Derivation of Mixed 3D Solid Finite element for AceFEM, FEAP, ELFEN and ABAQUS

Problem description…Complete notebook
AceFEM AceGen input for AceFEM AceFEM element source code	FEAP AceGen input for FEAP FEAP element source code	ELFEN AceGen input for ELFEN ELFEN element source code	ABAQUS AceGen input for ABAQUS ABAQUS element source code
AceFEM example (Animation 200KB)	Feap input file	ELFEN input file	ABAQUS input file