A Griggs deformation apparatus set up at Lille |
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| Authors: | J Ingrin JC Doukhan |
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| Institution: | Laboratoire de structure et Propriétés de l'Etat Solide, Universitéde Lille-Flandres-Artois, 59655 Villeneuve d'Ascq cedex, France |
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| Abstract: | The classical solid-medium apparatus (Griggs apparatus) is generally viewed as a machine of poor accuracy with a large amount of uncertainty. However, a new generation of equipment with new assemblies and experimental procedures has greatly enhanced the capability of the apparatus. Experiments performed on the apparatus set up in our Laboratory on T-oriented Yule Marble samples show that the yield strength of material can be measured with reasonable precision (within 10 MPa) and a yield strength as low as 50 MPa can be detected. The apparatus is particularly adapted to work on small specimens e.g. single crystals a few millimetres in size. |
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