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利用直剪仪测定了在不同法向压应力(25,50,75,100 kPa)条件下大豆(含水率分别为10.62%、12.32%、13.84%、15.23%、17.02%)与不同仓壁材料(不锈钢板、混凝土板、木板)的摩擦系数。结果表明:大豆与不锈钢板的摩擦系数最小,与木板的摩擦系数较大,与混凝土板的摩擦系数最大,摩擦系数范围分别是0.317~0.420,0.323~0.453,0.357~0.533;在含水率一定的条件下大豆与仓壁材料的摩擦系数随着法向压应力的增大而减小,法向压应力一定的条件下大豆与仓壁材料的摩擦系数随着含水率的增大而增大。最后,分别拟合了摩擦系数与法向压应力和大豆含水率的一元二次关系方程。
The effects of different normal compressive stress (25, 50, 75, 100 kPa) on the shear strength of soybean (moisture content 10.62%, 12.32%, 13.84%, 15.23%, 17.02% Board, concrete panels, wood) friction coefficient. The results showed that the friction coefficient between soybean and stainless steel was the smallest, the friction coefficient between wood and soybean was the highest, and the friction coefficient between the soybean and stainless steel was the highest. The friction coefficient range was 0.317 ~ 0.420,0.323 ~ 0.453,0.357 ~ 0.533. The friction coefficient of soybean and silo wall material decreases with the increase of normal compressive stress, and the friction coefficient of soybean and silo wall material increases with the increase of moisture content under certain compressive stress. Finally, the univariate quadratic equations of friction coefficient, normal compressive stress and soybean moisture content were fitted respectively.