Copyright ® 2000 MSC.Software Copyright 2004 MSC.Software Corporation MSC.Laminate Modeler PAT325 Course Notes February 2004 MSC.Software Corporation United States MSC.Patran Support Tel: Fax: Tokyo, Japan Tel: Fax: Munich, Germany Tel: (+49) Fax: (+49) MacArthur Place Santa Ana, CA 92707, USA Tel: (714) Fax: (714) Web: Part Number: P3*V2004*Z*Z*Z*SM-PAT325-NT1

Copyright ® 2000 MSC.Software Copyright 2004 MSC.Software Corporation DISCLAIMER MSC.Software Corporation reserves the right to make changes in specifications and other information contained in this document without prior notice. The concepts, methods, and examples presented in this text are for illustrative and educational purposes only, and are not intended to be exhaustive or to apply to any particular engineering problem or design. MSC.Software Corporation assumes no liability or responsibility to any person or company for direct or indirect damages resulting from the use of any information contained herein. User Documentation: Copyright 2004 MSC.Software Corporation. Printed in U.S.A. All Rights Reserved. This notice shall be marked on any reproduction of this documentation, in whole or in part. Any reproduction or distribution of this document, in whole or in part, without the prior written consent of MSC.Software Corporation is prohibited. MSC and MSC. are registered trademarks and service marks of MSC.Software Corporation. NASTRAN is a registered trademark of the National Aeronautics and Space Administration. MSC.Nastran is an enhanced proprietary version developed and maintained by MSC.Software Corporation. MSC.Patran is a trademark of MSC.Software Corporation. All other trademarks are the property of their respective owners.

Copyright ® 2000 MSC.Software Copyright 2004 MSC.Software Corporation TABLE OF CONTENTS Section Page 1.0 Introduction to MSC.laminate Modeler ………………………….………………..…………………………..1-1 Overall Purpose of Seminar……………………………..………………………………………………………… Composite Modeling Terminology ………………………………………………….…………………………2-1 Composite Material ……….………………………………………………………………………………………….2-3 Composite Lamina...………………………………………………………………………………………………….2-4 Warp and Weft(Fill) ………………………………………………………………………………………………….2-5 Laminate ……………..……………………………………………………………………………………………….2-6 Composite Structure …………………………………………………………………………………………………2-7 Composite Descriptions ……………………………………………………………………………………………..2-8 Ply, Zone, Ply Modeling …………………………………………………………………………………………… Elastic Behavior of Materials and Classical Lamination Theory …….……………….………………..3-1 Elastic Behavior of Materials ……………………………………………………………………………………… Classical Lamination Theory………………………………………………………………………………………… Building Composite Models With MSC.Patran ………………………………….………………………….4-1 Simulation Approach …………………..…………………………………………………………………………….4-3 Example: Create Composite Model Using MSC.Patran ………………………………………………..……..4-4 Utilities Layup …………………………………………………………………………………………………………4-11 Workshop 1 Composite Model of Loaded Flat Plate ………………………………………………..…….… Failure Criteria for Composites …………………………………………………………………………………5-1 Failure Mechanisms of Unidirectional Lamina …………………………………………………………………….5-4 Definitions…………………………….………………………………………………………………………………..5-6 Failure Theories ………………………………………………………………………………………………………5-7 User Defined Failure Criterion……………………………………………………………………………………….5-14 Strain-based Criteria………………………………………………………………………………………………….5-18 MSC.Patran and MSC.Laminate Modeler…….……………………………………………………………………5-19 Workshop 2 Failure Criteria for Flat Plate…………………………………………………………………….5-23 Workshop 3 Flat Plate Using MSC.Laminate Modeler……………………………………………………….5-23

