Hideaki Kishida

TL;DR: In this article, the significance of possible influential factors with the use of the experimental design method was examined with the help of laboratory experiments, including surface roughness of steel, 50 percent diameter of sand, sand type, test type (simple shear and shear box), and uniformity coefficient of sand.

TL;DR: In this paper, a series of laboratory tests are carried out on the friction between steel and air-dried sands with a simple shear apparatus, and the significance of factors on the frictional coefficient are examined with the use of the experimental design method by orthogonal array table.

TL;DR: In this article, a method for observing the particle behavior near the interface in sand-steel friction tests was described, where a friction testing apparatus was modified to allow the observation of sand particles.

TL;DR: In this article, the authors report a series of laboratory tests on sand-concrete friction under two-way repeated loading with a simple shear type apparatus, and they show that the residual coefficient of friction under repeated loading coincides with that under monotonic loading.

TL;DR: In this article, a shear zone formation along the sand-steel interface was observed with macroscopic photographing, which explains the decrease of upper-limiting value of the coefficient of friction.