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谷壳破碎中的微力学特性是谷物收获后加工处理设备的工程设计所首要关注的。然而,微力学特征的测算需要新的实验方法。为了研究谷壳破碎中的微力学特征,本文采用了一种结合单拉力和三点弯曲的实验方案。被抽样的谷物样本温度为27℃,并在15％的潮湿环境下,以每分钟1毫米速度的拉伸。实验结果载荷曲线表明谷壳是很容易破碎的,而且经度拉力方式甚于横度拉力方式。一般来说,经度和横度细胞的疏密造成的谷壳物质破碎对这些特性有一定的影响。谷壳的外形,表面轮廊,硅含量的增加都充分说明了谷壳结构的变化。它们之间最弱的联系是细胞层之间互锁成“S”型搭接。接点处基于稀有元素分析得出的拉力集合变化范围是5～9,而现有记录的结构变化指标估计是5～7。
The micromechanical nature of chaff crushing is of primary concern in engineering design of post-harvest processing equipment for grain harvesting. However, the calculation of micromechanical features requires new experimental methods. In order to study the micromechanics character of chaff crushing, an experimental scheme combining single pull and three-point bending was adopted in this paper. The sampled grain sample temperature was 27 ° C and stretched at 1 mm per minute in a 15% damp environment. The experimental results show that the load curve shows that the chaff is easily broken, and the longitude pull method is more than the transverse pull method. In general, fragmentation of the chaff caused by the density of longitude and cross-hatching cells has some effect on these characteristics. The shape of the chaff, the surface of the wheel gallery, the increase of silicon content have fully demonstrated the chaff structure changes. The weakest link between them is the interlocking of cell layers into “S” laps. The range of variation of pull set based on rare element analysis at the contact point is 5 ~ 9, while the structural change index of existing records is estimated at 5 ~ 7.