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View Full Version : Calculating 3-Link or 4-Link Control Arm Forces



boostin1989
02-16-2015, 03:27 PM
I am designing a 3-link for my car and am looking for a reference to calculate the forces in the control arms. I've made an assumption of the acceleration and that has given me the forward force and torque of the axle. Now I want to get the control arm forces so I can properly design the mounts. I'm ending up with one equation and two unknowns and need to find out what I'm missing.

David Pozzi
02-16-2015, 09:50 PM
Read the Ron Sutton rear suspension thread above, he discussed rear link forces.

boostin1989
02-17-2015, 04:34 AM
I have read that post and it is definitely a good one. I didn't see anywhere in it where it shows how to get actual force values in the links. I am designing this chassis in CAD and am running it through FEA software to get stress results. To run the FEA more accurately I need a reasonable way of estimating the link forces.