花生籽粒力学特性的研究

Study on the squeeze breaking mechanism of peanut seeds

选择花生籽粒最大挤压破碎力为指标,以施压方向、含水率为因素,对其进行全因子试验,并分析花生籽粒在不同含水率、不同施压方向下的力学性质。结果表明:施压方向、含水率对花生最大挤压破碎力均有极显著影响;花生籽粒在受力面不同时所承受的最大挤压破碎力有较大的差异,在同一含水率的条件下,腹面承受的破碎力最大,侧面次之,顶面最小;在同一挤压面下,当含水率大于6.6%时,最大挤压破碎力随含水率的增加呈现逐渐减小的趋势,其原因与花生籽粒内部结构有关。

Chosing the maximum squeeze breaking force of peanut seeds as index, squeeze direction and moisture con- tent as factors, the orthogonal experiment was done and the mechanical properties of peanut seeds were analyzed under different squeeze position and different moisture content. The experimental results showed that： effect of the squeeze di rection and moisture content on maximum squeeze breaking force; when the squeeze surface changed, the maximum squeeze breaking force of peanut seeds varied apparently; on the same moisture content conditions, the bearing squeeze force on the ventral was the maximum, the bearing squeeze force on the top was the minimum; at the same squeeze sur- face, when the water content was greater than 6.6%, maximum squeeze breaking force gradually decreased with the in- crease of moisture content, which may result from internal structure of peanut seeds.