粮食专用直剪仪的研制

Development of a special direct shear apparatus for grain

直剪仪是测定散粒体内摩擦角应用最为普遍的一种装置，然而适用于粮食散粒体的直剪仪则没有。在对部分大型直剪仪现状研究分析的基础上．研制了用于测定粮食内摩擦角用直剪仪，阐述了该直剪仪的设计原理和结构构造。实验表明，该仪器具有较好的稳定性、准确性、操作简易等特点，可以用于粮食内摩擦角的测试。

Direct shear apparatus（DSA）has been widely used in testing internal friction angle of granular, but not used for grain granular. This paper analyzes some large DSAs at present. Then, a special DSA which is used for grain internal friction angle measure is developed in detail from its design principle to configuration. By direct shear test, this DSA has a characteristic of stability, accuracy, simplicity and so on. It can be applied to test grain material internal friction angle.