Th. Hyde et al., INTERPRETATION OF IMPRESSION CREEP DATA USING A REFERENCE STRESS APPROACH, International journal of mechanical sciences, 35(6), 1993, pp. 451-462
A sound, mechanics-based approach has been developed to allow conventi
onal creep data to be obtained from impression creep test data; the re
ference stress method was used, to analyse the results of axisymmetric
finite calculations, for this purpose. The equivalent uniaxial stress
was found to be 0.296 times the mean indenter pressure and the effect
ive gauge length was found to be about 0.755 times the indenter diamet
er. These values correspond closely with those which have been obtaine
d by fitting indenter creep data to conventional uniaxial creep data.