The CABLE element does not resist shear or torsion forces. This implies that the cross section of this element does not change as the entity deforms.

This element can be used to model cables, wires, ropes, etc. Only the Linear Elastic material model is supported.

The BEAM element resists all forms of deformation, which implies that the cross section can also deform with load. This can be visualized in HyperView while using this element.

Multiple cross sections are supported for the BEAM element:

This element can be used to model beams, springs, belts, rubber components etc. You may choose from either a Linear-Elastic or a Hyper-Elastic material.

Three Hyper Elastic materials are supported – Neo-Hookean Compressible, Mooney-Rivlin and Yeoh models. MotionView provides a set of recommended values for the model parameters. You may however, create new materials and enter your own parameters.

MotionView provides 3D visualization of the NLFE body based on the profile and cross section properties.

An NLFE body can now have a pre-loaded position in addition to the model position. The user can import these in a CSV format. Upon import, the model position will be shown in wireframe mode and the loaded position in solid.

With a combination Save command in MotionSolve and a Python script, it is now possible to save the configuration of the NLFE at the end of simulation into a CSV file. This csv file can be read into MV as preloaded configuration. An option is also available to visualize the unloaded and pre-loaded profile together.

In addition to the generic Cable and Beam modeling elements, MotionView also supports a small set of NLFE subsystems that are specific to the Auto industry. These subsystems may be accessed from the vertical toolbar to the left of the graphics window. The following subsystems are supported.

Stabilizer bar

Coil spring

Refer to NLFE Subsystems to learn more about using these subsystems in your model.

These subsystems are provided as examples to you to demonstrate how the built-in capabilities of MotionView may be used to create parametric subsystems that can contain NLFE elements.  You can build your own subsystems in a similar manner. Source code for the built-in NLFE subsystems will be provided in the installation.

MotionSolve supports a much larger set of NLFE modeling elements. You can use these in a MotionView model by using a Templex template. Native MotionView support is not available at this time.

Line Elements

BEAM9

(Gradient Deficient ANCF Beam Element)

BEAMC

(Beam Element with Circular Cross Section)

BEAM12

(Fully Parameterized ANCF Beam)

CABLE

(Cable Element)

Surface Elements

QUAD12

(Rectangular Thick Plate Element)

QUAD9

(Rectangular Thin Plate Element)

TRIA12

(Triangular Thick Plate Element)

TRIA9

(Triangular Thin Plate Element)

Solid Elements

HEXA12

(C1 Brick Solid Element)

HEXA3

(C0 Brick Solid Element)

PENTA12

(C1 Penta Solid Element)

PENTA3

(C0 Penta Solid Element)

TETRA12

(C1 Tetra Solid Element)

TETRA3

(C0 Tetra Solid Element)

Scalar and Bushing Elements

ABUSH

(Bushing Element)

LINE2

(Two nodes line spring element)

LINE3

(Three nodes line spring element)

LINE4

(Four nodes line spring element)

Mass Elements

CONGM

(Concentrated mass element connection)

CONPM

(Concentrated point mass)

Connector Elements

CONN0

(Connector element)

CONN1

(Connector element)

CONN2

(Connector element)

CONN3

(Connector element)

Linear Elastic Material Models

MAT1

(Continuum Mechanics Approach )

MAT1LS

(Linear Strain Material Model)

MAT6

(Elastic Line Approach)

Hyper-Elastic Material Models

MAT2

(Incompressible Neo-Hookean Material Model)

MAT3

(Compressible Neo-Hookean Material Model)

MAT4

(Mooney-Rivlin material model)

Anisotropic Material Model

MAT7

(Thin Plate Element Anisotropic Material Model)

MAT7ORT

(Thin Plate Element Orthotropic Material Model)

MAT9

(Anisotropic Material Model)

MAT9ORT

(Orthotropic Material Model)

MAT9TRA

(Transverse Isotropic Material Model)

Geometric Properties

PABUSH

(Bushing element properties)

PBEAM9

(Arbitrary Cross Section Beam element properties)

PBEAMA

(Arbitrary Cross Section Beam element properties)

PBEAMC

(Circular beam element properties)

PBEAML

(Property card of the ANCF beam elements)

PCABLE

(Cable element properties)

PLINE

(Line spring property)

PSHELL

(Plate elements properties)

PSOLID

(Solid elements properties)

Other Inputs

GRID

UNITS

The result H3D contains the NLFE elements in 3D form which can be visualized in HyperView.

Displacement, stress and strain contours can be visualized on the NLFE body. Other operations such as section cuts can also be applied.

Creating flexible bodies

User meshing is required to represent the component.

No user meshing required for creating NLFE sub-systems in MotionView.

An additional CMS analysis is required to generate a modal representation of the flexible component.

No analysis required to create an NLFE body. The NLFE Body can be created and modified directly in MotionView.

Line, shell and solid elements are supported.

This release introduces support for line elements only.

Connect to joints, forces etc. by defining interface nodes in CMS analysis.

All nodes can be used as interface nodes – no special handling is required.

Modeling flexibility in components

Only accurate in a linear deformation range, i.e. for small deformations;

Must capture enough modal information to represent physical deformation accurately

Fully non-linear formulation allows accurate solution for small and large deformations without any reduction analysis

Modeling flexibility in components

Only accurate up to a linear deformation range, i.e. for small deformations.

Must capture enough modal information to represent physical deformation accurately.

Fully non-linear formulation allows accurate solution for small and large deformations without any reduction analysis.

Modeling geometric non-linearity in flexible components

Cannot handle large deformations in general.

The BEAM and CABLE element allow you to model large deformations in your flexible components.

Modeling material non-linearity in flexible components

Does not support non-linear material models.

You can model your flexible components with hyper elastic as well as linear elastic materials.

Recover stresses and strains

Yes

Yes. MotionSolve writes out a 3D representation of the Beam and Cable elements to enable stress, strain and displacement visualizations in HyperView.