No axi symmetric for a disc is a like a pizza slice shaped segment. But like Rb1957 says best to keep it simple and do a full analysis. Also I would look into why the contacts are not working , this is a simple contact problem and there should not be any issues with it.
We use equivalent plastic strains for rupture in our dynamic analysis, this is backed up by our experimental results database. In high speed impact models we have seen that strain rate effects affect the point at which rupture occurs so its best to use plastic strain as the failure criteria. Not...
You have to use consistent units in load curves, so that. This case if you use seconds as your time unit, 1/s would be your strain rate units. There are a few cases where units are hard coded but almost always you just follow a consistent unit system.
You need to provide more info on the solver you are using and about your problem.
From what I understand you are using 2D Eulerian elements to model a beam ?
Not sure about abaqus, but I do this in LS-Dyna by applying a time varying Load on the shell segments. that way they will expand at a rate your load varies.
Also see if you can use the control volume approach where your cylinder can be "inflated" by applying a constant pressure. You can...
Pressure is better as it distributes the load on several nodes/elements, with point loads you might get a large unrealistic stress concentration around the area of the point load.
I am trying to simulate the inflation of an inflatable structure for one of our products. Currently I am using an explicit solver for it (explicit FEA+CFD) . The problem is the inflation time is 4 seconds. The analysis is highly non-linear with surface to surface contacts with outside bodies and...
The effective stress output is the Von-mises stress. The stresses/strains output in fringe components and ASCII databases will be true stresses/strains unless stated otherwise (I am not sure if there is an option to output engineering stress/strains instead).
In some material models you have...
Sorry about that, rechecked the nodout output and it only outputs deflections.
Can you not make a cross section at locations where you want the moment info and use secforc database to get them ? Or you can ask in the LSDyna yahoo user group (http://tech.groups.yahoo.com/group/LS-DYNA/) ...
I found a patent by Ford (www.google.com/patents/US20070179764
) for a method that is quite similar to ours. Our simulation has different steps and some improvements and is being used for an aerospace application.
The problem is the cheif engineer's office wants the method patented and I...
I would think differences arise from more than just element type. Mesh quality, boundary conditions, Material models, solve type among others
I believe solidworks simulation express only does linear analysis ?
Hi,
I have been asked by my manager to look into patenting the methods/techniques we use for a dynamic simulation of the deployment of our product. I am wondering if this is patentable at all. Any input regarding this is highly appreciated.
The closest patent to our situation is this...
EQ.0 means equal to 0 , in your example if you set that field to 0 then it will enable GISSMO damage model.
LT.0 means less than 0, so you set the field to a negative integer the corresponding damage model will be activated. Check the lsdyna manual for which model corresponds to which integer.
