复合材料ANSYSACP仿真教程

Thru‐Thickness ILS & ILN Stress Plots – Shells
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Post-processing of Composite Results
Sandwich Construction Post-processing.
— Wrinkling
• Local buckling of a face sheet under compression • Failure indicator available using shell modeling of sandwich
Example below shows parametric changes of doubler width shown in red.
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Post-processing of Composite Results
Efficient post-processing of composite-specific results quantities. New Sampling Element post-processing.
— One of ACP(Pre) strengths is that the 2D shell mesh can be extruded into a 3D solid model.
— CAD support: STEP and IGES geometries can be imported to define thick cores or use as guides for 3D extrusions.
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Starting ACP from WB
Once shell mesh is generated and materials defined, ACP can be started by right cg and Post-processing
Once the model is setup in APC(Pre) it can be linked to whatever type of analyses you need to solve:
— ANSYS Composite PrepPost can predict these base on the work of Roos, Kress, & Ermanni
Critical Stresses in Bend
Thru‐Thickness ILS & ILN Stress Plots – Solids
orientations)
— Define the element orientation (so as to properly orient materials)
— Define the ply sequence for groups of elements (usually corresponding to faces of the geometry)
— Interface with Vistagy’s FiberSim. — Modify the fiber orientation to something that is actually observed on the
manufacturing floor through alignment with local rosettes.
— Core Failure
• Local failure of core in shear or tensile loading • Failure indicator available using shell modeling of sandwich
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Advanced ACP Capabilities
Set-up composite material fabric definitions, element orientations, ply layup, etc
Generate Shell Mesh
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Composite Materials
In Engineering Data, there is now a composite materials library.
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Parametric Modeling of Composites
Since ACP is integrated into Workbench, the composite data from ACP will be updated with any parameter changes in WB.
— Plot worst case failure criteria over all layers. — Pick element and see stress/strain and failure through the thickness
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Post-processing of Composite Results
Agenda
9:00 – Welcome
— Introductions — What is new at CAEA
9:15 - Mechanical Demonstration
— CAD connection utilities (within the CAD API)
— Mechanical setup
ANSYS v14.5 Update Seminar
CAE Associates Inc. and ANSYS Inc. Proprietary © 2013 CAE Associates Inc. and ANSYS Inc. All rights reserved.
ACP Background
Show Libraries
Material does not need to be assigned to bodies in Mechanical. Material assignment is done in ACP.
All materials in Engineering Data are brought into ACP.
— Meshing shell geometry, applying loads and boundary conditions.
— Can be in ANSYS Mechanical or Mechanical APDL — Define materials (Engineering Data, or APDL)
Solve the model - computed by the standard ANSYS solver, in batch mode.
Post-process the results in ACP: deformations, thicknesses and failure criteria.
• Rigid Bodies, Joints, contact, meshing • Using the Mechanical model as a template.
— Submodeling (parametric mesh refinement)
10:30 - Break 10:45 - Result evaluation: What do I do
— R14 Improved solid model extrusion, transitioning, and drop-off capabilities
Make thru-thickness stress plots and account for interlaminar normal stresses with shells.
— Traditional shell approaches can not account for interlaminar normal stress (shown in blue curve)
Fiber orientation prediction and modification.
— Use internal ACP draping simulation to compute orientation changes due to geometry curvature, develop flat pattern.
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Advanced ACP Capabilities
3D Solid Modeling:
— If a composite part is thick and bulky a shell mesh may not be sufficient to predict accurate results.
— HPC — GPU — RSM — HPC Parametric Pack)
1:30 - CFD Update
— Design iteration/optimization using CFX — Shape optimization using Fluent — 1-way FSI
3:00 Break 3:15 – ANSYS Customization Toolkit
Then connect ACP(Post) to the Solution of that analysis.
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ACP Modeling Capabilities
Multiple oriented element sets allow for multi-laminate build-up.
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Incorporation into WB Architecture
Starting with v14.0 ACP is incorporated directly into the WB architecture.
Define composite material properties