Abstract
SYNOPSIS In this paper the effect of surface texture on the shear characteristics of granular materials is studied from the results of drained triaxial compression tests. The materials tested are uniform spheres of steel having different surface roughnesses. Test results indicate that for the granular materials the development of failure zone in the triaxial specimen is affected by surface roughness in the same manner as in Mogami’s test results on one-layer assembly of uniform spheres, and that shearing strength and dilatancy increase correspondingly with an increase in surface roughness. The expression for the physical components of shear strength in granular materials is proposed, and the relationship between surface roughness and “k value” in Mogami’s theory of mechanics of granular materials is also described concerning the test results.
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