San Le's Free Finite Element Analysis SLFFEA stands for San Le's Free Finite Element Analysis. SLFFEA is a package of scientific software and graphical user interfaces for use in finite element analysis. It is written in ANSI C by San Le and distributed under the terms of the GNU license.SLFFEA includes:9 of the basic finite element types: - 3-D 2 node beam - 3-D 8 node brick - 2-D 4 node plate - 2-D 4 node quad (plane stress and plane strain) - 3-D 4 node doubly curved shell (individual element defined by 4 or 8 nodes) - 3-D 4 node tetrahedron - 2-D 3 node triangle - 3-D 2 node truss - 3-D 6 node wedge non-linear large deformation element: - 3-D 8 node brick - Updated Lagrange formulation with Jaumann Stress Rate And 1 thermal element: - 3-D 8 node brick - It can handle thermal loads as well as orthotropy. 9 Graphical User Interfaces for each element type. - Example of brick GUI - Example of beam GUI SLFFEA is dedicated to Richard Stallman , Granddaddy of the Free Software Movement, Linus Torvalds, its prodigal son, and everyone on comp.os.linux.setup.