[Click for the tomb-F.fe datafile in a second window.]
This datafile adds rotation about the lower front edge of the chip. It is derived from tomb-E.fe, so the chip contact is represented by facets. This is done for confidence in energy and volume calculations. When the contact facets are removed in tomb-FF.fe, we can compare the numbers to make sure tomb-FF.fe is implemented correctly.
|Tilted to 30 degrees.||Lowered to pad.|
|Evolved to 9516 facets.||Undercutting flaw at top corner.|
tilt, in degrees.
distis calculated as the ratio of distance to the pad to the sum of distances to the pad and the chip.
change_tiltin the file "torque.cmd" changes the tilt. It is invoked by first setting the variable
new_tiltto the new tilt angle.
readsection uses the
change_tiltcommand to set the initial tilt at 30 degrees. It is much easier to do it this way than change all the vertex coordinates up above in the datafile.
calc_tilt_torqueto calculate the torque, which is preserved in the variable
gofar, there is a slight flaw at the top corners; the outer fluid surface penetrates into chip instead of the corner vertex pulling down, as seen in the close-up image above. No vertex is inside the chip, which makes this tough to handle with the mechanisms in place. The flaw is probably so small there is no significant effect on the forces. If it is deemed a problem, either move the corner vertex down by hand, or put in diagonal constraint plane (this is a general technique for handling a surface bumping into a ridge; have vertices on a constraint plane running through the ridgeline.)