含水率对大豆静压机械特性的影响

Effect of moisture content on mechanical properties of soybean seed under static pressure

为探明不同含水率的大豆物理机械性质、揭示脱粒与输送过程中大豆机械损伤机理,以沈农12大豆为试验对象,应用万能生物材料试验机进行了5种含水率下的大豆破裂强度、弹性模量和压缩功等准静压力学特性试验,获得了6.84%～21.37%含水率范围内、3个方向的大豆破裂强度、弹性模量和压缩功及其变化规律,研究结果可为改进大豆脱粒和输送装置、确定工艺参数提供参考。

In order to explore major mechanical properties soybean seed under different moisture content and disclose the damage mechanism of soybean seed during threshing and transportting, Shennong-12 soybean was seleted as test materials, major mechanical properties such as different forms of damage, elastic modulus, rupture strength and compression work for test index, the static compression test were carried out by means of universal bio-material tester with five levels of moisture content ranging from 6.84% to 21.37% and three kinds of stress direction. The relationship between moisture content and elastic modulus, moisture content and rupture strength, moisture content and compression work were researched. The results have important significance to well improvement structure and technology parameters of thresher and transporter of soybean seeds.