ansys composite prep/post 12.1 modeling and ?· © 2009 ansys, inc. all rights reserved. 1 ansys,...

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  • 2009 ANSYS, Inc. All rights reserved. 1 ANSYS, Inc. Proprietary 2009 ANSYS, Inc. All rights reserved. 1 ANSYS, Inc. Proprietary

    ANSYS Composite

    Prep/Post 12.1

    Modeling and Assessment

    of Composite Structures

    Pierre THIEFFRY

    Lead Product Manager

    ANSYS, Inc.

  • 2009 ANSYS, Inc. All rights reserved. 2 ANSYS, Inc. Proprietary

    Summary

    Dedicated to allow for easy and efficient definition and

    modification of layered-composite structures as well as their

    specific post-processing

    Dedicated to provide leading-edge technology in pre- and

    postprocessing of layered composite structures

    Integrates with Mechanical Simulation as well as with

    Mechanical APDL

    Provides failure assessment as well as manufacturing

    information such as draping and plybooks.

  • 2009 ANSYS, Inc. All rights reserved. 3 ANSYS, Inc. Proprietary 2009 ANSYS, Inc. All rights reserved. 3 ANSYS, Inc. Proprietary

    Terminology

  • 2009 ANSYS, Inc. All rights reserved. 4 ANSYS, Inc. Proprietary

    Composites

    Composite materials are made of at least two distinct materials with different

    material parameters for each phase

    Fiber reinforced composites (FRC) are composites where one material

    component (fiber) is used as a reinforcing material for the matrix

    Composites have a wide range of usage: sports, civil engineering, automotive &

    aerospace industry, shipbuilding, cables, consumer goods

  • 2009 ANSYS, Inc. All rights reserved. 5 ANSYS, Inc. Proprietary

    What is required to analyze

    laminate composite structures?

    An accurate representation of the structure in its environment:

    geometry, mesh, loads & boundary conditions

    An accurate representation of the composites : material behavior,

    ply definitions, orientations of the fibers

    A numerically accurate solver

    A wide array of tools to investigate and understand the results

    and estimate the risks of failure

    Links to the manufacturing process (draping, plybooks )

    All of this in a user-friendly environment!

  • 2009 ANSYS, Inc. All rights reserved. 6 ANSYS, Inc. Proprietary 2009 ANSYS, Inc. All rights reserved. 6 ANSYS, Inc. Proprietary

    The ANSYS

    Composite

    Prep/Post

    Advantage

  • 2009 ANSYS, Inc. All rights reserved. 7 ANSYS, Inc. Proprietary

    Accurate representation of the

    geometry

    User of the ANSYS

    Composite Prep/Post benefit

    from all the advantages of

    the ANSYS solutions:

    Direct CAD imports from all

    major CAD products

    Import of standard geometry

    formats (STEP, Parasolid)

    Geometry cleaning

    Best-in class meshing

    capabilities for surface and

    solid models with linear or

    quadratic elements

    Meshing information as well

    as loads and boundary

    conditions are transferred to

    ANSYS Composite PrepPost

  • 2009 ANSYS, Inc. All rights reserved. 8 ANSYS, Inc. Proprietary

    Laminate modeling

    A hierarchical data description of materials, stackups and laminates

    Base information:

    Engineering data and material limits

    Fabrics

    Laminates

    Stackups

    Add thickness,

    pricing and draping

    information

    Stack fabrics, add

    pricing and draping

    information

    Define final

    laminate

    product

    Stackups and laminates provides symmetry definition capabilities.

