so from literature similar crimps would generate 30-80 N of radial reaction force which im getting from my one quarter model so i must multiply the 40 n im getting by four to get the real values of the radial reaction force of the whole stent.. im extracting this by using an equation constraint...
Thanks a million! i have taken these into account but still no joy unfortunately. The only problem im really having now is the high reaction forces.is there anything else that could induce this?
this picture shows the folding in of the ends of the struts i have referenced as well as the high von mises stress values.https://files.engineering.com/getfile.aspx?folder=b8250ec1-42fb-422d-901c-bfcb669cd05a&file=frontviewofstentwithstressconc.PNG
Here is the newer design using fillets that i am trying to use https://files.engineering.com/getfile.aspx?folder=525bbd2d-5e53-4900-8c2f-fe640b1233d5&file=NoEQNconstraintandbcsaresymmbcs.inp
here is the 1st one where the only probelmes are folding in of parts of the stent, high regional von mises and noisy/high reaction forceshttps://files.engineering.com/getfile.aspx?folder=f03a7594-5fc4-482a-b642-833f8bca7cf9&file=thickness030newmesh.inp
"C:\Josh_Abaqus\RF-crimp-models\12-copy-shell\continuos-strut-design\NoEQNconstraintandbcsaresymmbcs.inp"
"C:\Josh_Abaqus\RF-crimp-models\12-copy-shell\continuos-strut-design\thickness030newmesh.inp"
I cant seem to attach the links so that you can open them . is there a way to do so on this?
[link file:///C:/Josh_Abaqus/RF-crimp-models/12-copy-shell/continuos-strut-design/NoEQNconstraintandbcsaresymmbcs.inp]Link[/url]
[link file:///C:/Josh_Abaqus/RF-crimp-models/12-copy-shell/continuos-strut-design/thickness030newmesh.inp]Link[/url]
The first link shows the newer design inp which i...
Thanks so much for your time and help. unfortunately this doesnt seem to solve my issue.
could you think of any other reasons? would sharing an inp help?
Hi, im using cyclic BCs to mimic symmetry and the equation constraint is only to map all nodes of the crimptool to one point for easy RF extraction. does that make sense?
Hi i'm modelling possible frames for anchorage in valve prostheses ( larger stents) made out of nitinol and im exploiting symmetry by modelling only a quarter of both the cylindrical crimptool and the stent. Howwever, when i do so by imposing radial BC's on a reference point mapped to the...
