Material support for laminates in the Abaqus environment

The Abaqus environment provides support for:

• Progressive damage failure in 2D and 3D laminates in structural analyses using the User-defined Material Subroutine

• 2D shell laminates in Abaqus Thermal, Coupled Thermal-Structural, and Dynamic Coupled Thermal-Structural analyses

Progressive damage failure in laminates using the User-defined Material Subroutine

When working in the Abaqus environment, you can use the following models.

Supported model	Material type	Type of material model
Sudden Degradation	Orthotropic	Progressive failure
Woven Fibers (Hochard’s model)	Orthotropic	Progressive failure
Damage model based on Multicontinuum Theory (MTC)Note: The model takes into account the material properties of the matrix (isotropic material) and fiber material (orthotropic material), in addition to the volume fraction and other user-specified damage parameters.	Unidirectional-type ply	Damage model

General user-defined damage models are also supported by adding failure theories to isotropic and orthotropic materials in an .udmpx file (progressive_damage_materials.udmpx). The Abaqus translator processes the data through an internal material xml parser and writes the material constants for use in UMAT subroutines. A Solution-Dependent State variable is supported in the Abaqus Structural Output Request modeling object.

For more information, see Simcenter Nastran user-defined material models and User-defined progressive failure analysis (Abaqus).

Related Abaqus keywords: *USER MATERIAL, *DEPVAR

Shell laminates in Abaqus Thermal and Coupled Thermal-Structural analyses

When Abaqus Thermal, Coupled Thermal-Structural, or Dynamic Coupled Thermal-Structural is the selected solver, you can define a composite shell for 2D shell elements listed in the table using the Basic Laminate or Laminate Physical Property table.

For the analysis type	Supported elements
Thermal	DS3SD4DS6****DS8
Coupled Thermal-Structural	S3TS3RTS4T****S4RT
Dynamic Coupled Thermal-Structural	S3RT****S4RT

You can define a laminated (layered) shell made of one or more materials. You specify the thickness, the number of integration points, the material, and the orientation for each layer of the shell. The order in which you specify the layers determines the order of the laminated shell layers with respect to the positive direction of the shell normal.

Related Abaqus keyword: *SHELL SECTION, COMPOSITE

Where do I find it?

Application	Pre/Post
Prerequisites	A FEM file as the work part and the displayed partAbaqus as the specified solver
Command Finder	Physical Properties
Menu	Physical Property Table Manager→Basic Laminate or Laminate Physical Property table
Location in dialog box	Type→Basic Laminate and then click Create.Type→Laminate and then click Create.

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Material support for laminates in the Abaqus environment, Simcenter 3D 2021.1 Series

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