Hi everyone.
I'm a new Nx Nastran user; past experience is with HyperWorks & Abaqus. I'm trying to run a simulation in Nx, but I can't seem to mesh the parts in the assembly at all (I'm already in .fem mode).
I can click on the tetmesh icon and get the create 3D tetra window to pop-up, but I'm...
Dear all.
Hi. I've been trying to run some topography optimization on a structural part. I'm applying a simple static (downward) force on a node and I set the volume as the objective to min, and have not been able run the analysis due to the error below:
ERROR # 148 FROM SUBROUTINE chkapx...
Hello everyone.
Simple question: what are incompatible mode elements and how are they used? I'd like to get a general idea of the difference between this type of elements to the others (reduced, fully-integrated etc) and why are they so powerful for bending analyses - without going into too...
Hi everyone.
I kind of have an awkward situation right now. Don't know if I actually have a situation or I should just loosen up, in fact.
I'm close to one senior engineer from a previous job; he was very helpful when I was working with him previously and we're both working our postgraduate...
Hi.
This is a simple question about defining material properties of a plastic I guess.
I have a value for tensile & compression strength and have to include this in my model, alongside the modulus & poisson ratio. I use *Elastic for modulus & poisson, but I don't know which card to use for...
Hi everyone.
I work for an MNC based in the US. The regional office where I work for (other side of the world) was opened two years ago. We have a regional manager stationed here who was supposed to set-up the office and find a local employee who can act as technical manager to replace him. We...
I'm trying to model a rubber mold in 3d and has to repair the part for meshing. 3D is a new thing for me so I have to make several tries to see what works. How do I undo a repair operation that has been done? I tried selecting the 'x'on the prompt area but that does not undo the change I just...
Hi everyone..
I just got back from a meeting and there's something discussed in the meeting that I can't resolve. It should be simple but...
Anyway, a colleague was presenting the difference between running a simple cantilever beam deflection using a 2D planar (simplified) and using 3D model...
Hi everyone.
My group is trying to model cyclic loading of a rubber mount installed between two steel plates. Due to time constraint, we want to extablish a ref model that will run in the shortest time possible (we have several runs to go through this week). If we run in standard, the job does...
Hi everyone.
I was told that Bit Defend is the current champion. Is this true? Currently my workplace uses TrendMicro which has never been able to clean infected files at all. All it does is pop up message windows saying such and such malicious exe file is in the midst, and the most it can do...
Hi forum members.
Has anyone here used *Surface behavior, penalty? I have an axial fitting simulation of shaft seal that is held stationary. I usually use *Contact pair to define contact between the deformable seal and analytical rigid shaft. The problem with this one is the primary lip gets...
Hi everyone.
Does anyone here has a lot of experience in setting up a 3d symmetric model from the results of a 2d model? I'm trying to use the *symmetric model generation and *symmetric results transfer. What I have is a rubber boot 2d axisymm model that I have applied internal pressure to. I...
Hi everyone.
I'm trying to simulate an axisymmetric model of a brake seal being installed in a gland, and apply pressure afterwards. My problem is of rigid body motion. Occurs when I move the rigid surfaces to close in on the seal. To overcome this, I created a BC on the seal to hold it until...
Hello forum members.
I'm trying to apply centrifugal load on a piston seal using a fortran program. The job runs nicely except that the seal moves when load is applied (it's not supposed to). I have created a rigid surface to which the bottom surface of the seal is tied to, but upon re-running...
Dear forum members,
I'd appreciate if anyone can shed some light on rubber modelling in abq CAE. I'm modelling an elastomer gasket using *Hyperelastic, Marlow. There are several sets of test data which I have tried to include in my inp deck, namely uniaxial, biaxial, planar and volumetric test...
Dear forum members,
I would appreciate it very much if someone can tell me more about running abq explicit in double precision executable.
I am running a demolding simulation and I come across this message in the sta file:
***WARNING: THE ANALYSIS MAY NEED A LARGE NUMBER OF INCREMENTS (MORE...
Hi.
I would like to ask for help from anyone who has experience troubleshooting abaqus. I was working in CAE (module: part) and editing my sketches when suddenly abaqus shut down due to some error. I tried re-opening my cae file but I received this error msg instead:
#: Executing...
Dear forum members.
I would really appreciate any suggestions on overcoming a contact problem. I'm modelling the installation of a seal between a shaft and a cover. Shaft and cover are modelled as rigids and installation is done in 2 steps (step-1: install shaft, step-2: install cover.
My...
Dear forum members,
I'm trying to export some parts - an assembly - into IGES, to use in Abaqus CAE. I have selected the parts I wish to export, and the log files tell me that the IGES file has been successfully created. Yet when I import the IGES sketch into Abaqus, only 1 part is there. This...
Hi.
I've been trying to model a rubber seal undergoing thermal expansion between 2 rigids and a steel tube, from room temperature to 150C using Standard.
Model is axisymmetric and I'm using Marlow mat model. I ran one analysis with Al tube before and it ran well. For this analysis, all I did...
