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Key Features of NEi Nastran
- NEi Nastran Deck Editor GUI
- Integrated Vibration Fatigue; Comprehensive Fatigue (V10)
- Linear Surface Contact
- True 3D Nonlinear Surface Contact
- Automated Surface Contact Generation (ASCG™)
- Automated Impact Analysis (AIA™)
- Modal Database Management and Modal Filtering
- Integrated Modal Assurance Criteria (MAC)
- Interpolation of Results Data from Other Codes to Nastran Models
- Advanced 3D Layered Composite Analysis
- Progressive Ply Failure Analysis (PPFA™)
- Advanced Failure Criteria for Composites
- Nonlinear Tension-Only Shell and Cable Elements
- Outstanding Live Technical Support
1. NEi Nastran Deck Editor GUI
- Fully integrated and customizable Nastran Editor controls program operation and provides results summary data through an easy to use GUI
- Bulk data files can be modified in an interactive environment
- Special real time controls allow changing solution parameters while running
- Post processing and results query
- Tabbed windows to give immediate access to all input and output files
- Field markers make manual editing simple and increase productivity dramatically
- Complete online documentation and context-sensitive help that actually helps
- Permits batch queuing of jobs for sensitivity and configuration trade studies
- Real time 2D x-y plotting and 3D deformed shape and contour plotting with optional MS Excel Comma Separated Variable (.CSV) file output
 
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2. Integrated Vibration Fatigue; Comprehensive Fatigue (V10)
- No third party products or costly modules for fatigue and vibration fatigue
- Fatigue life and fatigue damage due to random vibration calculated based on Steinberg’s three banded technique
- Allows for quick assessment and predictability of outcome of standard industry vibrational testing
- Greatly improves upon predicting structural failure due to vibration based on RMS (root mean square) outputs and response PSDs
- Fatigue capability typically found in costly specialized fatigue packages in core NEi Nastran
- Stress life (high cycle) and strain life (low cycle) methods included
- Fatigue life and fatigue damage output from uniaxial and complex
multiaxial loadings
- Rainflow counting for variable amplitude loadings
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3. Linear Surface Contact
 True 3D surface contact with closing and opening of gaps in core Nastran linear statics (SOL 101)- Iterative strategy saves hours of nonlinear run time
- Works with Automatic Surface Contact Generation (ASCG)
- Makes linear gap elements obsolete
- Ideal for large contact models that are initially in contact
- Fast trade studies for bearing assemblies analyzed in minutes
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4. True 3D Nonlinear Surface Contact
 Free edges contacting surfaces now identified automatically- Edge to face welding carried out automatically
- No element congruence required
- Offsets and gaps between edges and faces are permissible
- Rapid meshing of complex shell structures now possible
- Ideal for large thin shell fabrications such as ship, aircraft, and automotive structures
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5. Automated Surface Contact Generation (ASCG™)
 Solver will search for element faces in contact and automatically setup the contact between discontinuous bodies- Can be used for automatically welding parts together or automatically defining nonlinear surface contact in complex regions
- No geometry is required
- Legacy Nastran models supported — ability to upgrade from legacy GAPs to surface contact with a single Case Control Command
- Ability to weld parts together through a small gap automatically, which prevents manual definition of multiple master-slave regions with an offset
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6. Automated Impact Analysis (AIA™)
- Routine drop testing so there’s no manual configuration with every step
- Arbitrary object and target shapes
- Automatic object repositioning
- Uses Automatic Surface Contact Generation (ASCG) to automatically define contact regions
- Automatic natural frequency calculations of object and target allows optimum calculations of time steps and impact duration
 Nonlinear Transient Analysis – all data calculations and data transfer carried out- Automatic real-time output of X-Y data at impact points during analysis
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7. Modal Database Management and Modal Filtering
- Modal Base filtering option based on modal effective mass
- Modal Data save and re-use option
- Very big savings in CPU time possible with all Modal based response method avoiding re-calculation of modal data
- Simple interface: best usability
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8. Integrated Modal Assurance Criteria (MAC)
 Correlation carried out by NEi Nastran in a normal modes analysis- No 3rd party software required
- External or test data can be in CSV, DMIG or MDB forma
- Non-MDB (Modal Database) data will be automatically converted to MDB for re-use
- Automatic mapping of test to model grid positions
 Interpolation of test eigenvalue shape to model- MAC and ORTHO-MODE correlation supported
- Text output in the Model Results Output File
- Graphical support is included in the NEi Nastran Editor
- Future developments include FRF correlation
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9. Interpolation of Results Data from Other Codes to Nastran Models
- 2D or 3D interpolation of input, temperature, displacements, forces, moments, and pressure
- Allows load transfer across different models / disciplines:
– Temperatures —> Thermal – mechanical coupling
– Forces / Moments —> EMAG – mechanical coupling
– Pressures —> CFD – FEM coupling
– Displacements —> FEM – CFD coupling
- Accurate and user-controllable 2D / 3D polynomial interpolation through least-squares approach
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10. Advanced 3D Layered Composite Analysis
- Composite layups can be directly applied to solid elements
- CHEXA and CPENTA support layered material definitions using the PCOMP Bulk Data entry
- Overcomes the limitations of Classical Laminate Theory, which include the failure to take into account local design details such as jointed regions and T connections
- Transverse shear and the through thickness normal stresses are included as a direct result of the triaxial stress state in the fully 3D orthotropic material
- Mapping of 3D ply layup from existing 2D PCOMP data
- Conversion of MAT8 (2D orthotropic) to new MAT12 (3D orthotropic)
 
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11. Progressive Ply Failure Analysis (PPFA™)
- Proper representation of reduced stiffness of failing composite parts
- Simulation of incomplete failure
- More accurate damage assessment
- Enables substantially more optimized composite designs when designing to ultimate load, by considering Last Ply Failure as well as First Ply Failure
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12. Advanced Failure Criteria for Composites
 LaRC02 Set of Criteria- Developed by NASA
- First-ply-failure
- Physically based
- Hashin, Puck approach
- No additional material properties required compared to Tsai-Wu
- Failure mode taken into account
- Extensive validation (WWFE)
 
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13. Nonlinear Tension-Only Shell and Cable Elements
- Nonlinear Tension-Only Shell Element
– Tension only membrane reverts to a shear panel in compression
– Designed for analyzing semi-monocoque aircraft structures
– Controllable compression stiffness scale factor
– Currently used by Cessna Aircraft for production design work
  
- Nonlinear Tension-Only Cable Elements
– Allows initial slack or preload
– Ultimate tensile stress can be specified above which the cable fails
– Supports temperature dependent material properties
– Supported in all solutions
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14. Outstanding Live Technical Support
- Web Based Support includes unlimited access to the NEi Nastran Customer Knowledge Base
- Email Support is a 24 hour turnaround service
- Telephone Support is available 7AM - 5PM PST
- Mentoring Support provides advice to customers on finite analysis techniques, analysis strategy, meshing, model debugging, and more
- Maintenance Updates include documentation corrections and bug fixes and are provided free of charge
- Version Updates are new releases with significant enhancements and additional functionality
- Consulting Services can be provided at an additional charge, and include complete analysis of your projects from start to finish
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Brochures
 Key Features of NEi Nastran
Datasheets
AIA and Drop Test
Automated Contact Generation
Linear Contact
Related Topics
[10 Reasons to Consider NEi Nastran over Other Nastran Versions]
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