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

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

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Appendix E: <strong>The</strong> Coefficient c1.<br />

<strong>The</strong> Coefficient c1.<br />

Table E-1: c1 for hb/hi=1.<br />

hb/hi=1 32 º 37 º 42 º 47 º 52 º<br />

<br />

<br />

15 º 0.104 0.118 0.132 0.146 0.162<br />

18 º 0.119 0.134 0.150 0.167 0.186<br />

15 º<br />

21 º 0.133 0.150 0.169 0.189 0.210<br />

24 º 0.147 0.167 0.188 0.211 0.236<br />

27 º 0.162 0.184 0.209 0.235 0.264<br />

30 º 0.177 0.202 0.229 0.259 0.292<br />

15 º 0.175 0.203 0.234 0.268 0.306<br />

18 º 0.195 0.227 0.261 0.300 0.343<br />

30 º<br />

21 º 0.215 0.251 0.290 0.334 0.384<br />

24 º 0.236 0.276 0.320 0.370 0.427<br />

27 º 0.257 0.302 0.352 0.409 0.474<br />

30 º 0.279 0.329 0.385 0.450 0.525<br />

15 º 0.254 0.304 0.360 0.425 0.502<br />

18 º 0.279 0.334 0.398 0.472 0.560<br />

45 º<br />

21 º 0.305 0.367 0.438 0.523 0.624<br />

24 º 0.332 0.401 0.482 0.578 0.695<br />

27 º 0.360 0.437 0.529 0.639 0.774<br />

30 º 0.390 0.477 0.580 0.706 0.863<br />

15 º 0.360 0.445 0.547 0.671 0.826<br />

18 º 0.393 0.488 0.604 0.746 0.928<br />

60 º<br />

21 º 0.428 0.535 0.666 0.831 1.045<br />

24 º 0.466 0.587 0.736 0.928 1.180<br />

27 º 0.507 0.643 0.815 1.039 1.341<br />

30 º 0.553 0.707 0.905 1.169 1.534<br />

<strong>The</strong> dimensionless force c1in the direction of the cutting velocity, as a function of the blade angle , the angle of<br />

internal friction , the soil/interface friction angle , for hb/hi=1<br />

Copyright © Dr.ir. S.A. Miedema TOC Page E-25 of 228

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