粒状体におけるポテンシャル障壁, 潜在すべり面の概念の実験による考察

抄録

In the previous paper¹⁾, the author applied the Markov process to the deformation process of particulate materials and established a mechanical model of particulate materials. In the model the concepts of the potential barriers and the potential slip plane were introduced. These concepts represent the mechanical properties of particulate materials under deformation process at the particle scale.
In this paper, the experimental consideration is described in order to examine the validity of the concepts of the potential barriers and the potential slip plane. The sandy soils were poured into a water tank and deposited in a soil tank which was set at different sediment angles, θ=0°, 30°, 60°and 90°. Then, the specimens with different fabrics were prepared by sampling from the soil tank. The drained triaxial compression tests were performed under a constant confining pressure by using the saturated specimens with different initial fabrics.
The followings were made clear from the experimental results: the specimen with the sediment angle θ=0°showed the greatest resistance to the deformation, the greatest strength and the most violent dilatancy; the specimen with the sediment angle θ=60°showed the smallest resistance to the deformation, the smallest strength and the smallest dilatancy. These mechanical characteristics due to the different initial fabrics were qualitatively explainable by using the concepts of the potential barriers and the potential slip plane. This fact proves the validity of these concepts which were introduced in the mechanical model of particulate materials proposed by the author.