Stress-Controlled Apparatus for Triaxial Testing

by Adel S. Saada,

Serial Information: Journal of the Soil Mechanics and Foundations Division, 1967, Vol. 93, Issue 6, Pg. 61-78

Document Type: Journal Paper


A testing machine in which the rate of true stress can be controlled manually or automatically is described. A pneumatic analog computer continuously calculates the cross section of the test specimen and provides the loading unit with a pressure such that the force applied produces a given axial stress. The whole test, up to fracture, is entirely automated. A wide range of stress paths is made possible by this machine. Tests on a saturated kaolinite serve to illustrate some of the capabilities as well as to point out some of the problems that this machine may help investigate.

Subject Headings: Triaxial loads | Triaxial tests | Axial forces | Equipment and machinery | Automation | Load tests | Pneumatic systems | Analogs

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