Libra Finite Element Analysis Program

Libra is an efficient, general-purpose, finite element method program applicable to static, dynamic and heat transfer analyses of structural systems. The program contains a comprehensive library, and over twenty solution algoritms taking advantage of both Gaussian and iterative solvers. In addition the program has a fully integrated editor for model generation, and comprehensive post-processing and plotting capabilities. Libra can execute problems of over 250,000 degrees of freedom on computers configured with 256 MB of available memory and 20 GB of hard drive. Libra 10 is now 64-bit compatible.

Program Solution Procedures

• Linear and nonlinear static analyses
• Analysis of axisymmetric structures with nonsymmetric loads
• Linear buckling analysis
• Modal analysis by Lanzcos, subspace, and vector iteration methods
• Dynamic integration using modal coordinates
• Linear and nonlinear direct dynamic integration
• Modal response solution
• General sub-sectioning capabilities
• Steady-state and transient heat transfer analyses

Libra Element Library

• Strait and curved beam elements
• Triangular and quad plate and shell elements
• Doubly curved, 8-node shell element
• Conic and curved axisymmetric shell elements
• Standard and hierarchical 2D and 3D elements
• Plane stress, plate, and shell composite elements