Viscoelastic material properties (Simcenter Samcef)

Viscoelastic materials laws depend on strain velocity. Their behaviors are modeled by serial or parallel combinations of simple elastic Hooke laws and damping laws.

You can define Simcenter Samcef viscoelastic properties in a Samcef Isotropic Structure, in a Samcef Orthotropic Structure, or in a Samcef Anistropic Structure material.

You define the elastic part of the material on the Mechanical page in the Manage Materials dialog box.

You define the damping options on the Viscoelasticity page in the Manage Materials dialog box.

The following tables provide information about the damping options you should use to define the Zener, Maxwell, and Kelvin viscoelastic laws supported by Simcenter Samcef. These laws and their equations are fully documented in the materials book of the Simcenter Samcef documentation, and the parameters described below refer to these equations.

Kelvin model

The Kelvin law models the behavior as stiffness and structural damping in parallel.

Viscoelastic property	Notes
Model	Select Kelvin (.MAT BEHAV "KELVIN").
Damping	Define the α damping coefficient of the law. You can define a temperature dependent value.For more information, see the VELA parameter of the Kelvin material in the Samcef materials book.

Maxwell model

The Maxwell law models the behavior as stiffness and structural damping in series.

Viscoelastic property	Notes
Model	Select Maxwell (.MAT BEHAV "MAXWELL").
Damping	Define the α damping coefficient of the law. You can define a temperature dependent value.For more information, see the VELA parameter of the Maxwell material in the Samcef materials book.

Zener model

The Zener law put in series a stiffness behavior and a Kelvin model.

Viscoelastic property	Notes
Model	Select Zener (.MAT BEHAV "ZENER").
Damping	Define the α damping coefficient of the law. You can define a temperature dependent value.For more information see the VELA parameter of the Zener material in the Samcef materials book.
2nd Hooke Coefficient	Define the γ Hooke coefficient of the Kelvin component. You can define a temperature dependent value.For more information see the VELG parameter of the Zener material in the Samcef materials book.

Note:

You can only use these properties in a Simcenter Samcef structural non-linear analysis.

For more information, see the material page.

Where do I find it?

Application	Pre/Post
Prerequisite	Simcenter Samcef as the selected solver
Command Finder	Manage Materials
Location in dialog box	Type→Isotropic or Orthotropic or Anisotropic→Create Material →Viscoelasticity page

Look up more details

Viscoelastic properties in the Material dialog box (Simcenter Samcef)

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Viscoelastic material properties (Simcenter Samcef), Simcenter 3D 2021.1 Series

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