Negative Volume
Negative Volume
@negativevolume
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Joined: January 16, 2019 3:58 am
Last seen: November 25, 2025 7:59 pm
Topics: 13 / Replies: 659
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RE: Modelling of I-beam in a column

@saberman12 I'm checking in on old topics. Did you get your i-beam modeled using shells or beams correctly?

5 years ago
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RE: Failure due to negative volume.

Hi @sumit007, I'm sincerely sorry that I never got back to you on this. Things got very busy for me. Did you get this issue solved? It looked like ...

5 years ago
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RE: How to determine the optimal mesh size for a model with more than two parts?

@csuznxg Got it. But yeah, what you are currently doing is the "easiest" way around this for the short term. However, if you ever have to do a paramet...

5 years ago
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RE: How to recreate NULL material model with dynamic viscosity term in LS-Dyna using a UMAT?

Hi @kennedy, I apologize for missing this topic. Seems like an interesting venture to undertake. I'd be interested if you figured out what the issue...

5 years ago
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RE: SPG Section not working

Hi @willjust, I know this is 5 months late but if you ever have issues with "forrtl:severe (157): Program Exception - access violation" try running...

5 years ago
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RE: Initial and boundary condition for temperature in Fluid.

Hi @charu, Sorry that I missed this topic. Did you find a keyword that worked for initial temperature for a fluid? And did you get the correct boun...

5 years ago
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RE: How to determine the optimal mesh size for a model with more than two parts?

Hi @csuznxg, I apologize for missing this topic. Did you find a procedure for this that worked for you?

5 years ago
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RE: Rigid Part Contact Not Behaving as Expected

@pjay Did you ever figure this out? I am going back and looking for any topics that I let slip by so I wanted to check in.

5 years ago
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RE: How to apply a prescribed motion for displacement control on a rectangular solid body?

@sonlong Sorry that I missed this way back when. But you shouldn't need both *Boundary_prescribed_motion and *Boundary_spc. You should just be able to...

5 years ago
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RE: Crash Simulation

@harsha77 Assuming I'm too late but for anyone who may also have this issue: If your material model itself is correct and you are seeing bending where...

5 years ago
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RE: FEA: Boundary Conditions Help for Multicopter

@shahid_ameen_khan I'm not at all familiar with Nastran but what you are trying to do seems simple enough. Do you have to define all translational and...

5 years ago
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RE: What may be the cause for "forrtl: severe (157): Program Exception - access violation" error? How can it be addressed?

@djsburra That's great news! I know this is a common head-scratcher so it's good to know that something worked to solve it!

5 years ago
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RE: What may be the cause for "forrtl: severe (157): Program Exception - access violation" error? How can it be addressed?

@djsburra also, I see that you are using single precision denoted by the "_s_" after smp in your version. Try using a double precision version if you ...

5 years ago
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RE: What may be the cause for "forrtl: severe (157): Program Exception - access violation" error? How can it be addressed?

@djsburra Yeah that's strange. Let me know if the version works. I believe that this error can be traced back to something wrong with the contacts in ...

5 years ago
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RE: FEA: Boundary Conditions Help for Multicopter

Hi @shahid_ameen_khan, Seems like a cool study! What FEA solver are you using for this? I would just assume that the easiest way to do what you are...

5 years ago
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