The Furrow Length ascending on the flat plate—model of Plow body— and its sliding by shearing.

Abstract

1. One of the foundamental difference between European plow and Japanese plow exists in Continuity of Furrow Slice. The Furrow made by the former is continuous though that made by the latter is not continuous but is separated in some definite length.
2. This is a theoretical and experimental research about Furrow sliding upon the surface of plow body. For experiment writer used flat steel plate as the model of plow body.
3. Furrow will slide by shearing at the lower end when it ascend on the plate by some length.
The sliding angle (β) of Furrow is calculated by next equation,
β=π/4-α/2-γ/2
where, α is the inclination angle of steel plate and γ is angle of internal friction of the soil.
4. The ascending length (x) of Furrow at shearing time, is increasing function of α usually. But in experiment which is performed on special condition, there is minimum value of x at some definite value of α.
5. The value of x increase with the depth (h) of Furrow, angle of internal friction (γ) and cohesion. (c), but will decrease with friction angle (θ) and adhesion (e) between Furrow and steel plate.
6. By adding weight on the Furrow sliding upon the plate, the value of x decrease, but it increase by putting weight on the front ground near the plate.