不規則形状粒子の破砕における寸法効果とエネルギー法則
1970 年 86 巻 992 号 p. 847-852
詳細
1970 年 86 巻 992 号 p. 847-852
An experimental study of the size effects and the energy laws of single particle crushing under slow rate of loading in a coarse size range was carried out by using irregular shaped specimen made of borosilica glass and 4 kinds of minerals.
The mass of particle ranged from about 0.01 to 2 gram for borosilica glass and from about 0.1 to 70 gram for 4 kinds of minerals and rate of loading was 0.3t/min.
A summary of experimental results was as follows I) as illustrated by equation (9) the strength of irregular shaped particle is proportional to its breaking load and inversely proportional to the square of the distance of loading points, II) the Weibull's coefficient of uniformity obtained for irregular shaped particle was approximately equal to that obtained for spherical particle, III) the energy law of equation (4) concerning the single sphere crushing can approximately be applied to the estimation of the energy requaired for fracture of irregular shaped particle.
