Do the coordinate systems in your cutting file and model match exactly? If not, match these. And is the element size of your model coarse than the inc...

I assume it has to do with 3D element deletion. Have you checked the LS-Dyna material manual?

Have you tried using zero thickness cohesive elements between the plies with a material model with some form of damage initiation/evolution?

Sure you can actually download the final models for each video here: Changes in LS-Dyna versions over the years can cause small problems. Let me kno...

Definitely seems like a time step problem. Tmin and Tmax = 0 might be causing your problems. Try setting Tmin to a small value like 1e-6 to limit real...

@john of course my mistake Looks like there’s a couple on YouTube. I’d focused on making it as simple as possible. If you know the drop tower hei...

Working with composite materials is not a trivial thing for somebody new to simulation. Here’s a list of resources that you can use to help get sta...

A bit out of my realm of expertise, but I'll try to help. Do you have *Control_MPP_Decomposition defined? Do you have the ability to run on SMP as a t...

Sounds like you are over-constraining your model. I assume you are just trying to apply load to the top of your element and constrain the bottom? You ...

Hmm yeah those plots aren’t what you should be getting. Did you try using the node set with the irigid settings I suggested?

Yeah this can be tricky. Did you try the other “irigid” options (0, 1, 2)? I usually don’t have this problem using 0 or 2. But if you keep having pr...

Best thing for what you want is to define a node set for all the dummy nodes, and use *Initial_velocity_set and reference that node set. You can also ...

@pulkin It seems like your shooting node is caused by your ball and plate penetrating during contact. Try increasing your SFS, SFM for your eroding co...

Without much experience in FEA, this could be difficult. What software do you have access to? Can this be a 2D analysis? How complex are the geometry ...

For hex meshing, you generally want to find the best way to work from a source face to a target face. In this case, it would be best to work from one ...