The use of helically coiled springs in creep experiments with special reference to the case of Bingham flow

Abstract

The use of springs in creep experiments is discussed, and a method is described such that by allowing a spring to creep under its self-weight a greater amount of strain-rate/stress data may be obtained from one test. Low-stress diffusion creep experiments on both spring and tensile specimens have indicated that creep is governed by a Bingham-type equation, and an analysis is presented which describes the effect of Bingham flow upon the creep of springs.