Study on mechanical behaviour and parameter optimisation of straw returning mechanism based on tracer method

ABSTRACT

Two kinds of deformations occurred in the interaction between rice and wheat straw and cutter during the actual operation: bending deformation of extruded straw and shear deformation of sheared straw. The indoor and outdoor bending and shear tests were set according to the two types of deformation. The indoor experimental results showed that rice and wheat straw had a decreasing bending strength as the loading rate increases. The shear strength of wheat straw increased first and then decreased with the growing loading rate; while the shear strength of rice straw increased with the increasing loading rate. The outdoor experimental results showed that: rice straw had a displacement greater than that of wheat straw, the marker pip displacement of rice straw was more uniform than that of wheat straw.

KEYWORDS:

• Straw returning mechanism
• tracer method
• straw returning to field
• mechanical behaviour
• parameter optimisation

Disclosure statement

No potential conflict of interest was reported by the authors.