A Tutorial Ex1 3r5a13

ANSYS Composite PrepPost v14.5

Tutorial Exercise 1

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A Tutorial • Goals: – Basic composite workflow from a geometry to post-processing. – Build a simple sandwich .

• Load case: Clamped under uniform pressure.

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A Tutorial • Open a new Workbench project and restore the archive “tutorial_1.wbpz”. • Review the boundary conditions, and that the model is well-defined with the default material. Review the results with an isotropic material.

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A Tutorial • Add the A (Pre) component to the existing analysis.

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A Tutorial • First composite materials have to be defined in ANSYS Workbench Engineering Data: • There are two possibilities: 1. Import preconfigured materials from the Composite Materials catalog (see figure below) 2. Create new materials In this example, you will create new materials as shown in the following slides.

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A Tutorial • Define a unidirectional material in ANSYS Workbench Engineering Data with the following properties:

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A Tutorial • Define also a core material: – Uncheck the filter button to display all properties in the toolbox

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A Tutorial • Update Model and then refresh Setup in the A (Pre) component: • Open Setup of A (Pre) with a double-click on Setup (or Edit… in dropdown menu )

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A Tutorial • In A further material data (Fabrics, Stackup and Sublaminates) have to be defined. • Define a new Fabric with the defined materials: – Carbon UD with 0.2 mm thickness, – Foam core with 15 mm thickness.

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A Tutorial • Define a new Stackup with the UD Carbon. A Stackup is a pre-assembled tape also called non-crimp fabric (NCF).

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A Tutorial • Review the Biax properties through the Plot tab.

Click on Apply to update the plot. Click on OK to close the window. © 2012 ANSYS, Inc. All rights reserved.

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A Tutorial • Define a Sub Laminate as shown below and plot the mechanical properties.

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A Tutorial • Define a new Oriented Element Set (OES): Click on an element of the model. 1

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(1) Click in the Element Sets box in the dialog box (2) Select the desired Element Set in the tree

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A Tutorial (1) The Orientation Point and Direction specify the offset direction. Toggle the button in the toolbar and select the OES to check the offset direction. (2) The rosette of an OES defines the material reference (0°) direction. Toggle the button to visualize the reference direction. (Click Update button if no orientation is displayed.)

• The OES is now used to define the layup. The offset direction of the OES and the order of the Modeling Plies define the stacking sequence, the reference direction and the relative angle of the modeling plies specify the fiber alignment. © 2012 ANSYS, Inc. All rights reserved.

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A Tutorial • Define 3 Ply Groups:

• Create the first Modeling Ply:

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A Tutorial 1. Configure the first ply: 1 2 : select in the tree 3: select ply from the list 4: Angle 0° (default) 5

2. Define a second ply in the “Sandwich_Core” Ply Group with the Fabric Core and a Ply angle of 0°. 3. Define a third ply in the “Sandwich_Top” Ply Group with the Fabric Carbon UD and a Ply angle of 90°. Set Number of Layers to 3. © 2012 ANSYS, Inc. All rights reserved.

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A Tutorial • Update the model:

• The ply definition should look like this:

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A Tutorial • Return to ANSYS Project Schematic. – Update the A (Pre) Setup. – Refresh the Section Data. – Update the whole project

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• Updating directly the whole project is also possible. © 2012 ANSYS, Inc. All rights reserved.

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A Tutorial • Add A (Post) System • Update A (Post) Results • Open Results of A (Post) by double-clicking on the cell

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A Tutorial • The Solution is already imported and some standard post-processing definitions are already available.

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A Tutorial • Configure the Scene to visualize the deformations: – The load case (solution) is selected in the General tab. – The Contour Plot tab is used to configure the visualization: Select the definition and component.

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A Tutorial • Update the Scene.

Sum of deformation

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A Tutorial • In the next step a combined Failure Criteria is configured to create an overall failure plot of the composite structure.

• For the 2 materials, the stress limits are already defined at the beginning of this tutorial. • Definitions: Create a Failure Criteria.

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A Tutorial • Choose the following criteria (using the default configuration):

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A Tutorial • Configure the Scene to plot the failure criteria: – On the Contour Plot tab, set Definition to FailureCriteria.1 – Deactivate Ply Wise plotting – Activate the Failure Mode Plot with Mode and Layer options.

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A Tutorial • Update the Scene to get the overall failure plot: – The contour plot shows the maximum inverse reserve factor of each element (through all layers, all selected failure criteria and integration points) – The text plot indicates the critical layer and the critical failure mode.

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A Tutorial • Afterwards the critical regions are investigated using the ply-wise plot option. • The 3D Stress Definition is already defined in the default definitions:

Select the element of interest.

• Create a Sampling Element:

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A Tutorial • Reconfigure the scene properties: – – – –

Select the 3D Stress definition Select Ply Wise Select the critical stress component s2 Press OK to activate the new properties and close the scene dialog

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A Tutorial • Select the Analysis Plies of the Sampling Element to visualize the stress distribution of a single ply.

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A Tutorial • The through-the-thickness distribution of strains, stresses or failure results can be visualized in the Analysis tab of the Sampling Element. • Change to the Analysis Tab of the Sampling Element to configure the through-the-thickness post-processing plot:

Configure the throughthe-thickness plot

Update the plot. © 2012 ANSYS, Inc. All rights reserved.

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