NAGSIM_Gen.2D is a powerful, general- purpose nonlinear finite
element analysis (FEA) software program that quickly and accurately
simulates two dimensional engineering applications and hot, warm
or cold metal forming processes. It can simulate large plastic
deformation of the part as well as elastic deformation of the
NAGSIM_Gen.2D is advanced
and general-purpose extension of NAGFORM.2D program for simulation
of cold forging processes, with additional capabilities of
- Temperature analysis during deformation.
- Deformation analysis of compressible
- Choice of element types for deforming
Eliminate Trial &
Error in Forming
NAGSIM_Gen.2D allows you to
model the part forming in a computer before running it in the machine.
NAGSIM_Gen.2D provides accurate information to:
- Reduce die trials and costly mistakes.
- Improve tool life.
- Predict under fill, laps and cracks.
- Optimize preform shape.
- Predict temperature and density distribution.
- Determine mechanical properties of formed
- Determine influence of lubricants.
- Shorten print-to-part time
- Improve part quality
It complements 'NAGFORM'
and 'NagForge', knowledge-based
programs to create alternative forming sequences to form parts by
cold, warm or hot forging processes.
A Complete and Easy-to-Use
NAGSIM_Gen.2D provides a complete and easy-to-use solution from
creating a model of the forming operation to post-processing of
simulation results. NAGSIM_Gen.2D's graphical user interface is
tailored specially for simulating metal forming operations. Templates
for common forming operations are provided to reduce the effort
required to create the analysis file. NAGSIM_Gen.2D has its own
basic CAD module to create geometry of the workpiece and the tools.
The part geometry can also be imported in DXF format from other
CAD systems such as AutoCad, SolidEdge, SolidWorks etc. Geometry
can be stored in 'Part Library' for reuse.
Efficient and Robust
NAGSIM_Gen.2D uses an incremental finite element analysis solver,
based on thermo-visco plastic formulation, that is specially suited
to metal forming operations with large plastic deformation. Two
types of problems can be analyzed:
- Plane Strain deformation: Section of
- Axisymmetric deformation of round parts.
NAGSIM_Gen.2D has a database of materials commonly used in cold,
warm and hot forging. New materials can be easily created and stored
in database. The flow properties of the material are defined dependent
upon strain, strain rate and temperature. A subprogram is provided
to analyze compression test data for flow stress formulation.
Automatic Meshing and
NAGSIM_Gen.2D incorporates an automatic element mesher. After the
deformation process starts, the program automatically remeshes the
part when the old mesh gets excessively distorted or it is desired
to mesh certain areas with finer mesh. Different remeshing schemes
Elastic Analysis of
Elastic stress analysis of tools is performed for the whole deformation
cycle, providing a complete picture of tool stresses during forming.
Cold, Warm Forging and
NAGSIM_Gen.2D can simulate cold forming as well as warm and hot
forging with different temperatures of the part and the tools. Its
formulation includes dependence of the flow stress of the material
on temperature, strain and strain rate. Speed characteristics of
forging machines such as presses can be included in the analysis.
The movies below show (a) how the temperature rises in a cylinder
and the flat dies during cold upsetting and (b) temperature distribution
during hot forging of a side gear.
Temperatures Distribution in Upsetting
of a Cylinder
Temp. Distribution in Hot Forging
of a Side Gear
Forging of Compressible
NAGSIM_Gen.2D can analyze material models of incompressible metal
plasticity at room and elevated temperartures, and compressible
plasticity at ambient temperatures. For compressible materials,
changes in density due to forming is simulated. Movies below show
how the density changes (a) when a cylinder made from porous material
( 0.80 density) is upset between flat dies and (b) a porous part
is forged in contoured dies.
Density Distribution in Upsetting
of a Cylinder
Density Distribution in Forging
Element Types for Deforming
Linear QUAD element is used throughout NAGSIM_Gen.2D. For cold forging,
Triangular 'Mini' element based on U-P formulation can be selected
in place of QUAD element for the part.
Results and Information
NAGSIM_Gen.2D provides a complete insight into the forming process.
The results include: Material flow, stress distribution, strain
distribution, temperature distribution, density distribution, formation
of laps, load-displacement, tool stresses and contact between the
part and the tools. Animation of results presents a clear visual
of the forming operation. Tensile damage, Grain Flow and Tracing
deformation path of a point are included in the results.
Batch Processing of
NAGSIM_Gen.2D can batch process simulation jobs one after the other.
Also automatic simulation of entire forming sequence (multiple operations)
can be set up.