Experimental Study of Trafficability of Agricultural Vehicles (III)

High Speed Shear Test by Model Track Shoe

Abstract

The high speed shear tests using the model track shoe were tried to know the influence of the shear test speeds on shear stress-displacement curves and on shearing strength in three soils. The results obtained in these tests may be described as follows.
Track shoe sinks during tests under various vertical loads. This phenomena seems to relate to the horizontal displacement of track shoe. In general, the shear stress-horizontal displacement curves move to the left with the increase of shear test speeds and the horizontal-vertical displacement displacement curves are independent of shear test speeds. It is important result that the shearing strength is independent of shear test speeds in cohesionless soils, but it is expressed by linear function of logarithm of shear test speeds in cohesive soil.