© 2015 ANSYS, Inc. 1

ANSYS Composite Prepost复合材料建模技术

杜伟卓

© 2015 ANSYS, Inc. 2

Overview

What’s new for Composite Modeling in R16

Renamed Objects

Enhancements in ACP

Enhancements in Mechanical

Where to find more information

Q & A

© 2015 ANSYS, Inc. 3

Improvements to Composite Analysis in R16

Composites

ACP

Solid Modeling

Solid Cut-off Feature

Direct Selection of

CAD Solids & Surfaces

Solid Assemblies

Field Dependent Material Data

Shear, Temperature

& Degradation Dependency

Look-up Table Plots

Usuability

Unit System Solution Selection 3D Interaction Shared

Licencing

Integration in ANSYS Installer

Special Features

Conversion of Legacy Models

Progressive Damage Post-

processing

Mechanical

Ply Lay-up

Ply visualization,

post-processing

Shell Meshing

Improved Quad Mesh,

Mesh Connections,

etc

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• New Feature Names

• Sampling Element = Sampling Point

• Rule = Selection Rule

• Modeling Ply Group = Modeling Group

• Oriented Element Set = Oriented Selection Set

Renaming of Objects

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Solid Modeling

Solid Cut-off Feature

Direct Selection of CAD Solids & Surfaces

Solid Assemblies

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New Solid Model Geometry Cut-Off Feature

Define arbitrary cut-offs in your structured solid composite models

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•Structured layered solid mesh is maintained

•Degenerated hexahedral elements at the cut out boundaries or within drop-offs are decomposed into homogeneous prism and tetrahedral elements if needed.

•Material handling for drop-offs: − Global (default)

− Custom per fabric/stackup

•Material handling for cut-offs: − Computed (default)

− Global

− Custom per fabric/stackup

Resulting Structured Layered Solid Models

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•Solids and surfaces of imported CAD geometries become selectable objects

•Select geometric objects in 3D scene or object tree

•Define new virtual geometries as associative references to arbitrary sub-shapes of the imported geometry

Direct Selection of CAD Solids and Surfaces

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•Mechanical R16.0 takes care of renumbering entities automatically when assembling (composite) parts

•The renumbering can be disabled per composite cell

Automatic Renumbering in Mechanical Composite Assemblies

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Field Dependent Material Data

Shear, Temperature & Degradation

Factor Dependent Material Data

Look-up Table Plots

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Shear, Temperature, and Degradation Factor Dependant Material Data

Environmental conditions and the manufacturing process have significant influence on the effective material characteristics.

Carbon-epoxy cross-section showing voids (Prof IM Daniel, Northwestern University, USA)

Composite draping: shear and wrinkling (Dr M Sutcliffe, University of Cambridge, UK)

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Include the effect of draping shear and manufacturing artifacts on the material properties in your simulation.

Degradation Field and Draping Simulation

Model local imperfections using degradation factors

Sound composite ACP draping simulation reveals local ply shearing and thickening

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Enhanced Material Data Definition in ED

Elasticity and Strength properties interpolated based on local shear, temperature, and degradation factor → make use of wide materials characterization!

Orthotropic

elasticity

stress limits

strain limits

woven specs for Puck

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How to Define a Degradation Field

Using 3D Look-up Tables based on CSV-files allows for full flexibility.

Degradation of 1 = sound

Degradation of 0 = fully degraded

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Load Case: 14’000RPM, Δp = 10kPa

A Simple Example – Inverse Reserve Factor

Study the impact of manufacturing grade and operating environment on component integrity.

No fields applied Degradation and draping active

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Contour Plots for Lookup Tables

Look-up table plots along with plotting the supporting points facilitates easy setup of scalar fields such as thickness, angles, or degradation.

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Usuability Improvements

Unit System

Solution Selection

3D Interaction

Shared Licencing Supported

Integration in ANSYS Installer

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•User can now freely choose unit system in ACP

•ACP remembers the last unit system used (same logic as Mechanical)

Enhanced Unit System Handling for Composite WB Projects

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The solution set selection (time step selection) no longer on the solution object

Direct selection of the solution set possible in plots, sampling points and envelope solution.

Solution Selection

Solutions set displayed for information only here

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Enhanced 3D Interaction

Camera rotation similar to Mechanical Red dot indicates center

Probe can be deactivated with “Probe Values on Hover” button in toolbar

Deformed Shape is now set for the scene and not for individual plots

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Licencing Licensing is now handled through the ANSYS Licensing Manager

An CompositePrepPost licence can be shared between multiple ACP programs

Installer ACP can now be installed through the unified ANSYS installer.

Shared Licencing & Unified Installer

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Special Features

Conversion of Legacy Models

Progressive Damage Post-

processing

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New Conversion of Legacy MAPDL Composite Models to WB/ACP Projects

1. Import MAPDL model into ACP as postprocessing

model

2. Set model unit system

3. Save H5 file of layup

4. Create new WB project

5. Define materials in Engineering Data. Or export

materials from ACP Post in xml and import in

Engineering Data

6. Create shell mesh by using existing mesh

(External Model) or create new mesh in

Mechanical

7. Import layup from H5 file in ACP-Pre

Limitation: Shell model only

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New Postprocessing of Progressive Damage in ACP Post

Post-process possibilities: • Max damage per element / composite stack • Ply wise damage

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Mechanical

Ply Lay-up Shell Meshing

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ACP Ply Visualization in Mechanical

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Analysis plies can be displayed as hierarchy or flat view

Analysis Plies showing ACP Hierarchy of Modeling and Production Ply Groups

Flat List of all Analysis Plies

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Display of Single Ply Information

Select a single ply in Tree

Highlight Elements in Pink Showing Fiber Direction and Element Normal Can display Transverse direction also when

enabled

Toggle Fiber Direction and Element Normal

Detailed View updates with ACP imported information of single Ply

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Display of Fiber Stresses by Ply or by Layer

Ability to change Position in a Ply Pick a Ply and change CSYS

Use arrow key to navigate between ply results

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Shell Mesh Improvements

Improved Quad Meshing

Improved Mesh Connections

Node merge feature

Default settings, R15 algorithms “Fixed” setting, new R16 algorithms

Composite analysis benefits from the improvements to shell meshing in Mechanical

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Where to find more information

Release Notes in the ANSYS Help

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Tutorials & Training Material

Tutorials in the examples folder of the installation directory and on the customer portal.

Training material in the process of being updated but not available yet.

There will be an ACP R16.1 release, with notable performance enhancements.

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Thank you