Did all 3 of the models, it seems that there is not much difference in the stresses in the actual bone. There is a clear difference in the head and stem stress distribution, but not so much the bone.
I tried adding a volume calculation to the simulation with all Principal stresses for separate components. There is some difference, though not great in the stresses in the bone. Is there a way to display plots form different simulations runs in one graph?
What you can do is to export your results to .csv for instance and compare the stress results. Maybe our participants @emalkin and @pankajkumar979 want to add something here to help you out and tell what their results are.
Hi Anna,
Perhaps the exercise should have considered changing the stem material rather than the head, thus allowing to observe how the lower stiffness of UHMWPE would allow the transfer of some of the compressive load to the bone
Thanks!
For plotting the stresses from three different materials in a single graph can be done by downloading the results and then you can take either histogram(of single slice) or you can take a data on a particular line by using paraview.
Sorry for my late response and thanks @AnnaFless for tagging me in!
Well that is kind of a self made assembly. I took the human femur bone from GrabCAD as @AnnaFless mentioned. Then I took hip joint from one of our colleague project here: Hip Replacement Stress Analysis with FEA
I tried to combine them together and made another solid between them which acted as trabecular bone and bone marrow. That certainly took some time but finally a model was made near to what we had in paper
Thank you @ahmedhussain18 for your advice. Earlier @1318980 helped me out with the same. I already have a someones brain MRI. I’ll be working on the project “Transport of drug in the brain tissues”, if things goes well then someones brain is going to be on SimScale Cloud .
thanks for the detailed instruction! Just wondering for the body weight, once we get the error, can we keep on going? cuz at the end, I have got the same error message when I run the simulation. Can I just ignore and keep going?
Can you tell us what error you mean? Sharing the project with us would also be great. Just paste the link inside the comments and we’ll have a look at it!
Hello, I’m really enjoying this workshop, however, I’m a little confused about the part related to the force set up in that first session, the “design” of the SimScale app seems to be different from the tutorial. May someone help me?
Hi @jousefm. When I set up the force “Hip contact force - walking”, upload de CSV file and apply some errors occur:
i) there is a message saying that “FORCE > X > @currentlySelectedOneOfType” "should be equal to one of the allowed values and the same occurs for Y and Z directions.
ii) fx, fy and fz are not defined.
May you help me? (There is a printscreen in this message);
Thank you!
I have forwarded this issue to our engineers who will have a closer look at this issue - sorry for the lost productivity so far! I would encourage you to test the design with time independent loads for now and I will get back to you as soon as I know more.
.
