ISSN: 1945-7553
CODEN: JTEVAB
Page Count: 4

A Novel Specimen Geometry for Double Shear Creep Experiments

Kim, H-K
Materials Section, University of California, Irvine, CA

Mohamed, FA
Materials Section, University of California, Irvine, CA

Earthman, JC
Materials Section, University of California, Irvine, CA

(Received 7 February 1990; accepted 5 September 1990)

Abstract

A new specimen geometry has been developed to reduce the stress concentrations at the ends of the gage section in double shear creep specimens. The purpose of the geometry is to reduce the tendency for crack formation at the gage section ends when testing creep brittle materials. A comparison of creep data indicates that the sharp corners at the ends of the gage sections of the conventional geometry has a negligible effect on the steady-state creep behavior. The results also suggest that, when a nonuniform gage section is used, the stresses redistribute during primary creep such that steady-state flow is driven by the mean shear stress over the entire gage section.

Keywords:
creep deformation, shear stress state, shear strain, double shear experiment, simple shear, stress redistribution, high temperature deformation

Paper ID: JTE12540J
DOI: 10.1520/JTE12540J
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