The Delft Sand, Clay & Rock Cutting Model, 2019a

The Delft Sand, Clay & Rock Cutting Model.
A: Brittle Shear Horizontal Force Coefficient λ HF vs. Blade Angle α
10
Brittle Shear Horizontal Force Coefficient λ HF (-)
9
8
7
6
5
4
3
2
1
φ=00°
φ=05°
φ=10°
φ=15°
φ=20°
φ=25°
φ=30°
φ=35°
φ=40°
φ=45°
© S.A.M.
0
15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100
Blade Angle α (Degrees)
Figure 8-31: The brittle (shear failure) horizontal force coefficient λHF.
A: Brittle Shear Vertical Force Coefficient λ VF vs. Blade Angle α
2
Brittle Shear Vertical Force Coefficient λ VF (-)
1
0
-1
-2
-3
-4
-5
-6
-7
-8
-9
φ=00°
φ=05°
φ=10°
φ=15°
φ=20°
φ=25°
φ=30°
φ=35°
φ=40°
φ=45°
-10
15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100
Blade Angle α (Degrees)
© S.A.M.
Figure 8-32: The brittle (shear failure) vertical force coefficient λVF.
If the forces become to high another mechanism will occur, for example the wedge mechanism.
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