Abstract
Development of boundary friction forces is a common problem in testing of materials, such as rock and concrete. This article reports on experimentations with different friction reducing pads, aiming at diminishing the side friction effects in polyaxial tests. This appears technically possible by using special Teflon®-grease pads, with optimum lubrication achieved at high pressures. Ineffective lubrication can cause an apparent increase of strength and Young's modulus. The volumetric changes under polyaxial stress states appear relatively little affected by boundary friction, contrary to the partial volume changes of ΔV2 and ΔV3.
Issue Section:
Technical Notes
References
1.
Ko
, H. Y.
and Scott
, R. F. A.
, “New Soil Testing Apparatus
,” Geotechnique
0016-8505, Vol. 17
, No. 1
, 1967
, pp. 40
-57
.2.
Pearce
, J. A.
, “A New Truly Triaxial Apparatus
,” Stress-Strain Behaviour of Soils, Proceedings of the Roscoe Memorial Symposium
, Foulis, London
, 1971
, pp. 330
-339
.3.
Atkinson
, R. H.
and Ko
, H.-Y.
, “A Fluid Cushion, Multiaxial Cell for Testing Cubical Rock Specimens
,” International Journal of Rock Mechanics and Mining Science, and Geomechanical Abstracts
, Vol. 10
, 1973
, pp. 351
-361
.4.
Lade
, P. V.
, “Cubical Triaxial Apparatus for Soil Testing
,” Geotechnical Testing Journal
0149-6115, Vol. 1
, No. 2
, 03
1978
, pp. 93
-101
.5.
Nojiri
, Y.
, Kotani
, K.
, and Abe
, Y.
, “Failure Envelope of Concrete Subjected to Multiaxial Compressive Stresse
,” Colloque international (Réponse du Béton aux solikitations multiaxiales)
, 05
1982
, Toulouse, France, pp. 141
-148
.6.
Michelis
, P.
and Demiris
, C.
, “Conception et construction d'une vraie cellule triaxiale
,” Comptes rendus
, Vol. 229
, Serie II, C.R. Acad. Sc., Paris, 1984
, pp. 375
-378
.7.
Michelis
, P.
, “A True Triaxial Cell for Low and High Pressure Experiments
,” International Journal of Mechanical Mining Science and Geomechanical Abstracts
, Vol. 22
, 1985
, pp. 183
-188
.8.
Bakassis
, I.
, Repartition des deformations plastiques residuelles en hautour dans les eprouvettes prismatique de marbre de Thassos subi en compression multiaxiale
, D.E.A. I.N.S.A.
, Toulouse, France
, 1985
.9.
Demiris
, C.
, “Surface de rupture et de limite de dilatance du marbre de Thassos soumis à des efforts de compression multiaxiaux
,” Comptes rendus
, Vol. 301
, Serie II, C.R. Acad. Sc.
, Paris
, 1985
, pp. 1225
-1230
.
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