Hello all,
I'm doing an FEA on a frame and when it is meshed, the frame looks normal. As soon as I calculate results, the one tube looks like it's disconnecting and reconnecting in a different spot. I can't see any reason this would be happening, but maybe someone could give some input!
I attached pictured to visualize what I'm talking about. (I'd be confused too if I were reading this w/out a picture)
So I found out it was actually a cause of making the joint group treated with a clearance of 4 inches. I had done this to remedy two gold dotted joints, representing an open end beam. This obviously isn't open ended. I tried using a different thread to resolve the issue, (ref. Beam Joint Problem ) but the solution didn't work and still treats them as an open end.
The FEA works fine if I exclude this member, but I want to do a rear end collision FEA, which needs to include this member.
Attached is what I mean.
It looks like a symptom of the "curved beam" but you successfully merged the other joints. Make sure whatever sketch lines are making the disconnected beam fully intersect the curved beam sketch.
It would be helpful if you could post the part or assembly.
I attached the file. The line is connecting with the bends.
For some reason the joint solver isn't treating the ends as merged with the adjacent pipe even though the sketch line clearly intersects the adjacent lines.
Not ideal but what you will have to do is create some "interference" between these segments by making a longer overlapping line on the "Engine Bay" sketch. You will have to remove the constraints on that line and draw a new longer line so that the pipe sticks out a little at the ends. What you are finding is that "geometrically" correct and "simulation" correct sometimes do not look the same.
Thanks for the suggestion. I made that line a reference line and made a new tube just barely next to where it was and now it works. Weird, but it works. Thanks
Hi Guys,
It works fine If you copy the side impact study and readjust your loading and fixtures accordingly.
For some reasons, That front impact study doesn't want to merge those joints.
Best,
Mohamed
UPDATE**
The original problem is happening again.....
I tried to delete suppress components and remesh. It doesn't seem to have any problems.
Hi Kevin,
Can you Edit the Stress plot and check ''True scale'' to see if you have the same behaviour?
Best,
Mohamed