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

Clay Cutting Charts.
Appendix V: Clay Cutting Charts.
V.1 The Flow Type.
90
The Shear Angle β vs. The Blade Angle α
80
70
Shear Angle β (Degrees)
60
50
40
30
r=2.00
r=1.00
r=0.50
r=0.25
r=0.10
r=0.00
20
10
© S.A.M.
0
15 25 35 45 55 65 75 85 95 105 115 125 135 145 155 165 175
Blade Angle α (Degrees)
Figure V-1: The shear angle β as a function of the blade angle α and the ac ratio r.
The Blade Angle α + The Shear Angle β vs. The Blade Angle α
180
170
160
Blade Angle α + Shear Angle β (Degrees)
150
140
130
120
110
100
90
80
70
60
50
40
30
r=2.00
r=1.00
r=0.50
r=0.25
r=0.10
r=0.00
20
10
© S.A.M.
0
15 25 35 45 55 65 75 85 95 105 115 125 135 145 155 165 175
Blade Angle α (Degrees)
Figure V-2: The sum of the blade angle and the shear angle.
Shear angle and cutting forces for a layer thickness hi=0.1 m, a blade width w=1 m and a strain rate factor λc=1.
Copyright © Dr.ir. S.A. Miedema TOC Page V-129 of 228