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Interfaces

Interfaces

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Interfaces

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Interfaces solve the contact and impact conditions between two parts of a model. Several interface types are available in RADIOSS and use different contact treatments. Each of these interfaces was developed for a specific application field. However, this application field is not the only selection criteria. Some limitations of the different algorithms used in each interface can also determine the choice.

Interface Types

Contact Treatment

 

Types

Application

Description

Kinematic Constraint

Tied

TYPE2

Change of mesh density (solid)

Tied connection between two Lagrangian materials.

Penalty Method

Slide / Void

TYPE3

Use of TYPE7 is recommended

Sliding with void opening and friction between two Lagrangian surfaces.

Symmetric computation (J. Hallquist algorithm).

Slide / Void

TYPE5

Use of TYPE7 is recommended

Sliding with void opening and friction between two Lagrangian surfaces.

Non-symmetric computations (master-slave algorithm).

Slide / Void

TYPE6

User-defined contacts

Impact contact between two rigid surfaces.

Slide / Void

TYPE7

Solid contact impact at all speeds

Multipurpose interface.

Can be used in place of TYPE3 or TYPE5. Node to Segment contact.

Slide

TYPE8

Stamping applications

Drawbead line.

Tied / Void

TYPE10

Special purpose interface

Tied contact + void opening (optional)

Slide / Void

TYPE11

For beams, bars or springs

Edge to Edge contact.

Slide / Void

TYPE14

For MADYMO to RADIOSS coupling.

Hyper-ellipsoid to nodes contact

Slide / Void

TYPE15

For MADYMO to RADIOSS coupling.

Hyper-ellipsoid to elements contact

Slide / Void

TYPE19

Solid contact impact at all speeds and for beams, bars or springs.

General contact interface.

Node to segment contact and Edge to Edge contact.

Equivalent to one interface TYPE7 + one interface TYPE11.

Slide / Void

TYPE20

This contact interface can replace interface TYPE3, TYPE5, TYPE7, TYPE11 or TYPE19

Single surface, surface to surface with optional Edge to Edge contact.

No time step condition with soft penalty.

Slide / Void

TYPE21

For stamping

Specific interface between a non-deformable master surface and a slave surface designed for stamping.

Slide / Void

TYPE23

For airbag

Soft penalty contact for airbag.

Slide / Void

TYPE24

This contact interface can replace interface TYPE3, TYPE5, TYPE7, or TYPE20.

General contact interface

Lagrange Multiplier Method

Tied

LAGMUL/TYPE2

Change of mesh density (solid)

Tied contact between master and slave nodes.

Slide / Void

LAGMUL/TYPE7

Solid contact impact at all speeds

Multi-usage impact interface between a master surface and a list of slaves nodes.

Slide / Void

LAGMUL/TYPE16

Meshes with 8-node or 16-node thick-shell or 20 bricks

Contact of impact between nodes and external surfaces.

Slide / Void

LAGMUL/TYPE17

Meshes with 8-node or 16-node thick-shell or 20 bricks

Contact of impact between external surface of two brick groups.

Automatic Penalty Lagrange

Slide / Void

LAGDT/TYPE7

Solid contact impact at all speeds

Same behavior as TYPE7 with constant minimum time step.

Hertz Formulation

Slide / Void

HERTZ/TYPE17

Meshes with 16-node thick-shell or 20 bricks.

Using Hertz contact theory to describe impact between external surface of two brick groups.

ALE

Tied

TYPE1

Fluid-structure interaction

Boundary between an ALE material and a Lagrangian material.

Slide / Void

TYPE9

Fluid-structure interaction

ALE/Lagrange, with void opening and free surface.

FLUID / FLUID

TYPE12

Fluid to fluid contact

Connects two fluid meshes with free, tied or periodic options.

ALE or EULER or LAG/ALE or EULER or LAG

Slide / Void

TYPE18

Fluid-structure interaction

Coupling between a Lagrangian material an ALE material.

See Also:

Implicit Features and Compatibility Information

Example 4 - Airbag

Example 22 - Ditching