Snap fit hook optimization

Hello, Gyorgy,

This example is very interesting and I would be interested to share these files.

Best regards.

Denis.

You could try contacting customer support to see if they can hook you up. I suspect these are in the PTC university collection.

Thanks guys, I will send to PTC an e-mail about this. I hope they will share with me this fine analysis.

Regards: Gyorgy

Hi Gyorgy,

Thanks for your interest in this new capability in Creo 3.0. Sadly the model I used is a customer model and I cannot share it. However, I am currently creating a new sample model which I would be happy to provide.

Still wrapping it up and running a test.....should be available shortly.

Please send me an email (-) and I can send you the files.

Thanks,

Mark

Mark,

A couple a questions.

What was the state of the 'press fit' (initial interpenetration)' check box in the defnition dialogue?

How did you choose your time step?

Thanks

Charles

Hi Charles,

I have created a series of contact interfaces with finite friction in the assembly to control how the parts interact with one another. Once you assign a contact interface, the Press Fit check box will be automatically checked. I kept the default value of 0 mm for the initial interpenetration.

I ran the analysis at a variety of steps to: 11, 21, 31, 61. The higher the step number will reduce the size of each step when spaced equally. The smaller time step will help provide a more accurate convergence of the nonlinear solution. However this will yield longer solving time.

Thanks,

Mark

Mark,

The reason for the question re steps is that poor selection can cause the parts to miss each other as the actual point contact occurs can lie between time steps.

Combining this 'missing' of the contact with the initial interference check box state has caused me some counter intuitive experiences,

Next time I have one I'll pass it across if I can.

Thanks

Charles

Hi Charles,

Good point and I have seen that as well from time to time. I tend to run a number of tests with different steps to determine the best method. In fact the analysis will give you a reminder to reduce the step time to gain improved accuracy.

If you come across example on counter intuitive experience....would like to see it.

Thanks

Mark

Hello, Mark,

Thank you for your.

This seems quite complex to me.

I just followed a Webinar PTC:

Using PTC Creo to Optimize Product Designs -.

It is a demonstration of the closure of the box or the battery is housed for the helicopter.

It is a system with a clip, very interesting but far too fast, can not see how it's done.

Would you have the opportunity to get this demonstration.

Best regards.

Denis