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Modeling Composites using HyperLaminate
HyperLaminate is a HyperMesh module that facilitates the creation, review and edition of composite
laminates. It follows classical laminated plate theory for simple in‐plane analysis of composite laminates
and also facilitates the creation of DV’s and Materials for Composite Optimization
To access HyperLaminate within HM, go to 2D page “HyperLaminate” panel OR “Properties” pull
down:
Creating a Laminate using HyperLaminate:
How to create the material and the properties for the laminate: [‐45, 90, 45, 0]s with ply thickness equal
to 1mm and material properties as shown below:
Tip/Trick #: 1025 HW Product: HyperMesh HW Version: HW 8.0SR1 and Greater Category: Composites / HyperLaminate Topic: Modeling Composites using HyperLaminate
E1 = 1.3e5 Mpa ; E2 = E3 = 9650 Mpa
u12 = u13 = 0.3 ; u23 = 0.36
G12 = G13 = 3450 Mpa ; G23 = 3100 MPa
a1 = 1.0e‐7 mm/mm/oC ; a2 = a3 = 18.0e‐6 mm/mm/oC
Creating Orthotropic Material
1. Expand the Material Tree under “Laminate Browser” and right click on “MAT 8” and hit “New” 2. Key in the Orthotropic Material (MAT 8) details as listed above under “Define/Edit Material”
field as shown below
Creating Composite Property
3. Expand the Laminates Tree under “Laminate Browser” and right click on “PCOMP” and hit “New”
4. Provide the name of the Laminate and the “Stacking Sequence Convention” Under “Ply lay‐up order” one can either stack Multiple Material in varying Orientations or Same
Material in varying Orientations
5. Under “Add/Update plies” field select the Material created under Step‐1, thickness and Orientation
6. Click on the “Add New Ply” to update the “Ply lay up order”. Repeat Step – 5 with varying Orientation and Thickness to stack up the plies in different directions as shown below
Types of Composite Properties available
PCOMP ‐ Defines the structure and properties of an n‐ply composite laminate material
PCOMPG ‐ Defines the structure and properties of a composite laminate material, allowing for global ply identification
Various Options available under “Laminate Definition”
Output Ply results – Set to option “YES” would activate “SOUT” field which would output Stress and failure index request for individual plies. This is available for Nastran and Optistruct
Failure Theory ‐ Once one or more SOUT fields are set to YES it is possible to activate failure theory calculation, by checking the Failure Theory check‐box, selecting a theory from the pull‐down list and defining an Interlaminar shear allowable value
Stacking Sequence – Total, Symmetric, Antisymmetric, Symmetric‐Midlayer, Antisymmetric‐Midlayer, Repeat
Common Thickness ‐ Common thickness gives every ply in the laminate the same thickness
Ply lay up Order ‐ This table describes the laminate from the bottom ply (most negative Z) moving upwards (increasing in positive Z direction)
Creating Load Case
7. Expand the HLS Load case tree under “Laminate Browser” and right click on “In‐plane loads” and hit “New” as shown below
8. Key in the Load case name and the Load value in a given direction. Hit “Apply”
Using HyperLaminate to Calculate the Laminate properties:
9. In the above steps we have successfully defined the Composite Properties, Ply Stacking Sequence and the Load case. One can use these details to calculate “Laminate Properties”
10. Go back to “Laminate definition” under Step‐6 and Click on “Assign Load case”. This would open a new window with the Load case created under Step – 8
11. Kindly check the option, review the Loading value and hit “Apply” to update the loading value
Reviewing Laminate Results:
12. Click in “Calculate” button as shown above. HyperLaminate provides the option to review the following results:
Stiffness/Material Matrix Results
Mid‐Plane Results
Global System Results
Material System Results
Principal Results
Invariant Results