Dady composite tetrahedral modeling element

A modeling element and method of modeling deformation in a body is shown that reduces volumetric locking. Further, a modeling element and method has been shown that reduces computational complexity. The number of nodes per element is reduced, while still maintaining a reduction in constraints by utilizing a composite element. The modeling element is more amenable to adaptive meshing due to use of first-order elements. The modeling element includes a good aspect ratio in the parent element and sub-elements to improve accuracy and computational efficiency. Incorporating constant pressure on the parent element provides a more ideal constraint ratio.