RESIDUAL STRESSES IN THICK-WALLED CYLINDERS RESULTING FROM MECHANCIALLY INDUCED OVERSTRAIN,
Abstract
Autofrettage is a process for inducing elastic response in thick-walled cylinders subjected tointernal pressures which otherwise cause plastic strains. To extend the use of autofrettage to higher pressure applications and to eliminate many of the problems encountered in the use of the conventional process based on the use of direct internal hydrostatic pressure, a new technique has been developed which utilizes the mechanical advantage of a silding wedge to produce the desired bore enlargement. Since the use of a sliding wedge or mandrel will induce shearing forces at the mandrel-cylinder interface, the resultant residual stress distribution will differ from that theoretically predicted as characteristic of the direct hydrostatic process. It is the purpose of this work to determine the residual stress distribution as a function of magnitude of overstrain and diameter ratio, and how it affects the reyielding characteristics of cylinders autofrettaged by this technique. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1963
- Accession Number
- AD0421194
Entities
People
- A. N. Reiner
- D. P. Kendall
- T. E. Davidson