Abstract: This study was carried out to establish geometric model and finite element model of goat rumen, three dimensional reconstruction and finite element simulation model were used based on CT images of rumen of Xiangdong black goats. Firstly, the three dimensional reconstruction software (Mimics) was used to reconstruct the geometric model of rumen, and then Solidworks was used to convert the geometric model into IGES format and import it into the finite element mesh model in the finite element analysis software Hyperworks. Finally, Hyperworks and Ls_dyna combined simulation were used to analyze the mechanical properties of the in vitro reconstructed finite element model of rumen. The results indicated that in vitro reconstructed rumen model was similar to the rumen of living animals geometrically, and this model can clearly reflect the lumen structure of the rumen. After the mechanical analysis of the rumen model, the stress, strain and displacement nephograms of the rumen model were obtained. Geometric model and finite element model of visual rumen were established to reflect the appearance structure and biomechanical characteristics of rumen in natural state. These results indicated that the feasibility of three dimensional reconstruction and finite element method in goat rumen modeling were also verified, which built up a new method for rumen reconstruction and construction researching.

Key words: black goats, rumen model, three dimensional reconstruction, finite element analysis