FEAP is designed to allow users to modify the code for their one purposes. If at all possible, users should always use the user hooks provided in the user directory. These allow user to make custom elements, material models, new FEAP commands, et cetera. The programmers manual provides an introduction to programming in FEAP.
Programmers Manual
The programmers manual can be found on the FEAP project site http://projects.ce.berkeley.edu/feap.
User Elements
User Interface Elements
User Memory Allocation
User Block Generation
User Body Forces
User Materials
User Debugging File Outputs
User Transient Algorithms
User Export of Tangent and Residual for Code Coupling
Set User Data for Element Plotting
Assembling User Contributions to the Tangent and RHS
User Functions
Global User Parameters
Set User Boundary Codes
User Displacement Imports
User Utility for Sparse Arrays
User Macro Commands
User Mesh Manipulation Commands
User Mesh Generation Commands
User Plotting Commands
User Mass Allocation
User Problem Inputs
Setting User Additions to the Profile
User Proportional Load
User Rotational Updates
Custom User Banner Messages
User Solvers