Dear biomch-l group,

Is anyone aware of any work that has been done in which a numerical model
of a joint was created for dynamic simulation, which utilized
three-dimensional geometry from surface meshes to derive the articulating
forces. I am trying to develop a model for some simplier articular
surfaces, such as in the spine (which are relatively flat), for studying
motion of the joint due to high acceleration or impact. The bones themselves
would be considered rigid, as a first approximation, and I would be
generating the equations of motion to describe the dynamic condition.

I am trying to use a method similar to that outlined in Shirazi-Adl
et. al. "A Finite Element Study of a Lumbar Motion Segment Subjected to
Pure Sagittal Plane Moments," J. Biomechanics, Vol. 19, No. 4,
pp.331-350, 1986, where points of contact on one body are checked against
target planes on the other body, but this seems to work well only for
quasi-static or slow motion conditions.

Has anyone had any success or know of someone that has had success with
this type of problem?

Any help would be appreciated and I will post a summary of replies.


Cliff Smith

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Cliff Smith
Research Faculty

Life College
1269 Barclay Circle
Marietta, GA 30060

Phone: (770) 426-2636
FAX: (770) 425-5496
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