Abstract
The in vitro mechanical test has been adopted to measure the mechanical property of organic tissue. A legitimate question arises about how plausible the result of in vitro test is for the material model of the in vivo tissue which is indispensable to finite element analysis of human body. So that, in vivo and non-invasive test is necessary, and we investigate a new measurement methodology of the three dimensional displacement field by means of the material test system combined with X-ray computed tomography to identify mechanical state of the in vivo tissue. Two voxel images of the initial and deformed states are obtained by the material test system. Representing displacement field by a mapping function from the initial voxel image to the deformed one, we pose an identification problem of the unknown variables in the mapping function. Use is made of the Genetic Algorithm to solve the problem. The proposed methodology is demonstrated through an example using chicken.
