NEi Nastran Finite Element Analysis (FEA) stress simulation software, along with Femap, reduces product development costs and shortens project turnaround. This program simulates real world structural, thermal, fluid flow and aero-elastic behavior of both simple and complex 3D product designs, including composites. Model generation and analysis time is reduced by combining powerful and easy-to-use finite element modelers with extremely fast solvers that have a proven record of accurate results.