Instrumental modifications for compressive testing under hydrostatic confining conditions
- 1 January 1985
- journal article
- Published by EDP Sciences in Revue de Physique Appliquée
- Vol. 20 (11) , 805-811
- https://doi.org/10.1051/rphysap:019850020011080500
Abstract
The device originally designed by D. T. Griggs [1] in order to deform minerals in compression under a confining pressure has been modified and adapted to the study of the plasticity of metal alloys and semi-conductors. The changes take advantage of a commercial testing machine, they also ensure an improved rigidity of the machine. In addition, friction has been reduced to such a level that the minimum flow stress which is now detectable has dropped by one order of magnitude. In complement, a servocontrolled microleak permits an adjustable low depressurization of the confining medium and eliminates the destruction of the samples by fracture which occurs usually at the end of a standard testKeywords
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