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# 17.9: Appendix I- The Coefficient d1

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 hb/hi=1 φ 32o 37o 42o 47o 52o α δ 15o 15o 1.390 1.505 1.625 1.753 1.890 18o 1.626 1.766 1.913 2.069 2.238 21o 1.860 2.028 2.205 2.393 2.597 24o 2.092 2.291 2.501 2.726 2.970 27o 2.324 2.557 2.803 3.068 3.358 30o 2.556 2.826 3.112 3.423 3.764 30o 15o 1.206 1.374 1.559 1.766 2.000 18o 1.381 1.575 1.791 2.033 2.309 21o 1.559 1.783 2.033 2.315 2.638 24o 1.741 1.998 2.286 2.613 2.991 27o 1.928 2.222 2.552 2.930 3.370 30o 2.121 2.455 2.833 3.269 3.781 45o 15o 1.419 1.688 2.000 2.365 2.800 18o 1.598 1.905 2.262 2.685 3.192 21o 1.784 2.133 2.543 3.032 3.625 24o 1.980 2.376 2.846 3.411 4.105 27o 2.186 2.636 3.174 3.829 4.642 30o 2.404 2.916 3.533 4.292 5.249 60o 15o 1.879 2.331 2.883 3.570 4.444 18o 2.099 2.615 3.252 4.054 5.090 21o 2.336 2.925 3.661 4.602 5.837 24o 2.593 3.267 4.120 5.228 6.711 27o 2.872 3.645 4.639 5.952 7.746 30o 3.179 4.069 5.232 6.798 8.991

The dimensionless force d1, in the direction of the cutting velocity, as a function of the blade angle α, the angle of internal friction φ, the soil/interface friction angle δ, for hb/hi=1.

 hb/hi=2 φ 32o 37o 42o 47o 52o α δ 15o 15o 2.295 2.460 2.627 2.801 2.984 18o 2.683 2.889 3.098 3.315 3.545 21o 3.062 3.313 3.569 3.836 4.119 24o 3.435 3.735 4.042 4.364 4.707 27o 3.803 4.156 4.520 4.903 5.313 30o 4.169 4.579 5.005 5.455 5.941 30o 15o 1.729 1.934 2.156 2.401 2.674 18o 1.997 2.239 2.503 2.794 3.122 21o 2.267 2.550 2.860 3.205 3.593 24o 2.539 2.868 3.230 3.634 4.093 27o 2.815 3.195 3.614 4.085 4.625 30o 3.097 3.532 4.015 4.563 5.195 45o 15o 1.836 2.142 2.492 2.898 3.377 18o 2.093 2.447 2.854 3.330 3.897 21o 2.357 2.765 3.238 3.794 4.462 24o 2.631 3.100 3.646 4.296 5.084 27o 2.917 3.454 4.085 4.843 5.772 30o 3.217 3.830 4.558 5.442 6.541 60o 15o 2.269 2.764 3.364 4.104 5.038 18o 2.567 3.139 3.837 4.710 5.827 21o 2.883 3.543 4.357 5.388 6.728 24o 3.221 3.982 4.933 6.154 7.771 27o 3.586 4.464 5.578 7.031 8.995 30o 3.982 4.998 6.306 8.047 10.453

The dimensionless force d1, in the direction of the cutting velocity, as a function of the blade angle α, the angle of internal friction φ, the soil/interface friction angle δ, for hb/hi=2.

 hb/hi=3 φ 32o 37o 42o 47o 52o α δ 15o 15o 3.145 3.362 3.578 3.799 4.028 18o 3.672 3.945 4.218 4.497 4.789 21o 4.185 4.519 4.855 5.200 5.562 24o 4.687 5.087 5.492 5.910 6.351 27o 5.180 5.652 6.132 6.631 7.159 30o 5.667 6.216 6.778 7.366 7.993 30o 15o 2.216 2.458 2.717 3.000 3.312 18o 2.567 2.858 3.169 3.510 3.889 21o 2.919 3.262 3.632 4.038 4.492 24o 3.272 3.673 4.107 4.587 5.127 27o 3.629 4.093 4.599 5.162 5.799 30o 3.991 4.525 5.110 5.766 6.515 45o 15o 2.222 2.566 2.954 3.402 3.925 18o 2.549 2.951 3.408 3.938 4.562 21o 2.883 3.350 3.885 4.509 5.252 24o 3.228 3.768 4.391 5.123 6.004 27o 3.585 4.207 4.929 5.788 6.831 30o 3.958 4.671 5.508 6.513 7.750 60o 15o 2.632 3.170 3.817 4.610 5.605 18o 2.999 3.627 4.387 5.329 6.526 21o 3.387 4.116 5.008 6.128 7.572 24o 3.799 4.645 5.692 7.025 8.774 27o 4.240 5.222 6.453 8.044 10.175 30o 4.717 5.856 7.307 9.217 11.833

The dimensionless force d1, in the direction of the cutting velocity, as a function of the blade angle α, the angle of internal friction φ, the soil/interface friction angle δ, for hb/hi=3.

17.9: Appendix I- The Coefficient d1 is shared under a not declared license and was authored, remixed, and/or curated by LibreTexts.

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