Hi
I have a basic question
I was trying to calculate the torque axis at the rear suspension for an AWD, the way I understand it is the resultant of the driveshaft torque axis and the halfshaft torque axis , now if I consider them as 2 3D vectors having different origins , and I want to...
Greg
I am at a stage where my bar rate with bushings using a tool i created is coming out pretty close compared to Adams and Nastran.
But I am stuck at one spot, I want to model the links in the system as well and get the stabilizer bar system rate,
For a bayonet-bayonet (two rubber bungs...
Well I was actually interestd in the effective bar rate at the wheel, i thought if i could get the effective bar rate at the link end and use the simple motion ratio formulas to get the effecting bar rate at wheel
I am not sure how accurate that would be but just a try
Thanks
How about using a spool bushing at the ends
that can probable be modeled as a 6D spring element
I know there is another one the grommet kind thats complicated I have no idea how to model that
Thanks for your help
Well Ok lets talk about the complex situation where the links are inclined
How do you model that complex situation in ADAMS today lets just assume a ball-ball link
i would really like to understand how the load path is defined because I am assuming even in ADAMS you use beam elements to define...
Yes it is a non-linear model but the non-linearity is only in the bushings (3D springs) and in the links and am using the beam element with 6 dof/ node
I am not modeling the control arms but i know the motion ratios through my kinematics model and I know the deflections
but how do i calculate...
Hello all
I have developed a Finite element tool that uses beam elements to model a stabilizer bar and have also built in the bushings.
I am able to get the deflections for all the beams, my question is what is the most accurate way (use which deflections) to get roll stiffness number for the...
edrush
Let me see if I understand it correctly
I am trying to use the equations for interference fits in thick cylinders to calculate the hoop stress ( you can find these equations in any machine design book)
In tht case I am assuming a bushing is inserted into a boss , only the outer sleeve...
Hello
Is anybody familiar with how a press fitted bushing inside a boss (solid outer metal + rubber+ inner metal) is tested for hoops stress
Once a supplier told me that they test it with no rubber inside the bushing , my question is in that case if I wanted to hand calculate the hoops...
Greg
When you say width of the bar do you mean the bar diameter or the moment arm length
And also the reaction comes out in the opposite direction to the applied force hence the deflection due to the reaction force is in opposite direction, so do I have to subtract the deflection at bushing...
I had another question regarding calculating sta bar roll stiffness, since most of the static formulas available for calculating roll stiffness do not take into account bushing stiffness at body attachment point
I thought of deriving a formula which takes into account bushing stiffness as well I...
I was trying to do hand calculations to get to an approximate solution for the control arm, since I have assumed rigid supports at the bushings using simple statics I am unable to find the bending moment at the bushing ends as it is statically indeterminate
Is there any approximation I can make...
Well john is right that inertia relief is used to just balance the residual forces
I was trying to do the same thing I wish i could show you guys my free body diagram
Let me try and explain what I am doing
Inputs
A- Arm pivot points
Fore-Aft and lateral loads at bj
Rigidly fixed bushings...
I am not a FEA analyst but most FEA guys I have talked to in my company about constraining suspension compoennets, there answer have been " we dont use constraints we used inertia relief analysis"
Well the link that john pointed is pretty good and goes over the basics,
I tried the same...
