Static analysis for one rear axle truck

[RazielVallejo]

I'm performing one FE static analysis for a rear axle.

My procedure will be to apply certain loads to this axle, in order to obtain a baseline model, and then run an optimization analysis to obtain an equivalent model in stiffness but with less mass.

Question is if you guys know about any standard to apply loads for rear axle trucks (in this case looks that is a dynamic analysis but this is just the first approach).

Thanks in advance

 

[GregLocock]

Yup.

If the static vertical load on each wheel is W then try 3W vertically, 1W laterally and 1.5W longitudinally, for a sprung axle on a truck.

Those would be reasonable, but not excessive loads. You probably need to increase them by 50% or so for limit loads.

Is this an academic exercise? If not, what usage profile do you have for the truck, what sort of truck is it?

I'm surprised stiffness is even a criterion for a live axle.








Cheers

Greg Locock

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.

 

[RazielVallejo]

Thanks Greg.

Well I'm usually ran models for RAM truck chassis... axles is a potential area and perhaps I’m just anticipating to present a proposal for a Trailblazer which follows one methodology to reduce weight or to improve fatigue life... if this looks interesting for them, a more realistic project can be made. Ones again this is the first aproach.

I downloaded two papers that made dynamics analysis on rear axles from SAE’s website... but still wondering if there are standards for typical load cases.

Regards,
Raziel

 

[GregLocock]

Oh, that's not really what I meant by a truck. The standard for a car is called 3 2 1 - 3g vertically, 2g longitudinally, 1g lateral. That'll do to get you in the ballpark. After that you need real data, and since trailblazer is a competitor I'll leave it there - but I'm sure GM do have the correct loads available.



Cheers

Greg Locock

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.