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 Yeah sometimes the versions of LS-Prepost won’t visualize changes for certain beam formulations. You can always check the volume of the be...

6 years ago
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RE: Failure due to negative volume.

@sumit007 Sorry I’ll address the issue with uploading .k files. For now just make a copy of the file and rename it to a .txt file and upload it. Are y...

6 years ago
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RE: Modelling of I-beam in a column

@saberman12I’m not sure how sophisticated LS-Dyna’s beam integrations are regarding this. When you say that the size is not changing, do you mean visu...

6 years ago
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RE: LS - DYNA Yahoo group

@hogh I just checked earlier and I’ve had emails being sent to my email. I can try to find your discussion that you are looking for if you like.

6 years ago
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RE: LS - DYNA Yahoo group

@hogh Ah, well then that explains it. And you said that none of the previous topics and discussion will be retained? Has everything already been lost?

6 years ago
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RE: LS - DYNA Yahoo group

@hogh Thats bizarre...get any explanation as to why they are just shutting it down completely? I wonder if it has to do with ANSYS wanting to migrate ...

6 years ago
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RE: LS - DYNA Yahoo group

Hi @hogh, I am but I have not paid much attention to it the last year or so. I didn't hear anything about that but it would unfortunate if it is shutt...

6 years ago
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RE: User subroutine in LS DYNA

Hi @venkateshmd So to clarify, you want to modify the Johnson-Cook material model itself, not just the parameters within the model? Unfortunately, I d...

6 years ago
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RE: I am tying to solve a non-linear problem using Ls-Dyna IMPLICIT solver. However, I am unable to achieve convergence.

@mohammad_basri Just change the extension of the file from .msg to .txt and upload it.

6 years ago
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RE: Activate Parts Part Way Through Simulation

@pjay The 3D elements should be fine as well to model as rigid since you already have them. Runtime is determined by the timestep of your simulation, ...

6 years ago
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RE: Activate Parts Part Way Through Simulation

@pjay Is the solid debris going to be analyzed in any way or are you just studying the wave response? Because you could just model the debris as rigid...

6 years ago
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RE: Activate Parts Part Way Through Simulation

@pjay This is a great question. I don't know of any way to do this specifically. I do know that some things in LS-Dyna have birth times, meaning they ...

6 years ago
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RE: I am tying to solve a non-linear problem using Ls-Dyna IMPLICIT solver. However, I am unable to achieve convergence.

@mohammad_basri Did you send the message file to my email? I’m sorry, this slipped by me.

6 years ago
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RE: Ls Prepost

Hi @cbb, What is the boundary condition on the simulation? (velocity, force..ect) I would first check that the changes that you are making are actual...

6 years ago
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RE: Reaction forces at nodes under NODAL_RIGID_BODY

@harsha Awesome, great to hear that you got it working! Great job

6 years ago
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