Explicit Dynamics

LS-DYNA

Ansys HPC Platform Services (HPS). HPS can now be used with the Explicit Dynamics system as an alternative to the Remote Simulation Manager (RSM) for creating and managing jobs.

1D ALE Analysis Support. You can now run a 1D ALE analysis for a system that has 2D behavior. Line body properties can be set using the Section object, which then writes the *SECTION_ALE1D card to the input file.

2D Postprocessing by Material. You can now plot results based on an S-ALE material for a 2D analysis in the LS-DYNA system.

ALE Mesh Motion Object. The new ALE Mesh Motion object can be used to apply motion to an underlying mesh of bodies that have an S-ALE Domain Reference Frame.

Bushing Joint and General Joint Support. The LS-DYNA system now supports the use of Bushing Jointsand General Joints for modeling.

Custom Time Step Size Object. The new Custom Time Step Size object allows you to define a time-step curve using tabular data, specifying how the time-step size changes over time. This data can then be applied to step controls in the Analysis Settings.

Cylindrical Coordinate System for Displacement. You can now use a cylindrical coordinate system on a set of nodes to restrain the degrees of freedom (radial, tangential and axial).

D3dlrf Support. To assess if dynamic relaxation was successful, the LS-DYNA system now supports *DATABASE_BINARY_D3DRLF to postprocess the dynamic relaxation result file.

Deformable to Rigid Switch Type. The Switch Type in a Deformable to Rigid object, defines how the deformable to rigid switch is performed. It can be set to Manual, where the transformation takes place at the start of a simulation, or it can be Automatic, where the switch is triggered at a specified time during the calculation.

Editable Multiple RPMs Analysis Properties. A Multiple RPMs analysis can be changed from having read-only RPM properties to editable RPM properties.

Eroding Contact Program Controlled Values. When the contact Type is set to Eroding for a Contact Properties object, the Eroding Controls (Symmetry Plane Option, Erosion Interior Node Option and Solid Elements Treatment) are now set to 1 in the solver when Program Controlled is selected. This means faces with normal boundary constraints (such as segments of brick elements on a symmetry plane) are not included, storage is allocated so that eroding contact can occur, and solid element faces are included if they are on the boundary of the material subset.

Full Support of Python Commands. The Get Solve Commands option is now available as a Target Callback in the Python Code object for the LS-DYNA system, providing the same support as in Mechanical.

Importing Rigid Bodies. LS-DYNA rigid bodies can be imported through External Model. Once imported, they are defined as rigid bodies with full meshes in Mechanical.

Importing Contacts. LS-DYNA contacts that are imported through External Model are now scoped to bodies instead of element faces.

Internal Heat Generation Support for Thermal Workflows. The LS-DYNA system supports the Internal Heat Generation thermal loading condition and can be applied using the *LOAD_HEAT_GENERATION keyword.

Kelvin Support. If a Metric system is selected for the Solver Unit System under the Analysis Settings, you can set the Solver Temperature Units (For Metric Systems) to either Celsius (C) or Kelvin (K).

Keyword Snippet Improvements. When typing keywords in a Keyword Snippet (LS-DYNA) object, there is now a drop-down list suggests supported keywords based on your input. After the keyword has been entered, the Commands worksheet automatically populates with the keyword's parameters and default values. Additionally, you can now use the *DEFINE_CURVE keyword in a Keyword Snippet (LS-DYNA) object.

Linux Support. The LS-DYNA External Model can now be used on Linux operating systems.

Material Support. The material models *MAT_TABULATED_JOHNSON_COOK and *MAT_SPOTWELD are now supported in the LS-DYNA system.

Multibody Parts Support. You can now create multibody parts that consist of both rigid and flexible parts.

Pressure Result for ALE Tracer. You can now view the pressure (p) result generated by an ALE Tracer object.

Python Command Support. Get Solve Commands is now available as a Target Callback option in the Python Code object, meaning the LS-DYNA system now provides the same options as Mechanical.

RAND_I in User Defined Results. The electric current of a Randles circuit (RAND_I), is now available as a user defined result.

Radiation Support for Thermal Workflows. The LS-DYNA system supports the Radiation thermal loading condition and can be applied using the *BOUNDARY_RADIATION keyword.

Remote Point Scoping In the Velocity boundary condition, you can now scope to any pre-defined remote points that have a Rigid Behavior.

Results Scaling. In the Result ribbon, the Deformation Scale Factor is now set to 1.0 (True Scale) by default. This means the deformed shape displayed during post-processing is shown at its true physical scale, which corresponds exactly to the calculation without any exaggeration or reduction.

S-ALE Volume Filling for Shell Bodies. Shell bodies can be filled with a material by setting the Reference Frame to S-ALE Fill and assigning a material.

Trim Operations for Mesh Workflow. S-ALE Mesh Workflows now provide Trim options to shape the ALE mesh to be used in the simulation so that it closely mirrors the geometry.