The prescribed displacement in COMSOL stops at a certain point because it is limited by the boundary conditions set by the user. These boundary conditions define the extent and direction of the displacement, and once it reaches the specified limit, it will stop.
Yes, you can change the point at which the prescribed displacement stops by adjusting the boundary conditions. You can either increase or decrease the displacement limit or change the direction of the displacement to a different point.
If you do not specify a stopping point for the prescribed displacement, it will continue to displace until it reaches the edge of the model or until it encounters a boundary condition that stops it. This can lead to unrealistic results and should be avoided.
You can monitor the displacement in the results section of COMSOL. If the displacement reaches the specified limit, it will remain constant at that point. You can also check the boundary conditions to see if they have been reached.
Yes, you can use multiple stopping points for the prescribed displacement by creating multiple boundary conditions with different displacement limits. This can be useful for modeling complex systems where different parts may have different displacement limits.