Albisbaralbi
Guest
Hello everyone,
I have a problem with a simulation I'm trying to carry on. I have to simulate the insertion of a tool inside a channel and then simulate the fact that it remains stuck in the tip while the handle of the instrument continues to turn and evaluate the stress to understand when it comes to breakage.
First I did only torsion tests, so without inserting the instrument in the channel, but in a straight position and I found that around the 100 ° rotation of the handle the stress in the points near the tip is about 1040 mpa.
I then did some tests by inserting the instrument into the channel and after some attempts and modifications I managed to manage the contact between the bodies and the twist of the instrument inside. Now, at the same rate of rotation I expected more stress values than the simulation in a straight position, on the other hand there is an extra compulsion that the instrument must bear. but the peak of stress is about 730 mpa and among other things happens in the phase of insertion of the instrument in the channel. during the twist stage the maximum stress remains almost constant as you can see in the chart.
I don't understand what I'm wrong. the advance is the rotation of the handle I imposed them with a remote displacement, also the block of the tip I imposed it with a remote displacement that blocks the rotations around the axis z (the axis z of a new system of coordinates rotated 60° respect the axis y, as the final part of the channel) that is activated however only in the third load step dedicated to the torsion precisely. the channel is locked with a fixed support.
I thank anyone who can help me or give me advice to try to improve.
I have a problem with a simulation I'm trying to carry on. I have to simulate the insertion of a tool inside a channel and then simulate the fact that it remains stuck in the tip while the handle of the instrument continues to turn and evaluate the stress to understand when it comes to breakage.
First I did only torsion tests, so without inserting the instrument in the channel, but in a straight position and I found that around the 100 ° rotation of the handle the stress in the points near the tip is about 1040 mpa.I then did some tests by inserting the instrument into the channel and after some attempts and modifications I managed to manage the contact between the bodies and the twist of the instrument inside. Now, at the same rate of rotation I expected more stress values than the simulation in a straight position, on the other hand there is an extra compulsion that the instrument must bear. but the peak of stress is about 730 mpa and among other things happens in the phase of insertion of the instrument in the channel. during the twist stage the maximum stress remains almost constant as you can see in the chart.I don't understand what I'm wrong. the advance is the rotation of the handle I imposed them with a remote displacement, also the block of the tip I imposed it with a remote displacement that blocks the rotations around the axis z (the axis z of a new system of coordinates rotated 60° respect the axis y, as the final part of the channel) that is activated however only in the third load step dedicated to the torsion precisely. the channel is locked with a fixed support.I thank anyone who can help me or give me advice to try to improve.