determination of urto forza

[TECNOMODEL]

It'll be time, but I just don't jump out.

from the following diagram with the data indicated as embroidery the force in n that applies to the parallelepiped where indicated by the arrow?
Thank you very much, I hope in the morning to be sufficiently lucid to understand:frown:

 

[cacciatorino]

depends on the yield of the wall against which your pendulum hits. wall yielding--> small force, rigid wall--> large force.

read this discussion:http://www.cad3d.it/forum1/threads/23296-forza-impatto-ne-ho-sentite-tante

 

[meccanicamg]

It would be enough to look for the pendulum of charpy that is explained in mechanical technology for over 60 years. definitely depends on whether it is an elastic or anaelastic impact.

 

[TECNOMODEL]

It would be enough to look for the pendulum of charpy that is explained in mechanical technology for over 60 years. definitely depends on whether it is an elastic or anaelastic impact.

I knew I had studied something, but I couldn't find the right memory.
I'll go over it.

 

[TECNOMODEL]

depends on the yield of the wall against which your pendulum hits. wall yielding--> small force, rigid wall--> large force.

read this discussion:http://www.cad3d.it/forum1/threads/23296-forza-impatto-ne-ho-sentite-tante

Interesting, thank you.
so I would say that my problem is not determined.
I do not know the speed of the object, the machine performs a shot per second but I do not have the certainty that the descent of the pendulum and its climb are equal.
In addition, and here is the biggest problem, I have from time to time a different detail that is tested.
being the particular composed of a part in abs with inside a metal soul know stiffness is, for me, very difficult.

If I always considered it as a completely rigid body, would it be too limiting?

 

[Matteo]

It would be enough to look for the pendulum of charpy that is explained in mechanical technology for over 60 years. definitely depends on whether it is an elastic or anaelastic impact.

not so much, as he writes hunter also depends on the local rigidity of the objects that collide.

 

[Matteo]

with reference to the other thread (from which this derives): to avoid having to simulate a "dynamic" situation (and remaining in favor of safety) I would consider the pendulum as infinitely rigid, statically applying to the fixed object an increasing force until determining a job (vector shifting the point of application by force carrier) equal to that accumulated by the pendulum. the dynamic "dissipations" are lost but the approximation is in favor of safety (always with reference to the other thread: we are not trying to simulate exactly the reality, but a calculation model that allows to predict if n piece is adequate: the difference is subtle, the important thing is to approach reality on the right side).

 

[TECNOMODEL]

thanks matteo, always clear and constructive.

a doubt, how do you determine the shift resulting from the applied force?

 

[Matteo]

a doubt, how do you determine the shift resulting from the applied force?

Unfortunately, the only way is to measure it through fem simulation (I use simulated creo and I can define a punctual measure that is returned to me in the report, but I think it is the same with other software: in the worst case you have to measure it in the graphic window), so the process is iterative (but if you can use a linear model - see the interaction between the two materials - you do it in two steps to the maximum). Underline: we are always in the hypothesis of building a model that is index of behavior not a model that reproduces in detail the physical reality.

 

[TECNOMODEL]

Okay, as soon as I have a little time, I'll try.

Thank you.