When examining the results in postview, I notice the femoral component is deforming as expected, but the tibial cartilage exhibits no deformation _at all_. The model runs in a reasonable amount of time, but always ends with error termination as negative jacobians are detected for time points. My boundary conditions no movement at all on the lower surface of the tibial cartilage (where it would contact bone) and z only movement on the opposite femoral cartilage side (again, where it wound contact bone.) On the articulating surfaces, I have an sliding elastic contact interface with a penalty of 1000, and frictional coefficient of 0.02. Both the femoral and tibial components are treated this way. The present paper deals with a new method for visualization of lubricating lm with simultaneous measurements of the friction coe cient. The cartilage is modeled as neo-hookean with a density of 1100kg/m^3, 3.3MPa stiffness, and 0.4 poissons. The right functioning of natural synovial joints ensures well lubricated contact surfaces with a very low friction coefficient and wear of cartilage tissue. As I am examining a steady-state loading plateau, I am neglecting viscoelasticity or any fluid flow, purely matrix stiffness. I have designed idealized geometry of the medial size of the femoral cartilage above the tibial cartilage. I am in the process of modeling the medial half of the knee for a cartilage contact problem. This release contains many improvements, such as better performance of the reactive viscoelastic framework, faster startup of FSI models, box constraints for constrained levmar optimization, new rendering features, and more. FEBio Studio 1.8 has been released! It comes with FEBio 3.7.
#CARTILAGE CONTACT VISUALIZATION POSTVIEW COLIN SMITH SOFTWARE#
The FEBio software downloads and knowledgebase can be found here. This will allow you to stay up to date on recent activity on the forum. You can subscribe to forums by pressing the "Subscribe" button at the top of the forum. Histochemical visualization of the cartilage hyaladherins using a biotinylated hyaluronan oligosaccharide bioaffinity probe. Moderators are here to assist with explaining novel features, addressing bug reports and reviewing feature requests, but the effectiveness of the forum depends critically on the participation of experienced users who can assist novices or share ideas and models that explore challenging problems. A broad level of participation is encouraged, to create a vibrant community that helps improve the quality and usefulness of these open-source/free software products. Forum participants are encouraged to post questions, as well as answer posts from others. This forum serves the community of FEBio and FEBio Studio users and developers.
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