Improved Design for Dynamically-Loaded, Threaded Interfaces

摘要

An improved thread design for dynamically-loaded, threaded interfaces is presented. Maximum stress is generally located in the thread relief region or the root of the first thread of a threaded interface under load. Consequently, a non-uniform stress distribution exists throughout the thread. The improved thread design presented in this paper provides for an alternate load path resulting in a uniform stress distribution and elimination of the thread root and relief stress concentration. Whitworth and ACME type threads have been examined using hydrodynamic finite-element analysis techniques. Correlation with experimental results is good. The new thread design has been successfully implemented in the high explosive velocity augmented kinetic energy penetrator. (ERA citation 07:061880)