A study of the deformation of helical springs under eccentric loading
Leech, Andrew R.
MetadataShow full item record
Much analysis has been done to date on the deformation of helical springs due to normal loadings. The aim of this study is to design a helical spring that will deform under eccentric loading a desired amount due to a given force. Under the assumptions of linear stress strain relationships, the spring will be designed in terms of its material properties and its geometry. The deformation of the spring will be made possible utilizing a Shape Memory Alloy (SMA) active element that undergoes phase transformation upon heating above a certain temperature. Two models for spring deformation have been considered. In the first model we study the differential compression of a spring using SMA wire actuators, and in the second model we investigate the bending of an SMA rod placed inside the spring. Our efforts were a first step towards the development of a structural skeleton for a minimally invasive surgical manipulator
Approved for public release; distribution is unlimited
Showing items related by title, author, creator and subject.
The space-time scales of variability in oceanic thermal structure off the Central California coast Breaker, Laurence Coates (Monterey, California. Naval Postgraduate School, 1983-12);The space-time scales of variability in ocean thermal structure are examined off the Central California coast. In the active coastal upwelling regime off Pr. Sur, there was an equatorward surface jet 15 to 40 km offshore, ...
Griggs, Martin J. (Monterey, California: Naval Postgraduate School, 2016-12);The goal of this thesis was to build an experimental test rig for demonstrations on flexible space systems control. Specifically, an air-bearing test bed incorporated a two-degree of freedom (2DOF) rigid robotic arm and ...
Torsion in an incomplete tore: an approximate solution for the stress distribution in a circular ring sector under uniform torsion using energy methods. Callaway, William Franklin (Monterey, California. Naval Postgraduate School, 1952-05);The stress distribution in an incomplete tore loaded as shown in Fig. 1 is of particular interest since it very closely approximates that in heavy close-coiled helical springs under axial tension or compression. Necessarily ...