Open AccessShock transmissibility of threaded joints
Author(s) -
Nick Hansen,
V.I. Bateman,
F.A. Brown
Publication year - 1996
Language(s) - English
Resource type - Reports
DOI - 10.2172/639812
Subject(s) - thread (computing) , structural engineering , joint (building) , shock (circulatory) , drilling , split hopkinson pressure bar , transmissibility (structural dynamics) , shock wave , engineering , mechanical engineering , materials science , acoustics , strain rate , physics , composite material , vibration , aerospace engineering , medicine , vibration isolation
Sandia National Laboratories (SNL) designs mechanical systems with threaded joints that must survive high shock environments. These mechanical systems include penetrators that must survive soil and rock penetration; drilling pipe strings that must survive rock-cutting, shock environments; and laydown weapons that must survive delivery impact shock. This paper summarizes an analytical study and an experimental evaluation of compressive, one-dimensional, shock transmission through a threaded joint in a split Hopkinson bar configuration. Thread geometries were scaled to simulate large diameter threaded joints with loadings parallel to the axis of the threads. Both strain and acceleration were evaluated with experimental measurements and analysis. Analytical results confirm the experimental conclusions that in this split Hopkinson bar configuration, the change in the one-dimensional shock wave by the threaded joint is localized to a length equal to a few diameters` length beyond the threaded joint