NXLAMINATECOMPOSITES

Laminate Composites | Key Elements12Product Info & WorkflowKey Capabilities3Demonstration 4Question / Answer

PRODUCT INFO & WORKFLOW

NX Laminate Composites Product OverviewNX CAE product for finite element analysis of laminate structures featuring: Intuitive ply and laminate definition tools Efficient validation of composites design Powerful laminate optimization engine Easy-to-use hand layup manufacturing process simulation using: Ply-based modeling Draping and flat pattern creation Prerequisite:NX Advanced Simulationor NX Advanced FEM + FE Solver Environment

Intuitive ply and laminate definition tools

Efficient validation of composites design

Powerful laminate optimization engine

Easy-to-use hand layup manufacturing process simulation using:

Ply-based modeling

Draping and flat pattern creation

Prerequisite:

NX Advanced Simulation

NX Advanced FEM + FE Solver Environment

Laminate Composites PLMWorkflow ConsiderationNX Laminate Composites allows design of laminates in the advanced simulation (CAE) environmentLAMINATE COMPOSITESDesignCAEManufacturing

KEY CAPABILITIES

NX Laminate Composites Core Features Physical Property-based Modeling Ply-based Modeling & Draping Micromechanics-based Ply Materials Laminate Validation Laminate Properties Optimization NX FE Solver Environments Advanced Post-processing & Reporting

Physical Property-based Modeling

Ply-based Modeling & Draping

Micromechanics-based Ply Materials

Laminate Validation

Laminate Properties Optimization

NX FE Solver Environments

Advanced Post-processing & Reporting

KEY CAPABILITIESLaminate Modeling

Physical Property-Based Laminate Modeling Traditional and simplest simulation technique Excellent for preliminary design cycle and simple geometry Interactive modeler allows fast creation of laminate definition

Traditional and simplest simulation technique

Excellent for preliminary design cycle and simple geometry

Interactive modeler allows fast creation of laminate definition

Physical Property-Based Laminate ModelingMinimize the effort required to create and modify complex, multi-ply laminates Ply GroupsPre defined stacking sequencesExcel interface (to/from)

Modeling OptionsPly based or Physical Property based modeling can be used in the same femDecision is made at the collector level

KEY CAPABILITIESPly-based Modeling & Draping

Ply-Based Modeling & DrapingWorkflow simulates manufacturing using the hand layup processPly-based modeling Allows for efficient laminate creation in many cases Automatically computes the physical properties based on the ply definitionsDraping Ability to predict fiber orientations for plies that are laid on undevelopable (doubly curved) surfaces Ability to use splices and cut curves where fiber shear angle becomes problematic

Allows for efficient laminate creation in many cases

Automatically computes the physical properties based on the ply definitions

Ability to predict fiber orientations for plies that are laid on undevelopable (doubly curved) surfaces

Ability to use splices and cut curves where fiber shear angle becomes problematic

Ply-Based ModelingLayup Modeler Similar to laminate modeler, except: Easy and Fast Definition of Layup Definition Manages Global Plies Independent from Physical Properties All Plies in the Layup are Included Option to import layups from laminate modeler

Similar to laminate modeler, except:

Easy and Fast Definition of Layup Definition

Manages Global Plies

Independent from Physical Properties

All Plies in the Layup are Included

Option to import layups from laminate modeler

Ply-BasedModelingSplices and cut curves Uses Polygon Edges in NX Advanced FEM/SIM Used as a Boundary for the Draping Algorithm Ply Orientation can be Different on Each Side of the Splice and Cut Curves FEM Retains Nodal Continuity between Elements on Each Side of the Splices and Cut CurvesPractical usage: Whenever Draping on Undevelopable Surface Causes Excessive Fiber Shear

Uses Polygon Edges in NX Advanced FEM/SIM

Used as a Boundary for the Draping Algorithm

Ply Orientation can be Different on Each Side of the Splice and Cut Curves

FEM Retains Nodal Continuity between Elements on Each Side of the Splices and Cut Curves

Ply-Based ModelingShell Element Material Orientations Define the Zero Degree Angle Direction of the Computed Laminate PropertiesMaterial Orientation Definition Methods Using Fiber Angles from Draping Algorithm Manual Assignment at the Mesh Level Manual Assignment at the Element Level

Define the Zero Degree Angle Direction of the Computed Laminate Properties

Using Fiber Angles from Draping Algorithm

Manual Assignment at the Mesh Level

Manual Assignment at the Element Level

DrapingDraping Algorithm Options UnidirectionalFibers do not Stretch and Remain Parallel Fibers Can Slide Relative to Each Other WovenFishnet Algorithm Orients Warp & Weft Fibers Fibers do not Stretch, but Can Rotate (Shear) Relative to Each Other Lock Angle is the Maximum Allowed Shear Between Warp & Weft Fibers NoneProjection of the Ply Directions using the Material Orientation as the 0 Degree ReferenceFor Stability, the Draping Algorithm uses the 2D Mesh Associated to the Selected Surfaces

