ISSN: 1945-7553
CODEN: JTEVAB
Page Count: 5

A Constant Stress Tensile Creep Machine for Very Low Stresses

Yavari, P
Research associate and professor, University of Southern California, Los Angeles, CA

Langdon, TG
Research associate and professor, University of Southern California, Los Angeles, CA

Abstract

A simple constant stress tensile creep machine is described for use at very low stress levels. The initial mechanical advantage of the machine is 3:8 and the minimum feasible load is about 1.8 N. Some typical creep results are presented for an aluminum-5% magnesium alloy with measured steady-state strain rates down to about 10⁻⁹ s⁻¹. It is demonstrated that the results obtained from this machine coincide with data from a normal creep machine at high stress levels, but the stress marking the experimental lower limit is reduced by more than one order of magnitude.

Keywords:
creep (properties), stresses, tension tests, constant stresses, mechanical advantage

Paper ID: JTE11576J
DOI: 10.1520/JTE11576J
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