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A
AnoopKrishna1-Visitor
1-Visitor
November 25, 2014
Question

Performing a Drop test analysis in Creo-simulate for a plastic component.

  • November 25, 2014
  • 2 replies
  • 10377 views

Hi All,

Can any one help me out in,How a drop test analysis can be done in CAE using creo simulate and what are parameters to be considered while performing the analysis?

Thanks,

Anoop Krishna.

2 replies

D
DavorGranic16-Pearl
16-Pearl
November 25, 2014

Simple way is to add force on point of impact that is equal of mass*gravity.

A
AnoopKrishna1-VisitorAuthor
1-Visitor
November 25, 2014

Hi Davor,

Thanks for your reply,

Can u explain in a step by step procedure to me,As i was new to Creo-Simulate.

Attached a file,So that u can do a drop test analysis on it.

Thanks

Anoop Krishna M.

D
DenisJaunin15-Moonstone
15-Moonstone
November 25, 2014

hello,

In the basic knowledge of PTC there several explanations in shock conditions as well as a model, it is for an older version 2000i.

Kind regards.

Denis.

http://support.ptc.com/cs/fr_21/howto/mst2742/mst2742_f.htm

G
gfraulini17-Peridot
17-Peridot
January 30, 2017

I've tried what is suggested in this two papers:

  1. http://www.google.ch/url?sa=t&rct=j&q=&esrc=s&source=web&cd=4&cad=rja&uact=8&ved=0CDMQFjAD&url=http%3A%2F%2Fpfproe.pl%2F…
  2. http://support.ptc.com/cs/fr_21/howto/mst2742/mst2742_f.htm?_ga=1.255711937.857534450.1425991567

 

but I don't understand why, in each of them, the point of impact is not where we have the maximum stress.

 

Rather, it seems that there is no stress (Von Mises) near the area of imposition of the load.

 

 

Furthermore in the PTC examples you set the load as a pressure of 1 MPa; ok but nobody talk about the area. This is because you let the load change by the function specified in the Dynamic Time Analysis: this function is obtained from a previous analysis, e.g. in Mechanism, as a force curve (Newton) in function of time. Using the 3D Contact in mechanism, you can estimate also the variation of contact area.

So in Mechanica/Simulate you impose the force curve on an area that you can take as the max or the average of the value of the Motion/3Dcontact measure.

But the load is a pressure, not a force, so in my opinin you have to impose a pressure of 1 [MPa]/Area [mm^2] and let vary this load by the function.

 

Cattura3.JPG

 

In this manner you impose the real force of the curve.

 

What do you think?

J
jwagh17-Peridot
17-Peridot
July 27, 2022

Is the best way to still do a drop analysis via Creo Simulate? All of the links in this thread are dead, does anyone have a good tutorial besides:

https://www.ptc.com/en/support/article/CS76643

 

tbraxton
tbraxton22-Sapphire II
22-Sapphire II
July 28, 2022

If you need a high fidelity simulation of an impact or collision event you need a nonlinear capable sim code. I do not think Creo simulate is the best option for this. You will need to be able to deal with contact elements that separate and come back together as one example where I think Creo is lacking. I could be wrong if they added functionality but the last time I looked at the tool it could not support these things.

 

ABAQUS is the solver used in most of the designs I have worked on that had impact simulation done on them. It is $$$$$ and you need someone skilled in the use of it in order to get an ROI. 

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