Utilities (3d)

rollover.three_d.utils.contact

Module to setup the rail-wheel contact

rollover.three_d.utils.contact.setup(the_model, contact_stiffness=1000000.0, friction_coefficient=None, elastic_slip_fraction=0.005)

Add a contact property and a surface-to-surface contact in the_model according to the given settings.

Parameters

• the_model (Model object (Abaqus)) – The model to which the contact settings should be applied

• contact_stiffness (float) – The stiffness used in the normal penalty formulation.

• friction_coefficient (float) – The friction coefficient for the tangential behavior. If none, no tangential behavior will be defined and the contact will be frictionless .

• elastic_slip_fraction (float) – The allowed elastic tangential slip. This will adjust the penalty stiffness for the tangential contact.

Returns

None

Return type

None

rollover.three_d.utils.fil_output

This module is used to control the output to the Abaqus result (.fil) file

Note

Uses direct editing of input and should be called after all cae options have been set.

rollover.three_d.utils.fil_output.add(the_model, num_cycles)

Add .fil output to input file for each rolling step. For the first, add node coordinates and displacements. For the remaining, add only displacements. If rail reference point is used, add node coord and displacements If rail substructure is used, the instance set names change…

Parameters

• the_model (Model object (Abaqus)) – The model to which the output is to be added

• num_cycles (int) – Number of rollover cycles to simulate

rollover.three_d.utils.fil_output.add_to_step(kwb, varstr, step_name, rail_rp=None, use_substr=False)

Add output specified to given step.

Parameters

• kwb (KeywordBlock object (Abaqus)) – The keyword block that can be used to edit input file directly.

• varstr (str) – The string specifying which variables to add to output

• step_name (str) – The name of the step to which output should be added/modified

• rail_rp (str) – The name of the rail reference point set

• use_substr (bool) – Is a rail substructure used?

rollover.three_d.utils.fil_output.get_node_file_output_str(nset, varstr, frequency=99999999)

Get the string to add to the input file.

Parameters

• nset (str) – Name of node set from which output should be output

• varstr (str) – comma separated list of variables to output

• frequency (int) – How often to write output (increments)

Returns

The string to add

Return type

str

rollover.three_d.utils.loading

rollover.three_d.utils.mesh_tools

rollover.three_d.utils.odb_output

This module is used to control the output to the Abaqus result (.fil) file

Note

Uses direct editing of input and should be called after all cae options have been set.

rollover.three_d.utils.odb_output.add(the_model, field_output_requests, num_cycles)

Add the user specified field output requests. Default outputs are deleted.

Parameters

• the_model (Model object (Abaqus)) – The model to which the output requests will be added

• field_output_requests (dict) –

  A dictionary with field output request specifications. Each field should be a dictionary containing the following fields:

  • set: Which set the output applies

    to. Refers to sets in the rail instance, except special sets:

    • ’FULL_MODEL’: The entire model

    • ’WHEEL_RP’: Wheel ctrl point

  • var: List of variables to save,

    e.g. (‘U’, ‘S’)

  • freq: How often to output during step. I.e. every incr=1. Set to -1 for only last increment.

  • cycle: How often to output cycles, i.e. 1 implies every cycle, 10 implies every 10th cycle, etc.

Returns

None

Return type

None

rollover.three_d.utils.sketch_tools

Tools to work with sketches

rollover.three_d.utils.sketch_tools.import_sketch(the_model, sketch_profile, name='profile')

Import the sketch sketch_profile and add it to the_model.

Parameters

• the_model (Model (Abaqus object)) – The model to which the sketch will be added

• sketch_profile (str) – Path to an Abaqus sketch profile saved as .sat file (acis)

• name (str) – Name of the created sketch, defaults to ‘profile’

Returns

The added sketch

Return type

ConstrainedSketch (Abaqus object)

rollover.three_d.utils.symmetric_mesh_module