Mixed 3D Solid Finite Element
In this example we generate a three-dimensional finite element to analyze hyperelastic solid problems. The element has the following characteristics:
Isoparametric mapping from reference to actual frame
Global unknowns that are displacements of the nodes
Enhanced strain formulation to improve shear and volumetric locking
Minimization of Free Energy
Here we consider steady-state heat conduction on a three-dimensional domain. The solution of the same physical problem can be obtained via multiple methods, shown here as a minimum of the free energy of the system. The domain of the example is a cube filled with water and containing a constant heat source. The upper surface is isolated so that there is no heat flow over the boundary. On all other sides a constant temperature is maintained. The task is to calculate the
temperature distribution inside the cube.