News

What's New in Dytran 2021.1


News ID    PN266
Status:    Published
Published date:    06/18/2021
Updated:    06/23/2021
Created with Version:   Dytran (2021.1)
 

Description

 

Dytran 2021.1: Leading the way for Explicit Nonlinear FEA in Sheetmetal Applications

 

About Dytran 2021.1 Release:

Dytran, as part of Hexagon’s Design and Engineering Structures portfolio, is leading the way to provide best-in-class Finite Element Analysis (FEA) support for Hexagon’s manufacturing solutions.  This release both benefits Dytran customers doing Explicit FEA and those leveraging Hexagon’s FormingSuite, our primer package for sheet metal forming.

Dytran 2021.1 Highlights

Some of the Dytran 2021.1 highlights include the following:

  • Sheetmetal components: Dytran has made substantial improvements to support the breadth and depth of sheetmetal forming use cases with efforts to improve the Lagrangian solver both in terms of accuracy and performance. Sheetmetal components, produced by DIE stamping, are a classic example of thin metal components which are deformed substantially and quickly in manufacturing processes. 

    Explicit FEA is used in the simulation of sheetmetal stamping to provide deformation, stress and strain and other information needed for blank development, process design validation, and part quality.  The following image shows an example Sheetmetal Stamping Application.

  • Rigid motion limits introduce a new and convenient boundary condition to constrain the motion of rigid tools in sheetmetal forming applications. This feature allows for control over the velocity and displacement of slow moving or rigid components like the Blankholder avoiding unwanted numerical oscillations or simulation quality issues.

  • Stiffness based contact improves the accuracy of sheet metal forming processes by calculating the time and location of contact using the mass and material stiffness.  Previous contact algorithms used only mass based force penetration which presented problems when masses were incorrect.
  • Drawbead contact type:  Drawbeads are used to control the metal material flow into the die cavity during the drawing operation to produce an optimal stamped part with minimum material usage.  They prevent wrinkling in formed panels, reduce the blankholder force, and minimize the blank size needed to make a part. 

  • Barlat-89 Material Model: In this release, a new anisotropic plasticity material model for Lagrangian shell elements is provided. This model uses Barlat-89 yield model which was initially introduced by Barlat and Lian (1989). This new feature extends the range of application of sheet metal forming capability in Dytran, especially for aluminum sheets.
  • More Stamping Simulation in Less Time
     
  • Sheet metal forming contact performance improvements. Certain optimizations in the contact algorithm were made for sheet metal forming processes which may give up to 30% performance improvements in serial and even more when running distributed memory parallel.
     
  • Elective mass scaling. Similar to mass scaling, except that the accuracy of the lower modes is not significantly impacted which allows a use to increase time steps upwards by a factor of 10 or more, which will decrease the runtime in half or more.
     
  •  DMP for Dytran’s Lagrangian Solver.  Dytran has both Lagrangian and Eulerian solvers for explicit simulations. In this release, Distributed Memory Parallelism (DMP) capability has been added to the Lagrangian solver to speed up runtime across multiple CPUs in a HPC cluster environment.
     

 

Quick References

  • For support in leveraging the latest updates, please see SimCompanion or contact your support representative.