TEST AND ANALYSIS OF MECHANICAL PROPERTIES OF BUCKWHEAT STEM DURING HARVEST

Buckwheat crops are subjected to complex stress during harvest. And there problems such as large deformation, severe brokenness, and high energy consumption of stems the mechanical harvesting, cutting, transporting, threshing, separating cleaning. In this study, properties buckwheat stem harvesting were tested, including tensile, bending, shearing dynamic effects moisture content, position working parameter on their analyzed. The test results showed that tensile strength, elastic modulus, cutting unit area with higher content significantly greater than those lower (P<0.05). flexural modulus bending strength (P < 0.05). shear decreased gradually height increasing. parameters had significant (P<0.05), first then changed steadily average speed blade oblique angle increasing, but increased. recommended be 0.75-1.0 m/s 30o, respectively. This research can provide basic data for design machinery