A mixed-enhanced formulation for tetrahedral finite elements

This paper considers the solution of problems in three-dimensional solid me chanics using tetrahedral finite elements. A formulation based on a mixed-e nhanced treatment involving displacement, pressure and volume effects is pr esented. The displacement and pressure are used as nodal quantities while v olume effects and enhanced modes belong to individual elements. Both small and finite deformation problems are addressed and sample solutions are give n to illustrate the performance of the formulation. Copyright (C) 2000 John Wiley & Sons, Ltd.