How to fix the center of a Gear?
How to fix the center of a Gear?
(OP)
Hi,
I´m trying to simulate the contact between two gears. Each gear has 60 triangular teeth and all of them are in contact at the same time. I have one external gear and one internal gear. The internal gear is driven by a torque applied at it center. I know that I should fix the center of the gear but I don´t know how!, I mean which command should I use. I´ve been reading the manual and I couldn´t info about my problem.
I´ve started to use this program three weeks ago, so I´m new!
Best wishes.
Ezequiel
I´m trying to simulate the contact between two gears. Each gear has 60 triangular teeth and all of them are in contact at the same time. I have one external gear and one internal gear. The internal gear is driven by a torque applied at it center. I know that I should fix the center of the gear but I don´t know how!, I mean which command should I use. I´ve been reading the manual and I couldn´t info about my problem.
I´ve started to use this program three weeks ago, so I´m new!
Best wishes.
Ezequiel





RE: How to fix the center of a Gear?
RE: How to fix the center of a Gear?
Do you know how to fix the center of a gear?
RE: How to fix the center of a Gear?
http://www.eng-tips.com/viewthread.cfm?qid=181922
Rob Stupplebeen
RE: How to fix the center of a Gear?
Thanks
I want to fix the center of a cylinder and then apply a torsion moment (the only DOF free should be the axis of rotation) to see the rotation.
For doing this, I create a reference point on the axis of rotation and a cylindrical coordinate system. Then I create a Kinematical Coupling Constraint to apply the moment (on the RP).
For fixing the axis of rotation should I apply the BC on the RP o should I create another RP on the axis of rotation and create a Distribution Coupling Constraint to apply the BC ?
I´ve been reading the manual but I have several doubt about it. If anyone could give me some tips about it I would be greatly appreciated.
Thanks in advance!!
RE: How to fix the center of a Gear?
Rob Stupplebeen
RE: How to fix the center of a Gear?
I create the RP and the Kinematic coupling constraint. After pick this RP as a control point I chose the "node region" and I applied a torsional moment in the direccion of the axis of rotation (UR3).
As you said, On the same RP I apply the BC for my model (U1 U2 U3 UR1 UR3)
Doing this I have this error: "Excessive distortion at a total of 90 integration points in solid (continuum) elements"
What I´m doing wrong?
Thanks!
RE: How to fix the center of a Gear?
2. Try applying a very small rotation instead of the moment.
Rob Stupplebeen
RE: How to fix the center of a Gear?
I would try what Rob suggested above aswell.
Martin Stokes CEng MIMechE
RE: How to fix the center of a Gear?
I´m sorry for not answer before.
I´ve coupled the reference point to a surface. One RP for the Driver and one RP for the Driven. Both RPs are in the axis of rotation.
For the Driver, I applied the moment (UR3) and the BC(only free UR3) on the RP. For the Driven I applied the BC (fully fixed) on the RP. Both are Kinematic Coupling.
The problem is that I have the stress till the half of the tooth length. After the half length, the value is zero.
Do you know how can I fix it?
Thanks in advace.