Make sure that the proper side of the punch bottom surface is selected. Try adding some point mass/inertia to the rigid body reference point. You should also consider replacing discrete rigid bodies with analytical rigid surfaces whenever possible. Check the energy outputs (especially ALLKE and...
Can you provide more details ? What are the boundary conditions ? What materials are used for each region ? How are the regions connected (any tie constraints or electrical contact) ?
From the 3DS Software Downloads page but you have to log in using your customer account and then you will find the software available to you. Look for Abaqus, you will see the most recent fix pack files by default. Installation is very simple, you just have to click Next after unpacking and...
You have to install a fix pack for Abaqus 2025 to make it work. Possibly the newest one (HF3) but the USER TYPE parameter was introduced in Abaqus 2025 HF2.
Alternatively, you can use the old syntax:
*MATERIAL, NAME=ABQ_PHASE_TRANS_TI6AL4V
Consistent commonly used SI(mm) units are:
- Young’s modulus [MPa]
- density [tonne/mm^3]
- thermal conductivity [mW/mm*K]
- specific heat [mJ/tonne*K]
If you search for "Abaqus units" you will find some helpful tables with other consistent unit systems.
You should always check the warnings. Here you have unconnected regions, negative eigenvalues and numerical singularity messages. Check the nodes where issues occur. You can use the Job Diagnostics tool to highlight them. This is easier than reading plain .msg files. Another way is to upload...
How far are they ?
Is it Abaqus/Standard or Explicit ? Are you using viscous regularization ? Did you check the standard energy outputs (especially ALLSD and ALLVD vs ALLSE) ?
Have you seen the DS Knowledge Base article "Abaqus/Explicit VUMAT for the simulation of damage and failure in unidirectional fiber composite materials" ?
You should make sure your setup doesn’t differ significantly from the reference experiment. Some calibration of material data might be...
This geometry is yellow (sweep meshable) right away but you will get invalid (distorted) elements if you use the default settings. You should assign proper global and local seeds and apply one transverse partition in the middle. Then it will work.
There are also composite sections for solid elements so you can use layups with them. This is often used e.g. when analyzing nozzle regions of composite pressure vessels.
Try these steps (based on the aforementioned KB article):
1. Add the subroutine file as Input files parameter in the Abaqus component.
2. Enable the Fixed file name checkbox and specify the Fortran file name in the Destination section.
3. Add the user command to the Abaqus command.
4. Make...
You could use submodeling or shell-to-solid coupling to model that small region with solid elements and including some fillets thus obtaining more realistic result.