Unidirectional

Fibers do not Stretch and Remain Parallel

Fibers Can Slide Relative to Each Other

Woven

Fishnet Algorithm Orients Warp & Weft Fibers

Fibers do not Stretch, but Can Rotate (Shear) Relative to Each Other

Lock Angle is the Maximum Allowed Shear Between Warp & Weft Fibers

None

Projection of the Ply Directions using the Material Orientation as the 0 Degree Reference

DrapingDraped Fiber Orientations Visualization Color Coded to Show Shear between Warp & Weft Fibers

Color Coded to Show Shear between Warp & Weft Fibers

DrapingFlat Patterns Creation Can be exported to NX part files

DrapingZone-Based Definition Feedback: Visualize Elements Sharing the Same Laminate Definition

KEY CAPABILITIESLaminate Validation Tools

Laminate ValidationLaminate Validation Output Stiffness matrices ABDS Equivalent engineering constants

Stiffness matrices ABDS

Equivalent engineering constants

Laminate ValidationStrength Analysis Compute Failure Indices and Margins of Safety Compute Ply Strains and Stresses

Compute Failure Indices and Margins of Safety

Compute Ply Strains and Stresses

Strength AnalysisSupported Failure Theories Maximum Stress Maximum Strain Tsai-Wu Hill Hoffman LaRC0* (planned)

Maximum Stress

Maximum Strain

Tsai-Wu

Hill

Hoffman

LaRC0* (planned)

KEY CAPABILITIESLaminate Properties Optimization

OptimizationLaminate Optimization Tool Goal is to optimize the fundamental behavior of the laminate Optimizes a single laminate physical property (equivalent to coupon testing and optimization)Built around a Genetic optimizer, it can handle Continuous variables such as an orientation angle Discrete variables such as the existence of a ply or selection of a material from a listThe optimization provides 5 laminate definitions that come the closest to fulfilling the objectives You can select one of the five to replace the original laminate

Goal is to optimize the fundamental behavior of the laminate

Optimizes a single laminate physical property (equivalent to coupon testing and optimization)

Continuous variables such as an orientation angle

Discrete variables such as the existence of a ply or selection of a material from a list

You can select one of the five to replace the original laminate

OptimizationDesign Variables Ply orientation Continuous From list Ply existence Ply thickness Continuous From list Ply material

Ply orientation

Continuous

From list

Ply existence

Ply thickness

Continuous

From list

Ply material

KEY CAPABILITIESNX FE SolverEnvironment Support

Multiple FE Solver Environment SupportLaminate Element Type Support for Each SolverNASTRAN PCOMP – MEM/BEND/SMEAR/SMCORE PSHELL ANSYS 2D SHELL181, SHELL99, SHELL91, SOLSH190 3D SOLID186, SOLID191, SOLSH190 ABAQUS 2D S8R, S8R5, S4, S4R, STRI65, S3, S3R 3D C3D8, C3D8R, C3D8I, C3D20, C3D20R, C3D20I, C3D6, C3D15 LS-DYNA 2D *ELEMENT_SHELL 3D *ELEMENT_TSHELL

NASTRAN

PCOMP – MEM/BEND/SMEAR/SMCORE

PSHELL

ANSYS

2D

SHELL181, SHELL99, SHELL91, SOLSH190

3D

SOLID186, SOLID191, SOLSH190

ABAQUS

2D

S8R, S8R5, S4, S4R, STRI65, S3, S3R

3D

C3D8, C3D8R, C3D8I, C3D20, C3D20R, C3D20I, C3D6, C3D15

LS-DYNA

2D

*ELEMENT_SHELL

3D

*ELEMENT_TSHELL

KEY CAPABILITIESPost-processing & Reporting

NX Post-ProcessingGraphical Display of Laminate Results Ply Strains Ply Stresses Ply Failure Indices Shell stress resultants

Ply Strains

Ply Stresses

Ply Failure Indices

Shell stress resultants

Laminates Graphical ReportingLaminates Meta-Solution Results Data in binary BUN result file format Allows you to Envelope ply and load case results Margins of safety Failure indices Ply stresses Ply strains

Data in binary BUN result file format

Allows you to Envelope ply and load case results

Margins of safety

Failure indices

Ply stresses

Ply strains

Laminates Spreadsheet ReportingQuickly Identify Problem Areas Excel Interface Single or multiple results sets Single or multiple load cases Ply stresses and strains Recover from solution, or Compute using shell stress resultants and current laminate definitions, or Both

Excel Interface

Single or multiple results sets

Single or multiple load cases

Ply stresses and strains

Recover from solution, or

Compute using shell stress resultants and current laminate definitions, or

Both

Laminates Spreadsheet ReportingTop summary showing filtered and sorted results for all results files and casesFor each results file and load caseSolver stresses and derived resultsResults derived from solver shell stress resultantsSolver shell stress resultants

DEMONSTRATION

QUESTION / ANSWERRemi Duquetteremi.duquette.ext@siemens.comremi.duquette@mayahtt.com