WS2 Solid Shell Composites Modeling 021312

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  • WS2-1

    Composites Technology Day, February 2012

    Copyright 2012 MSC.Software Corporation

    WORKSHOP 2

    Solid Shell Composites Modeling

  • WS2-2

    Composites Technology Day, February 2012

    Copyright 2012 MSC.Software Corporation

  • WS2-3

    Composites Technology Day, February 2012

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    Workshop Objectives Become familiar with setting up a solid composite shell model

    Software Version

    Patran 2011

    MD Nastran 2011.1

    Files Required

    solid_shell.db

  • WS2-4

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    Problem Description

    Simulate a three-point-bending composite test specimen using solid composite shell elements

    Due to symmetry, only a quarter of the specimen is modeled.

  • WS2-5

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    Copyright 2012 MSC.Software Corporation

    Material Name % Thickness Orientation

    1 Ortho1 1e-3 0

    2 Ortho1 9.999 0

    3 Ortho1 10 90

    4 Ortho1 10 0

    5 Ortho1 40 90

    6 Ortho1 10 0

    7 Ortho1 10 90

    8 Ortho1 9.999 0

    9 Ortho1 1e-3 0

    Problem Description (cont.)

    You will build a laminate by entering each ply thickness as a percentage of the total thickness

    Two very thin outer plies are used to pick up stresses at the outside faces of the part.

    Stress recovery ply

    Stress recovery ply

  • WS1 - 6

    Composites Technology Day, February 2012

    Copyright 2012 MSC.Software Corporation

    a

    Step 1. Open an existing Patran Database

    Start Patran and open a database

    containing the composite coupon:

    a. Click File Open in the Defaults

    group.

    b. Select solid_shell.db as the

    File name.

    c. Click OK.

    c

    b

  • WS2-7

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    Plot loads and boundary

    conditions:

    a. Click the Loads/BCs tab.

    b. Set Action to Plot Markers.

    c. Select Displ_simple_bc

    and click Apply. This plots

    the simple support in the

    vertical direction.

    d. Select Displ_sym1 and

    click Apply. This plots the

    X symmetry constraints.

    e. Select Displ_sym2 and

    click Apply. This plots the

    Y symmetry constraints.

    f. Select Force_force1 and

    Force_force2 and click

    Apply. This plots the

    applied load.

    g. Click Reset Graphics to

    clear the markers.

    Step 2. Review Loads and Boundary Conditions a

    b

    c

    d e

    f

    g

  • WS2-8

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    Verify the element coordinates

    systems:

    a. Click the Meshing tab.

    b. Set action to Show.

    c. Set Object to Element.

    d. Set Info to Coord. Sys.

    e. Click on any element to

    review the element

    coordinate system.

    f. Click on a few more

    elements to review the

    element coordinate system.

    Make a mental note of the

    element Z direction.

    g. Click Reset Graphics.

    Step 3. Verify Element Coordinate System a

    b

    c

    d

    e

    g

    f

  • WS2-9

    Composites Technology Day, February 2012

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    Step 4. Create Material Property

    Create a material property:

    a. Click the Properties tab.

    b. Click 3D in the Orthotropic group.

    c. Name the Material ortho1

    d. Click on Input Properties

    e. Enter the values shown.

    f. Click OK.

    g. Click Apply.

    b

    c

    e

    f

    g

    d

    a

  • WS2-10

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    Step 5. Define the Composite Layup

    Create a Laminated Composite:

    a. In the Properties tab, click

    Laminate in the Composite

    group.

    b. Name the Material lam1.

    c. Click on ortho1 9 times to

    create 9 rows in the table

    d. Select Total-%thickness from the Stacking Sequence

    Convention

    e. Click in the first %thickness cell

    f. Click in the Input Data field and

    enter 0.001 and press the

    Enter key.

    g. Repeat step f to enter all ply %

    thickness values as shown on

    the right. Make sure the total

    percentage is 100 when you

    are done.

    h. Click in the first Orientation cell

    i. Enter the ply angles one at a

    time as shown.

    j. Click Apply.

    b

    c

    e

    a

    d

    c

    e

    f g

    h

    i

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    Composites Technology Day, February 2012

    Copyright 2012 MSC.Software Corporation

    Step 6. Create Solid Property

    Create 3D solid property:

    a. In the Properties tab, click

    Solid in the 3D Properties

    group. (you may have to move

    the Laminated Composite

    form out of the way).

    b. For Property Set Name, enter

    3d-comp.

    c. Change Options to Laminate.

    d. Click Input Properties

    e. Click Material Prop Name icon

    and select lam1.

    f. Click in the Material

    Orientation box, then screen

    select Coord 1.

    g. For Thickness Direction 3D,

    select Element Z Direction.

    h. In SCOMP Integration

    Scheme, select Assumed

    Strain.

    i. Click OK.

    a

    c

    b

    d

    e

    f

    e

    f

    g

    h

    i

  • WS2-12

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    Copyright 2012 MSC.Software Corporation

    Step 6. Create Solid Property (Cont.)

    Create 3D solid property:

    a. Click Select Application

    Region

    b. Rectangle select both solids.

    c. Click Add.

    d. Click OK.

    e. Click Apply.

    a

    c

    d

    e

    b

  • WS2-13

    Composites Technology Day, February 2012

    Copyright 2012 MSC.Software Corporation

    Step 7. Set up Analysis

    Select solution type:

    a. Click the Analysis tab.

    b. Enter

    three_point_bending for

    Job Name.

    c. Click on Solution Type.

    d. Select Implicit Nonlinear.

    e. Click Solution

    Parameters.

    f. Check Shell Shear

    Correction and SOL 400

    Run.

    g. Click OK.

    h. Click OK.

    b

    d

    e

    f

    g

    h

    a

    c

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    Step 7. Set up Analysis (Cont.)

    Define subcase parameters:

    i. Click Subcases.

    j. Select Default

    k. Click Subcase

    Parameters.

    l. Set Linearity to Linear.

    m. Click OK.

    n. Click Apply.

    o. Click Cancel.

    p. Click Apply.

    The analysis will take less

    than a minute to run.

    i

    j

    l

    m

    k

    n o p

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    Step 8. Attach Results

    Attach the results file:

    a. Click MASTER / DBALL in the

    Access Results group.

    b. Click on Select Results File.

    c. Select the results file

    three_point_bending.MASTER.

    d. Click OK.

    e. Click Apply.

    a

    b

    c

    d

    e

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    Step 9. Plot Results

    Plot deformation:

    a. Click the Results tab.

    b. Click the Deformation icon.

    c. Select Displacement,

    Translational for

    Deformation Result.

    d. Click Apply.

    c

    d

    a

    b

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    Copyright 2012 MSC.Software Corporation

    Step 9. Plot Results (cont.)

    Plot stresses:

    a. Click the Fringe icon.

    b. Select Composite Stress, Ply

    Stress for Fringe Result.

    c. Set Position to Layer 1 at

    middle.

    d. Set Quantity to X Component.

    e. Click Apply.

    b

    e

    a

    c

    d

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    Composites Technology Day, February 2012

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    End of Workshop 2

    File/Quit to exit Patran.