Andrade Pais L. J., Carvalho P. E. M., Ferreira Gomes L. M.
Mechanical Behaviour, Triaxial Tests, Stress Levels
The paper reports laboratory investigation to evaluete the gross yield and idealised zones on stress space of a bonding soil through an empirical process. For this triaxial tests on bonded samples of granitic residual soil of Covilhã were carried out. After saturation, the samples were isotropically consolidated to the requested effective stress (35 to 400 kPa), and were then sheared in triaxial compression under undrained conditions. The deformations were measured using techniques normalised with the use of an external transducer. The initial stiffness cannot give true results due to bedding errors and final effects. They can be used as comparisons among the different tests and to study the type of the stress - strain curves and stress path for different stress levels, allowing formulating zones or domains of mechanical behaviour in the stress space p´- q. The gross yield behaviour in structured samples was observed, studying the changes in stiffness. The results seem to demonstrate the possibility of defining three zones by the distribution of the defined yield points in the stress – strain curves and stress paths on p´- q space.
Cite this paper
Andrade Pais L. J., Carvalho P. E. M., Ferreira Gomes L. M.. (2016) Mechanical Behaviour - Idealised Zones on Stress Space. International Journal of Theoretical and Applied Mechanics, 1, 320-325