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I have an issue with contact. I have a screw thread surrounded by highly porous bone, and I am trying to model tightening of the screw. I have run my model with a fully bonded contact condition & the model solves without convergence issues. I now am trying to simulate friction with a friction...

Hi, I wondered if it is possible to perform direct mesh generation in workbench 12.0? I have some external software which creates meshes based on medical image data. It uses a standard solid45 brick element for each voxel in the image and writes an input file for Ansys classic. I can read it...

Hi all, I had been running ansys in batch mode on a parallel processing system. The license server for ansys died and the IT just killed all the licenses and restarted the server (without telling me!!) So my batch run has stopped. Is there anyway I can restart this run from where it was. It's...

Thanks!! Yeah, i've been reading a bit and that's my understanding too. From my analysis the results seem better with solid185 so I guess I'll stick to using that one. Thanks again!

hi thanks, I'm running my analysis in batch mode and need to get the sum during the run between load steps, so I couldn't use prrsol. But I have worked out how to do this. Thank you for your help!!

Hello, could anyone tell me the main difference between solid45 and solid185, and when you would choose one over the other. Would you get the same results no matter which element you used?? thanks!!

Is there a quick way to determine the total or sum of all the nodal reaction forces? I tried to use etable to list them all and then just ssum, but I couldn't work it with etable..... thanks.

Hi all, I have a structure, which is highly porous. I've attached an image to try to show the structure and mesh. I'm applying uniaxial compression by load displacement to only the top nodes (the bottom nodes are fully constrained). We want to look at localised stresses/strains with respect to...

Thanks Jalil, yes, in my output i have a note that plastic strain exceeds 5% and then begins bisection. The solution eventually converged, but I think that this cutcontrol will be very helpful!!! Thanks!! Mel

Hi, I'm modelling a structure using a bilinear material model. At yeild, the tangent modulus is set to 5% of initial modulus. I'm having problems with my solution converging. The force appears to converge, but not the displacement. I am guessing that this is because once my modulus is...

Thanks for the link, I'll have a look and see!! Thanks, Mel

Hello, I'm trying to model a material in ansys ls dyna. The material is essentially elastic plastic, but the yield strains are different in tension and compression. I was wondering if anyone could suggest a material model i could use. When modelling it in ansys classic the only model i could...

thank you. I found the problem. I had an error in defining the tension data of the material model. Thanks again.

Hello, I would like to model a material that has a higher yield strain in compression than in tension. The linear region has the same modulus for both tension and compression. Post yield I wish to use kinematic hardening. Could anyone tell me what is the best material model to use for this...

Could anyone please explain why I would get this error?? Cast Iron tension local NR algorithm does not converge Thanks in advance.

Hello, i'm trying to create a material model with differing yield strains in tension and compression. The material is essentially isotropic. I have used the cast iron material model for this (please let me know if there is a better option). I have defined it with the following code...

I have a structure which is being uniaxially compressed. I can get the nodal stress and strains, but wondered if there was a way I could find the apparent/equivalent stress and strain of the whole structure. I was told this would be the summed average of the nodal stress in the component(ie...

Hi cbrn. I followed your advice and constrained the nodes of the plate in the x & y directions. I now can get a solution, but the plate does not stay stuck to the top of the bone, instead the plate moves through the bone, so I don't think that contact is actually ever detected. I think that my...

Thank you to both of you for your responses. Yes it is a static analysis. I will try placing displacement constraints onto x & y. The bone is essentially a cube, but it has a complex geometric structure of plates and rods, so I won't can't use any sort of symmetry for the model (would be...

I'm having trouble with contact pairs, using ansys classic... I have a cube of bone, which i need to compress with a metal plated. I have constrained all the nodes on the bottom face of the bone and have created contact nodes on the elements on the top face of the bone, target elements on the...