Yes, if you try to run an analysis like forward dynamics it won't work without bone mass. I ran into this problem and ended up opening a different model that had mass and copying the values over to the model I was analyzing. If you are using software like SolidWorks to make the geometry files then y...

My lab is running tests on the effect of adding a pulley and ligaments to the fdl to double its force output. In the code, the max isometric force of the fdl is 274 N. When I run forward dynamics and plot the forces in the fdl and the added ligament, it shows a mean of 560 N in the fdl and 1045 N in...

My lab is researching Stage II Adult-Acquired Flatfoot Deformity, and I need a model that has the characteristic bone deformities. I was unable to find one that already has the condition. I will need to alter an existing model so that the bones are in the correct placement. However, the set of bones...

java.lang.RuntimeException: SimTK Exception thrown at ContactGeometry_TriangleMesh.cpp:472: Bad call to Simbody API method ContactGeometry::TriangleMesh::Impl::TriangleMesh::Impl(): Each edge must be shared by exactly two faces. (Required condition 'iter2 != backwardEdges.end()' was not met.) at org...

Update: I moved the mesh around a bit and got this error Bad call to Simbody API method ContactGeometry::TriangleMesh::Impl::TriangleMesh::Impl(): Each edge must be shared by exactly two faces. (Required condition 'iter2 != backwardEdges.end()' was not met.) After that I changed the ground ones to b...

I am trying to use forward dynamics to find the force generated on the bottom of the foot by the flexor digitorum. I created pairs of plate-like bodies to go under the foot, then used contact mesh and elastic foundation force to attach the bodies to each other and the foot or ground. I have a contro...