Why NEi Explicit ?

High Nonlinear FEA Solver

NEi Explicit is a parallel explicit solver that is completely integrated within the NEi Nastran environment. NEi Explicit solves complex nonlinear material problems, large deformation contact problems, and very large multi million degree of freedom (DOF) static and quasi static models.

Plus, existing Nastran users can directly analyze a Nastran implicit model in the NEi Explicit solver without any changes to the analysis file. The NEi Explicit solver is well suited for these large types of nonlinear problems providing fast, robust performance because there are no matrices formed which means a small memory footprint for the model.

Advantages

NEi Explicit is a completely new explicit dynamics module from NEi Software. The explicit module provides solutions for highly nonlinear, contact/impact simulations. Solve larger, more nonlinear, contact problems faster.

The explicit dynamics algorithm forms no element stiffness matrices and has no global stiffness matrix. It has an extremely small memory footprint. This means you can solve problems with millions of degrees of freedom on a PC with a single processor. For even faster solutions, solve the problem in parallel using widely available dual and quad core processors. NEi Explicit provides scalable parallel performance across a wide spectrum of parallel processors.

NEi Explicit is fully integrated with the Nastran Editor. Existing NEi Nastran customers will find the transition to explicit dynamics completely intuitive. We offer a complete general purpose library of Nastran elements including:

Solid – CHEXA, CPENTA, CTETRA Shell/Membrane – CQUAD4, CQUADR, CTRIA3, CTRIAR Structural – CROD, CBEAM, CBAR, CELAS1 All element formulations are full, large deformation, large rotation formulations.

The contact surface definitions in NEi Explicit are fully consistent with the advanced contact options in our NEi Nastran offering. All contact formulations provide fully automatic contact tracking as we detect surface contact changes throughout the entire deformation process.

Material failure and element deletion options are available in the NEi Explicit module allowing sophisticated modeling of perforation and tearing of models under ballistic impact conditions.