  • 2009 ANSYS, Inc. All rights reserved. 9 ANSYS, Inc. Proprietary

    Easy-to-use yet advanced

    definition of orientations

    A key element of the definition of

    composite materials is the proper

    orientation of the fibers

    ANSYS Composite PrepPost uses a

    concept of oriented element-sets:

    user can define material application

    direction and material 0 direction

    Multiple oriented element-sets can

    be overlapping and differently

    oriented: unique definition of

    asymmetric laminate

    One or several coordinate systems

    assigned to an oriented element-

    set: no need for ply-subdivision

    Cartesian, cylindrical and spherical

    systems are supported

  • 2009 ANSYS, Inc. All rights reserved. 10 ANSYS, Inc. Proprietary

    Defining laminate areas

    Laminates and associated

    orientations are defined on

    zones (element groups)

    Zones can be applied a pre-

    defined laminate

    Additional Laminates can be

    constructed by progressive

    stacking on zones

    Support for layer drop-off

    Easy generation of solid model

    based on shell model (suitable

    for thick laminate analysis)

  • 2009 ANSYS, Inc. All rights reserved. 11 ANSYS, Inc. Proprietary

    Visualization of stacking sequences

    Stacking

    sequences and

    composite

    thicknesses

    can be

    displayed on

    arbitrary

    sections or on

    the entire

    model

  • 2009 ANSYS, Inc. All rights reserved. 12 ANSYS, Inc. Proprietary

    Computing the models solution

    The ANSYS Composite Prep/Post uses the ANSYS

    Mechanical solutions to compute the base solution of

    the model.

    All advantages of our core solutions are therefore

    available:

    Support of the latest element generation: linear and

    quadratic shells, linear and quadratic solids

    Layered element formulation

    Isotropic, orthotropic and anisotropic material models

    Fast and accurate solver

    Multiple time steps support

  • 2009 ANSYS, Inc. All rights reserved. 13 ANSYS, Inc. Proprietary

    General post-processing

    Arbitrarily configurable envelope contour

    failure plots

    Overlay Text-plots for easy identification of

    the relevant failure-modes

    Generate superposition load cases based

    on initial load cases

  • 2009 ANSYS, Inc. All rights reserved. 14 ANSYS, Inc. Proprietary

    Failure Analysis

    ANSYS Composite PrepPost provides a unique

    set of failure criteria to analyze the product:

    From simple criteria (max stress) to state-of-

    the art analysis (Puck, Hashin, Cuntze)

    Interlaminar shear, normal stresses for shells

    Through thickness failure for shells

    Combination of failure criteria provides failure

    envelope

    3D implementation of main criteria (Tsai-Hill,

    Hashin, Puck etc.)

    Ability to create user-defined criteria

    Results can be displayed as:

    Most critical failure criteria

    Critical layer

    Reserve, inversed reserve factors and safety

    margin (based on stress limits)

    Standard results (stresses.) per layer

  • 2009 ANSYS, Inc. All rights reserved. 15 ANSYS, Inc. Proprietary

    Draping and flat-wrap

    ANSYS Composite PrepPostprovides draping functionality to

    analyze for drapability as well as

    for calculation of the fiber-angle

    correction

    Further ANSYS Composite PrepPost can also provide the

    flat-wrap of plies with their

    distortion

    Flatwrap boundaries export to STEP or IGES format

    Flat-wrap

    Draping

    Correction of the element orientation after draping

  • 2009 ANSYS, Inc. All rights reserved. 16 ANSYS, Inc. Proprietary

    Plybook generation

    A set of plies or

    all plies are

    selected for ply-

    book

    generation.

  • 2009 ANSYS, Inc. All rights reserved. 17 ANSYS, Inc. Proprietary

    Additional capabilities

    Python scripting capabilities provide full

    automation for the setup of the composite

    models.

    ANSYS Composite PrepPost can update the

    model definition upon design changes

    without the need to redefine the entire model

    through a simple update of the input mesh.

  • 2009 ANSYS, Inc. All rights reserved. 18 ANSYS, Inc. Proprietary 2009 ANSYS, Inc. All rights reserved. 18 ANSYS, Inc. Proprietary

    Summary

  • 2009 ANSYS, Inc. All rights reserved. 19 ANSYS, Inc. Proprietary

    Summary

    Dedicated to allow for easy and efficient definition and

    modification of layered-composite structures as well as their

    specific post-processing

    Dedicated to provide leading-edge technology in pre- and

    postprocessing of layered composite structures

    Integrates with Mechanical Simulation as well as with

    Mechanical APDL

    Provides failure assessment as well as manufacturing

    information such as draping and plybooks.

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