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: Simulation stops after a certain point

Hi @syed2468, Wow I've never seen that. Are you running this in a batch or using some script that you are unfamiliar with the run the simulation? ...

5 years ago
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RE: Tensile Strengh in CSCM (mat_159)

Hi @marioraulf, Are you using *Mat_CSCM or *Mat_CSCM_Concrete? Looks like the concrete version already has many material parameters built into it l...

5 years ago
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RE: Nominal strain dependent constraints on selected node set

Hi @msahin89, Are these plates compressing the lattice? And is the purpose of the constraint to keep the lattice in place until loading begins? Als...

5 years ago
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RE: The damper

@marso1 Also, try outputting (*Database_rcforc) and plotting the contact force between your dampers and the bar and damper to damper. This will help d...

5 years ago
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RE: The damper

@marso1 are damper up and damper down in contact with each other? And what is that distance? Also do you have *Control_contact? Make sure the Ignore o...

5 years ago
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RE: The damper

@marso1 and what is the distance between the end of your dampers? Just checking that it is more than 4 mm.

5 years ago
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RE: The damper

@marso1 have you checked the shell thickness of the damper like @samuelbas mentioned? Or do you have any defined thickness in the contact? (MST, SST)

5 years ago
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RE: The damper

@marso1 you need to use a constant force curve over the duration of the simulation. For example: Time Force 0 sec 200N 1 sec 200N Are...

5 years ago
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RE: The damper

Hi @marso1, Moving this to the LS-Dyna help forum since your question is about the simulation itself. I'll need more information to help with th...

5 years ago
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RE: How to define a constant velocity in LS-PrePost

Hi @felix_fedi, Create a node set for that solid part and then use *Boundary_prescribed_motion_set to reference that set under NSID. Then select th...

5 years ago
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RE: 3D Meshing

Hi @anis, This will be a good place to start if you want a hex mesh. If you just want a tet mesh you will need an enclosed solid, meaning that ther...

5 years ago
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RE: ASCII output in LS-Dyna

@manoz21 okay so you should set your termination time to 0.1 seconds and the dt=1e-4 for the Database_ELOUT and Database_NODOUT

5 years ago
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RE: ASCII output in LS-Dyna

@manoz21 are your model units in seconds or milliseconds?

5 years ago
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RE: ASCII output in LS-Dyna

@manoz21 Okay. Back to my first comment, what is your termination time?

5 years ago
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RE: ASCII output in LS-Dyna

@manoz21 add *Database_binary_d3plot and set DT to what you want your animation output frequency to be and then see if you are still getting errors.

5 years ago
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