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FIGURE 1. Simplification of the center of head movement as a joint in extinct Temnospondyli amphibian when biting. Elaborated from the original image (en.wikipedia.org/wiki/File:Jammerbergia_formops.jpg). Under license: CC BY-SA 3.0 (creativecommons.org/licenses/by-sa/3.0/).

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FIGURE 2. Studied test cases of different feeding movements when applying a force F=800 N in the direction of the red arrow (when the force is perpendicular at the view the red arrow is a red dot). Case 1A, 2A and 3A with a fixed boundary condition in the condyle without the web of beams. Case 1B, 2B and 3B with the web of beams in the condyle and a fixed boundary condition.

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FIGURE 3. Locations of the nine nodes at which the stresses were evaluated.

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FIGURE 4. Von Mises stress distribution in the skull for the Static Analysis in FEA in cases 1A, 2A, 3A, 1B, 2B and 3B.

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FIGURE 5. First 12 modes of the skull in case 1 (without web of beams in the model).

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FIGURE 6. First 12 modes of the skull in case 2 (with the web of beams in the model).

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FIGURE 7. Average error with respect to the number of deformation modes used.

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