until the development of high-level finite element codes and high- performance vectorized computers. This combination was utilized to accomplish a detailed analysis of the swage process in a short section of a 105-mm cannon tube.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1992
- Accession Number
- ADA251274
Entities
People
- G. P. O'hara
Organizations
- United States Army Armament Research, Development and Engineering Center