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ContactModel

ContactModel​

This class represents a contact model.

Constructor​

ContactModel(label='')​

Creates a new instance of the ContactModel class.

  • label (string, optional): A string label for the contact model. Default is an empty string.

Attributes​

label​

A string label for the contact model.

Methods​

SetProperty(json_data)​

Set the properties of the contact model from a JSON object.

  • json_data (JSON object): A JSON object containing the properties to set.

SetProperty(prop_name, prop_value)​

Set a specific property of the contact model.

  • prop_name (string): The name of the property to set.
  • prop_value (float): The value to set for the property.

LinearSpring​

This class represents a linear spring.

Constructor​

LinearSpring()​

Creates a new instance of the LinearSpring class.

LinearSpring(stiffness, damping, rest_length, contact_radius)​

Creates a new instance of the LinearSpring class with specific parameters.

  • stiffness (float): The spring stiffness.
  • damping (float): The spring damping.
  • rest_length (float): The rest length of the spring.
  • contact_radius (float): The contact radius of the spring.

ParallelBond​

This class represents a parallel bond contact model.

Constructor​

ParallelBond()​

Creates a new instance of the ParallelBond class.

ParallelBond(kn, kt, gamma, t0)​

Creates a new instance of the ParallelBond class with specified parameters.

  • kn (float): Normal contact stiffness.
  • kt (float): Tangential contact stiffness.
  • gamma (float): Viscoelastic parameter.
  • t0 (float): Yield strength.

Inheritance​

ParallelBond inherits from ContactModel

ContactSolverSettings Class​

This class represents settings for the contact solver.

Attributes​

solver_type (SolverType)​

The type of contact solver to use. Default is SolverType.

gjk_use_erosion (bool)​

Whether to use erosion for the GJK contact solver.

gjk_erosion_ratio_initial (float)​

The initial erosion ratio for the GJK contact solver.

gjk_erosion_ratio_increment (float)​

The increment of erosion ratio for the GJK contact solver.

sdf_potential_type (int)​

The type of potential function to use for the SDF contact solver.

SolverType Enumeration​

This enumeration represents the type of contact solver.

SolverType.gjk: The GJK contact solver.​

SolverType.sdf: The SDF contact solver.​

SolverType.automatic: The automatic contact solver.​

ContactSolverFactory​

This class is responsible for creating instances of contact solvers based on settings.

Attributes​

settings (ContactSolverSettings): The settings for the contact solver.

Methods​

init(): Constructs a new instance of the ContactSolverFactory class with default settings.

init(factory: ContactSolverFactory): Constructs a new instance of the ContactSolverFactory class with settings copied from factory.

copy(): Copies the settings of the contact solver factory to a new instance of the ContactSolverFactory class.

DEMSolver​

This class represents a discrete element method (DEM) solver.

Constructor​

DEMSolver()​

Creates a new instance of the DEMSolver class.

Attributes​

timestep​

The timestep used for the simulation.

contact_solver_factory​

The contact solver factory used to create contact solvers for the simulation.

Enums​

CyclePoint​

An enumeration representing the different cycle points in the simulation.

  • pre: The pre-collision cycle point.
  • mid_0: The first mid-collision cycle point.
  • mid_1: The second mid-collision cycle point.
  • mid_2: The third mid-collision cycle point.
  • mid_3: The fourth mid-collision cycle point.
  • mid_4: The fifth mid-collision cycle point.
  • post: The post-collision cycle point.