So, to wrap this thread up, the problem was Mechanical doesn't update material changes without exiting and reading the upstream data again whenever the material is changed. This caused me to have the wrong material data in engineering data than what the model had used, so when I ran another...
Thanks for the information on how to stop default material assigning!
I believe you are correct in this, a different material setting was used. I discovered that whenever I change material settings in engineering data it doesn't refresh if Mechanical is open. I had Mechanical open while...
Ran the simulation a couple more times trying different things. Ran it with a .005" gap between the armor layers, still resulted in errors. I read the manual on modeling composites in ANSYS and my values are correctly inputted according to the manual. Ran another one with only UHMWPE and this is...
Thanks for the reply! That paper you posted is one of the multiples I used to construct this around. Although I'm not sure what you mean by "The faces are glued together using add frozen option in geometric modelling of the alumina plate and UHMWPE plate to maintain mesh continuity and to...
Trying to run a simulation in explicit dynamics and everything was going fine, ran a nice simulation of a ceramic armor plate of Alumina and UHMWPE. Then I discovered that I entered a value into the Alumina incorrectly which is why the entire ceramic was failing at impact. Fixed that, ran it...
Getting pretty frustrated trying to figure out how in the world to input material data for fiber composite materials, specifically UHMWPE, without ANSYS having a stroke saying "the Hydro strength can only be used with Hydro failure" or the EOS and strengths are incompatible. Attached is a copy...
I don't think there is a way to do that in AutoDyn, I looked everywhere, including the worthless manual. The only things I have found is:
The simulation (4.5 hours)I posted had the density cutoff option as "density limited" instead of "delete node". Upon changing to delete node, estimated...
Thanks for the reply! But is it accurate for the bullet to convert to SPH particles in this situation? It is expected the bullet core will erode and create a path forward for the remainder of the bullet, but the two concerns I have about these particles are: 1) they are influencing the...
I am trying to analysis a bullet vs armor situation in AutoDyn and it comes out mostly correct although the bullet doesn't seem to be realistically simulated and I am concerned about it. Attached is the .MP4 file of the animation generated from the results. Notice how the entire bullet breaks...
