Woven ply material

Weaves have warp (1) and weft (2) fibers. The nominal yarn angle (3) is the angle between warp and weft fibers before shearing occurs. Yarn angle (4) may change after shearing. The nominal yarn angle is usually 90° as illustrated in the following graphic. However, the nominal yarn angle does not have to be 90°.

The software uses the improved woven model to calculate the equivalent ply anisotropic properties when:

• The nominal yarn angle is not 90°.

• A woven fabric is draped over a doubly-curved surface causing the warp and weft yarns to shear relative to each other and the material to behave anisotropically with respect to the warp direction.

The plies that exhibit non-orthogonal yarn angle can be defined using Simcenter 3D orthotropic materials as well as Laminate Composites woven ply materials. You can then specify the nominal yarn angle in the Laminate Ply Material dialog box under the Improved Woven Model group.

With the improved woven model, Laminate Composites does the following:

• Computes the equivalent anisotropic material properties for plies with non-orthogonal yarn angle.

• Applies the computed anisotropic elastic constants, thermal expansion coefficients, and thermal conductivities to the Simcenter Nastran, Simcenter Samcef, and Simcenter 3D Multiphysics FEM.

• Considers the shear in the failure metric computation.

With the improved woven model, you can simulate the as-manufactured mechanical properties of weaves that exhibit shear to assess stiffness, stability, thermal conductivity and strength.

Where do I find it?

Application	Pre/Post
Prerequisite	A FEM as the work part.Simcenter Nastran, Simcenter Samcef, or Simcenter 3D Multiphysics as the specified solver.

Activating the improved woven model for orthotropic materials

Prerequisite	At least one ply using a Simcenter 3D orthotropic material, and the draping solver set to woven or imported.UGII_USER_DIR environment variable pointing to the parent of the startup folder which contains the Advanced_Woven.udmpx file.
Command Finder	Manage Materials
Location in dialog box	(Manage Materials dialog box)→New Material group→Type=Orthotropic→Create material (Orthotropic Material dialog box)→Laminate tab→Account for Woven Fiber Shear

Activating the improved woven model for woven ply materials

Prerequisite	At least one ply using a woven ply material, and the draping solver set to woven.
Command Finder	Ply Materials
Location in dialog box	(Laminate Ply Material Manager dialog box) Ply Material Creation group→Type=Woven→Create(Laminate Ply Material dialog box)→Improved Woven Model group→Account for Woven Fiber Shear and Nominal Yarn Angle

How do I

Create a fiber-reinforced ply material

Create a core ply material

Learn more

Defining materials for laminate plies

Ply materials

Isotropic materials

Orthotropic materials

Look up more details

Fiber-reinforced ply material

Core ply material

Fiber-reinforced ply material types

Isotropic material properties for 2D and 3D elements

Orthotropic material properties for 2D elements

Orthotropic material properties for 3D elements

Matrix and fiber isotropic material properties

Fiber orthotropic material properties

Quick links

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Pre/Post video examples

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Woven ply material, Simcenter 3D 2021.1 Series

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