Theory for Shear Strength of Granular Materials

by Sekanoor K. Sadasivan, Asst. Prof. in Civ. Engrg.; Regional Engrg. College, Srinagar, Kashmir, India,
Vegesna S. Raju, Asst. Prof. in Civ. Engrg.; Indian Inst. of Tech. Madras, India,

Serial Information: Journal of the Geotechnical Engineering Division, 1977, Vol. 103, Issue 8, Pg. 851-861

Document Type: Journal Paper


Based on statistical methods, a theory has been proposed for the shear strength of a random assembly of spherical cohesionless particles. The theoretical analysis gives a relationship between angle of internal friction φcv at constant volume, interparticle friction angle φμ, and void ratio e. For comparison, drained triaxial compression tests have been carried out on steel spheres, uniform sands, and glass ballotini of different sizes. When φμ is calculated from the experimentally obtained φcv values it has been found that φμ is independent of void ratio, which is an indirect evidence to support the validity of the proposed theory. Comparison with experimental results on sands suggests that the use of the proposed theory could also be extended to random assemblies of irregular shaped particles as well.

Subject Headings: Shear strength | Granular materials | Particles | Friction | Void ratio | Comparative studies | Triaxial tests | Soil compression

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