Hi,
I know that we can animate the rotation of gears inside SWX using the tools available. I would like to know can we calculate the stresses getting developed at the matching points of these gear tooth dynamically i mean to say i need to know the stresses inside gears as it actually rotates. I have given 3D contact b/w gears and i dont get a satisfactory results. See the attached image any help is highly appreciated thanks
Hi Ian,
thanks for your reply, but still i am unclear. i am attaching the SWX model which i was working on can u please look into it thanks
Hi Shankar,
Stress recovery in motion does not support contact forces, so they are ignored which will lead to your lack of significant results. In addition you have not load applied to the system. You should be putting a reactionary torque on the driven gear or the loads are going to be insignificant.
Personally for what you are trying to do I would just do this straight in simulation, at restraints to represent the shafts connected to the gears (add holes to the centers of the gears and restraint those accordingly). Lock rotation on the driving gear and apply a rotational force/torque to the driven gear. Then with no penetration contact you will get the right solution.
As I mentioned earlier, this excludes the rotational velocity. I suppose you could add that if you were focusing on one gear or the other.
Cheers,
Ian
Hi Ian,
thanks for your reply will check and let you know.
Hi Shankar,
It's a little unclear, are you taking the loads from motion and applying them in Simulation? Big issue there is that 3-D contact forces are not supported in the automated load transfer so you will get garbage. The problem is that forces need to be specified on the areas of contact, and when it comes to gears, this is a very localized region.
If you're running the motion simulation you can get reasonable contact force results, and it is possible to take the force results from motion to look at stresses in the model, but it will be done manually. If the stresses due to rotation are not as significant as the load transmission through the gears, then you can take the moment force results from motion (ie there is a torque being transmitted through the shafts) and you apply one of those torques to the gear shaft and lock the second gear shaft in simulation with the parts in the relevant orientation for the peak motion force. Define no penetration contact between the gear teeth and away you go.
As far as gear contact force results in motion, you should use precise contact, and you may need to refine contact parameters and sovler settings to smooth out results. Ignore friction since it's a rolling contact.
Hope this helps,
Ian