Resumen
Analyzing the results of triaxial compression tests under drained conditions for Erksak sand published in the literature, the stress?dilatancy relationships were described using the frictional state concept. At all phases of shearing, the linear stress ratio?plastic dilatancy relationship can be expressed by the critical frictional state angle and two parameters of the frictional state concept. At failure, dense sand exhibits purely frictional behavior (a = 0, ß = 1) and the stress ratio?dilatancy relationship may be correctly described by the Rowe, Bolton, and frictional state concept relationships. Very loose Erksak sand sheared under drained triaxial compression at the ultimate state reaches a stable condition, but the reached stress ratio is significantly smaller than the one at a critical state.