I am trying to simulate the following (see image attached): A "box" made of a polymer, the box walls are around 2mm thick and the general dimensions of the box is around 200x200x50mm. The box has 2 nipples one on each side. I am trying to simulate a "burst pressure" test, in reality one of the...
Hi,
Not directly Ansys related, but I did run the analysis using Ansys.
I have an explicit simulation of a tank, weighs around 7.5 Kg with internal parts, falls from 1 meter. Since I never had a validation of such an experiment I am trying to understand if the numbers are right.
I get...
Hi,
I am using spaceclaim for quite a while now, Id like to say its a decent pre-processing tool but it seems lacking some basic functionality even an outdated tool like DM has.
Maybe its just me and I'm too old to learn a new CAD tool, but I assume such a tool will have the most basic CAD...
Hi,
When doing a non-linear analysis, I know that I should insert the true stress and strain curve to the material model (regular metal plasticity model using ANSYS for instance). The data I get from the material manufacturer (Young's modulus, yield point) is based on the engineering stress...
Hi,
I want to show results (deformation) with one (or all) parts transparent, I need to see what happens inside while still being able to see the whole assembly. Sectioning is not good and in wire frame I can barely see anything. Is there such an option in mechanical?
Hi,
I am running an explicit simulation in Ansys explicit, everything runs OK and the solve process finishes, but when I add a "standard earth gravity" BC to all bodies the analysis crashes at an early stage due to a large energy error.
Anyone knows why adding gravity causes this?
Thanks.
Hi,
I am modelling an assembly that includes a compression spring that sits between 2 parts - in real life when the assembly impacts the ground and disassembles the spring is floating around and is free to move on its own.
Is it possible to use a spring element to model such behavior (without...
Hi,
I started using spaceclaim after about 5 years using design modeler for geometry prep, and for the love of god, I cant understand how this software is claimed to be a CAD tool.
Ive used most of the main CAD tools out there (Solidworks, Catia, Inventor, Solid Edge, NX) and I've never...
Hi,
I am modelling crash and drop test for parts with a lot of very small radius features (<1mm). In order to get the run time to reasonable numbers I have to remove these radius features and most of the time I get sharp corners. When using implicit schemes I now this is a big no no, but in...
Hi,
I am trying to do a submodelling analysis, the submodel is a section of the original model that has a few contact pairs, and each time I do a new submodel analysis, I have to manually setup all the contacts from scratch. Not only this is a time consuming task, I am pretty sure there are...
Hi,
I remember from that I saw somewhere in the past that when I impose a duplicate BC to a node - Ansys WorkBench automatically removes the duplicate BC.
Ill try to explain:
If I use a symmetry BC on a symmetry plane, and some nodes in this plane are shared with a "fixed" BC, this means I...
Hi,
Ive been doing nonlinear analysis for the past 2 years, but with great concern regarding my constraints - I dont have a methodical approach for applying BCs.
Almost 100% of my work involves nonlinear geometry, materials and contacts, and most of the time I don't have prior knowledge of the...
Hi,
I understood that there is no option to use a point mass in ANSYS explicit STR (AUTODYN).
Since I am using this concept alot in explicit simulations (to replace solid bodies that are of no interest in regard of stresses to the simulation) I am looking for a workaround for this.
Can anyone...
Hi,
I am having some difficulty understanding the force reactions in a symmetry plane.
I am running a half symmetry model, fixed at one end, displacement BC on the other end - it is a two parts assembly - the model is cut in half in the middle and a symmetry BC is placed on the symmetry plane...
Hi,
I looked at the "whats new" presentations ANSYS released for release 17 and some "new feature" made me angry...
Effective February 2016 ansys will transform its mechanical packages to 3 major packages: Mechanical pro, premium and Enterprise.
I currently have a "structural" license and I...
Hi,
I am using ANSYS explicit STR for a drop test.
I am using a point mass to simulate the mass of the parts I am not meshing, but I couldnt see an option to prescribe the point mass an initial velocity in the software.
Is there an option to do so?
Instead I am currently using a MPC bonded...
Hi,
I have fitted a johnson cook material model for strain rate dependancy using a low strain rate tensile test.
I would like to use the johnson cook material model for impact and drop tests simulations (using explicit STR)
My problem is that I am not confident that the parameters extracted...
Hi,
I would like to disable the auto contact detection functionality on the startup of mechanical.
Sometimes it detects contacts that I dont want in the model, and since it is automatic when Mechanical starts, I forget to delete them.
Is it possible to disable the automatic creation of contacts...
Hi,
I have a process I want to simulate using ANSYS explicit.
I am using WB for the modeling.
I need to apply on a bosy in the model a certain pressure/force for a short period of time, and then a displacement on the same body in the same direction for a short period of time.
The problem is...
