Abstract: From the viewpoints of stress history and stress path, a method of describing the stress-strain-volume change behaviour of sand is established using a large quantity of drained triaxial tests of saturated sand. A modified form of hyperbolic relationship is used to describe the stress-strain behaviour of sand subjected to both coat pression and extension stress paths with different consolidation history. The change of hyperbolic parameters with consolidation history and stress path is discussed. It is shown that the observed volume change in tests can be predicted accurately with the proposed relationship between lateral and axial strain.