topic Re: Contact Solver Does Not Stop Two Objects from Passing Through Eachother in Inventor Forum

Contact Solver Does Not Stop Two Objects from Passing Through Eachother

Anonymous — Thu, 02 Nov 2017 00:04:40 GMT

I am attaching an assembly file for a project I'm working on in Inventor Professional 2018 to help the company I work for decide if Inventor is a good way to go for our needs. I am running into an issue however when I create a contact set and test it with the contact solver. It seems that my bolt (this is a lock assembly I'm working on) is able to pass right through the internal latch. Everything else seems to be contacting as it should. I'm wondering if since the parts that are touching are so thin/small that perhaps that's giving me issues?

I'm a true novice to this software, so I appreciate any assistance I can get!

Re: Contact Solver Does Not Stop Two Objects from Passing Through Eachother

johnsonshiue — Thu, 02 Nov 2017 00:43:55 GMT

Hi! Please attach the part ipt files. The iam file is like a wrapper. There are two possibilities that I am aware of. 1) Contact Solver is not enabled. Please go to Inspect section -> enable Contact Solver. 2) There is pre-existing interference between components. This means the Contact Solve is in failed state due to the interference. To check that, you can run Interference Analysis and then make sure components are not interfered with each other.

Many thanks!

Re: Contact Solver Does Not Stop Two Objects from Passing Through Eachother

Anonymous — Thu, 02 Nov 2017 14:47:32 GMT

Hi, Thank you for your response. I am attaching 3 of the 4 files associated with this assembly. I will upload the 4th in the next response.

Re: Contact Solver Does Not Stop Two Objects from Passing Through Eachother

Anonymous — Thu, 02 Nov 2017 14:48:03 GMT

File 4 of 4 attached.

Re: Contact Solver Does Not Stop Two Objects from Passing Through Eachother

mcgyvr — Thu, 02 Nov 2017 15:21:37 GMT

@Anonymous wrote:

I am attaching an assembly file for a project I'm working on in Inventor Professional 2018 to help the company I work for decide if Inventor is a good way to go for our needs. I am running into an issue however when I create a contact set and test it with the contact solver. It seems that my bolt (this is a lock assembly I'm working on) is able to pass right through the internal latch. Everything else seems to be contacting as it should. I'm wondering if since the parts that are touching are so thin/small that perhaps that's giving me issues?

I'm a true novice to this software, so I appreciate any assistance I can get!

Fix all that ^^^ then try again..

When inventor is already in a "oops" (red +) state all bets are off...

Re: Contact Solver Does Not Stop Two Objects from Passing Through Eachother

Anonymous — Thu, 02 Nov 2017 15:55:26 GMT

Hi, Thank you for your help! I wasn't even aware that there was an indicator that there were issues. I've gone through every part and resolved all issues I could find and still seem to be encountering the original issue. I'm attaching the updated files (3/5 in this response and 2/5 in the following.)

Thank you!

Re: Contact Solver Does Not Stop Two Objects from Passing Through Eachother

Anonymous — Thu, 02 Nov 2017 15:55:57 GMT

Last of the updated files.

Re: Contact Solver Does Not Stop Two Objects from Passing Through Eachother

mcgyvr — Thu, 02 Nov 2017 16:38:11 GMT

@Anonymous

There seems to be an issue there (might be a bug) in that the browser order is effecting how the contact sets function

The way you had it when I moved the latch it seemed to be ok but moving the bolt was causing problems.. If I dragged the latch above the bolt then the opposite happened.. That should not be happening AFAIK.. (I never use contact sets or the solver)

@johnsonshiue Johnson are you seeing the same?

Re: Contact Solver Does Not Stop Two Objects from Passing Through Eachother

JDMather — Thu, 02 Nov 2017 16:51:42 GMT

Why is 1010AM-2Body 1 and 2 included in the Contact Set?

Also, why is your assembly at a "weird" angle?

Rather than dragging with mouse - you should probably Drive Constraint to test Contact Sets.

And, if you are serious about physical dynamics - I would use Environments>Dynamic Simulation rather than Contact Sets.

Re: Contact Solver Does Not Stop Two Objects from Passing Through Eachother

johnsonshiue — Thu, 02 Nov 2017 19:25:42 GMT

Hi! There is a bug in this case. Contact Solver should be able to detect the collision. It seems to have something to do with the small faces colliding with each other. The behavior is not right regardless. I will work with project team to understand the behavior better.

Many thanks!

Re: Contact Solver Does Not Stop Two Objects from Passing Through Eachother

Xun.Zhang — Fri, 03 Nov 2017 03:15:08 GMT

Hi Johnson,

Thanks for passing through!

Hi Guys,

I have submit a ticket to track down the problem, thank you all!

Thanks