static load conversion
static load conversion
(OP)
Hello guys !!
I am working on a project of static analysis( backhoe loader) ...
this vehicle hits the other vehicle at the speed of 5.71 kph (@1100 rpm , mass = 8000kg ).
how can we convert these load into a static load ...?
pls help me out ...
with thanks
R. vinod raj
I am working on a project of static analysis( backhoe loader) ...
this vehicle hits the other vehicle at the speed of 5.71 kph (@1100 rpm , mass = 8000kg ).
how can we convert these load into a static load ...?
pls help me out ...
with thanks
R. vinod raj






RE: static load conversion
RE: static load conversion
Mike McCann, PE, SE (WA)
RE: static load conversion
In some situations like that, they may do actual testing (I've seen video of that with crash-resistant barriers)
In some situations, the requirements may be based on absorbing energy (I've heard of that as a criteria for roll cages on bulldozers, etc.)
RE: static load conversion
As everybody is noting, impact is a dynamic event, not a static one. The force is a function of deceleration, due to springy components, deforming components, and the thing you hit, moving.
You can make some assumptions, and get an equivalent static force, but those assumptions may make your analysis nonsense.
--
JHG
RE: static load conversion
If:
- v0-initial velocity
- v-velocity at the moment of impact
- s- the path from v0 to v
- a- acceleration
Than acceleration is equal to: a= (v² - v0²) /(2*s). Hence, the v0=0 m/s => a=v²/2s.Therefore, the force is F=m*a
The other way is to work out the collision, with impulse...
However, you must be aware that this isn't a static force, because you don't have a gradual increase of the force over time. You have an impact -dynamical response. Look the attachment
Live long and prosper!
RE: static load conversion
Live long and prosper!