Table 2 Basic parameters of the discrete element simulation model.

From: Study on digging form of mechanized harvesting of Cyperus esculentus and optimization test of device parameters

Physical property

Attribute

Numerical value

Physical parameters of the upper soil

Poisson’s ratio

0.41

Solids density/(kg m3)

1320

Shear modulus/Pa

1.1e+6

Physical parameters of the middle soil

Poisson’s ratio

0.440

Solids density/(kg m3)

1710

Shear modulus/Pa

5.4e+6

Physical parameters of the subsoil

Poisson’s ratio

0.48

Solids density/(kg m3)

1860

Shear modulus/Pa

7.3e+6

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