Copyright ® 2000 MSC.Software Copyright 2004 MSC.Software Corporation TABLE OF CONTENTS (cont.) SectionPage 6.0 Making Plies With MSC.Laminate Modeler ………………………………………………………………….6-1 Problems With use of Laminates …………..…………………………………………………………………..6-3 Simple Example of Property Sets……………………………………………………………………………………6-6 Ply Representation in MSC.Laminate Modeler……………………………………………………………………6-9 MSC.Laminate Modeler Forms……………..………………………………………………………………………6-10 Demonstration of ply Menu Inputs………………..……………………………………………………………… Making Layups With MSC.Laminate Modeler..…………………………………………….………….7-1 Creating Layups……………………………………………………………………………………………..7-4 Verifying a Layup……………………………………………………………………………………………7-11 Translating From ply Layup to Laminate Materials…………………………………………………… Create Laminate Form………………………………………………………………………………………7-17 Verify Laminate Material…………………………………………………………………………………… Results for Plies………………………..…………………………………………………………………..8-1 Transforming Results Back to ply Sort….……………………………………………………….……….8-3 Example: Simple Model …………………………………………………………………………… Workshop 4 Making Plies and Layup for a Fairing Component……………………………… Doubly Curved Surfaces……………………………………..……………………………………………9-1 Definition of Surface Types………………………………………………………………………………..9-4 Gaussian Curvature……………………………………………………………………………………… Plies Over Doubly Curved Surfaces……………………….……………………………………………10-1 Local Draping ……………………………………………………………………………………………….10-4 Global Draping ………………………………………………………………………………………………10-8 Global Draping by Extension……………………………………………………………………………… Projecting or Painting Plies…………………………………………………………………………………10-19 Axis Projection………………………………………………………………………………………………10-20

Copyright ® 2000 MSC.Software Copyright 2004 MSC.Software Corporation TABLE OF CONTENTS (cont.) SectionPage 10.0 Plies Over Doubly Curved Surfaces (Continued) ……………..…………..……………………………… 10-1 Case Study: Visualization of ply Pattern………………………………………………………………………10-23 Workshop 5 Draping a Doubly Curved Surface…………………..……………………………………… Introducing Splits in the Plies ………………………………………..………………………………………… 11-1 Defining Splits…………………………………………………….……………………………………………………11-4 Example: Creating Splits……………………………………………………………………………………… Possible Draping Problems………………………………………………………………………………………… Workshop 6 Draping With a Split……………………...…………………………………………………… Modeling Sandwich / Thick Section ……………………………….………………………………………… Limitation of Shell Analysis………………………………………………………………………………………… Modeling Core as ply in Layup………………………………………………………………………………………12-5 Solid Element Analysis………………………………………………………………………………………………12-8 Workshop 7 Modeling Honeycomb Using MSC.Laminate Modeler…………………………..………….12-9 Workshop 7B Modeling Honeycomb With Solid and Shell Elements…..……………………………… Manufacturing Integration ……………………………………………………………………………………….13-1 Export of Patterns and Surfaces…………………………………………………………………………………….13-4 Fabric Thickening…………………………………………………………………………………………………… Model Communication……………………………………………………………………………………………… Springback Analysis………………………………………………………………………………………………… Workshop 8 Springback Analysis of a jet Engine Cowling……………………………………………… Importing and Exporting Data ………………………………………………..…………………………………14-1 Importing Plies Onto a new Mesh………………………….……………………………………………………… Data Transfer Between Analysis and Design………………………………………………………………………14-7 Workshop 9 Importing a Layup Onto a Different Mesh……………………………………….……………14-20

Copyright ® 2000 MSC.Software Copyright 2004 MSC.Software Corporation TABLE OF CONTENTS (cont.) SectionPage 15.0 Optimization of Composites Using MSC.Nastran …………………………………………………………15-1 Composite Optimization ………………………..………………………………………………………………….…15-3 Composite Optimization Variable…..……………………………………………………………………………….15-5 Example: Optimization……………………………….. ……………………………………………………… Setting up Optimization in MSC.Patran…………………………………………………………………………… MSC.Laminate Modeler 2003 Enhancements ……………………………………………………………… Hints and Tips ……………………………………………………………………………………………………… Laminate Definition in MSC.Nastran..……………………………..………………………………………… Miscellaneous Solver Related Items ……………………....………………………………………………… Basic Composite Production Methods ………………………..……………………………………………..20-1