A Small Strain Tension-Torsion Extensometer

Publisher Website
Google Scholar
Abstract
The design and error analysis of a high accuracy, high sensitivity, low interaction tension‐torsion extensometer for use on thin wall tubes is presented. Direct current differential transformers are used as position transducers and the extensometer outputs are independent of any symmetric specimen bending that may occur, although it is possible to combine the outputs to measure bending in two perpendicular directions through the specimen axis in order to check specimen alignment. Usable accuracies are of the order of 10−4% for both modes, the interaction of the two modes is less than 0.2%, and over‐all linearity is better than 0.5%, all percentages being relative to full scale. The total strain range is 5% in tension and 1.25% in torsion.

This publication has 1 reference indexed in Scilit: