4.7: Nomenclature
- Page ID
- 33421
a, \(\ \tau_\mathrm{a}\) |
Adhesion or external shear strength |
kPa |
A |
Adhesive force on the blade |
kN |
c, \(\ \tau_\mathrm{c}\) |
Cohesion or internal shear strength |
kPa |
cm |
Mobilized cohesion in case of Tear Type or Chip Type |
m |
C |
Force due to cohesion in the shear plane |
kN |
Fh |
Horizontal cutting force |
kN |
Fv |
Vertical cutting force |
kN |
g |
Gravitational constant (9.81) |
m/s2 |
G |
Gravitational force on the layer cut |
kN |
hi |
Initial thickness of layer cut |
m |
hb |
Height of blade |
m |
hb,m |
Mobilized height of the blade in case Curling Type |
m |
I |
Inertial force on the shear plane |
kN |
K1 |
Grain force on the shear plane |
kN |
K2 |
Grain force on the blade |
kN |
N1 |
Normal force on the shear plane |
kN |
N2 |
Normal force on the blade |
kN |
R1 |
Acting point forces on the shear plane |
m |
R2 |
Acting point forces on the blade |
m |
R3 |
Acting point gravity force |
m |
S1 |
Shear force due to friction on the shear plane |
kN |
S2 |
Shear force due to friction on the blade or the front of the wedge |
kN |
vc |
Cutting velocity |
m/s |
w |
Width of blade |
m |
W1 |
Force resulting from pore under pressure on the shear plane |
kN |
W2 |
Force resulting from pore under pressure on the blade/ front wedge |
kN |
z |
Water depth |
m |
\(\ \alpha\) |
Cutting angle blade |
rad |
β |
Shear angle |
rad |
φ |
Angle of internal friction |
rad |
δ |
External friction angle |
rad |
ρs |
Density of the soil |
ton/m3 |
ρl |
Density water |
ton/m3 |