© 2011 Autodesk Stressed Up: From Inventor Simulation to Simulation Mechanical Wasim Younis Senior Application Engineer, Symetri UK James Herzing Technical Consultant, Autodesk USA

© 2011 Autodesk Class Summary In this class, you will learn how to take analysis beyond Inventor Simulation into Simulation Mechanical (formerly Algor® Simulation). The examples selected for this class are common to many industries and include assembly stress analysis, linear dynamics, large-scale models made up of beams/shells/solids, bolted connections, plastic deformation and composites.

© 2011 Autodesk Learning Objectives At the end of this class, you will be able to:  Create and analyze Snap-fit/Bolted Connection type parts/assemblies  Determine permanent failure/plastic deformation of parts  Create composite models using surface parts  Create and analyze models with mixed elements, such as beams and plates

© 2011 Autodesk Agenda 13:15–3:25 Introduction Product Overview 23.25–3.55 Inventor/Mechanical Simulation – Wasim Younis Snap-fits and Bolted Connections 33.55–4.35 Mechanical Simulation – James Herzing Composites, Mixed Element Modeling and Linear Dynamics 44.35–4.45 Q&A Open Discussions

© 2011 Autodesk Product Overview

© 2011 Autodesk Product Overview Dynamic Simulation  Automatic transfer of constraints to Joints  Export FEA Loads Stress Analysis  Automatic creation of contacts  Parametric Geometry Optimization Frame Analysis  Automatic creation of beams  Automatically connects beam ends Can only simulate Rigid Body Motion Can only perform Linear Analysis Can only perform Beam Analysis INVENTOR SIMULATION VERY EASY TO USE

© 2011 Autodesk Product Overview – Stressed UP  Linear Analysis  Large Scale Models  Bolted Connections  Composites  Thermal  Friction  Fatigue  Non-Linear Analysis  Snap fits  Drop tests  Seals  Large Scale Deformation.

© 2011 Autodesk Snap-fit – Inventor & Simulation Mechanical

© 2011 Autodesk Snap-fit Offshore industry application Goal  Force required  Determine any plastic deformation

© 2011 Autodesk Snap-fit Inventor Simulation Workflow  Known snap fit displacement  Simplify the model  Refine mesh around snap fit  Analyze Results  Safety Factor

© 2011 Autodesk Snap-fit Simulation Mechanical Workflow  Simplify the model  Material Model  Boundary Conditions  Analyze Results  Plastic Deformation  Opening Force

© 2011 Autodesk Snap-fit Workflow demonstration 1 – AVI of results

© 2011 Autodesk Bolts – Inventor & Simulation Mechanical

© 2011 Autodesk Bolted-Connections Offshore industry application Goal  Seal contact  Pre-stressing due to bolt preload

© 2011 Autodesk Bolted-Connections Inventor Simulation Workflow  Known allowable bolt stress  Simplify the model  Define non-linear contacts  Analyze Results  Seal contact

© 2011 Autodesk Bolted-Connections Simulation Mechanical Workflow  Simplify the model  Bolt Wizard  Boundary Conditions  Analyze Results  Seal Contact

© 2011 Autodesk Bolted-Connections Workflow demonstration 2 – AVI of results

© 2011 Autodesk

Working with Composites

© 2011 Autodesk Modeling Composites There are two options for modeling a composite part: 1.Solid modeled and mid-plane meshed in Autodesk Simulation 2.Surface modeled and Plate/Shell meshed in Autodesk Simulation The advantage of composites over solid elements is that many thin layers of material can be defined without many small elements.

© 2011 Autodesk Defining Your Composite Properties Element Definition and Material Properties Orientation Angle Controls the angle a laminate is placed in a stack. Materials are not defined as normal, but in the element definition as well. It is required to supply a Modulus of Elasticity and a Poisson’s Ration in the various directions. Without shear data, laminate strain cannot be computed.

© 2011 Autodesk Reviewing Composite Results The normal results are available such as displacement and stress Thick/Thin Composite Options: Total Strain Mechanical Strain Initial Strain These can be graphically viewed for each individual lamina, or by worst result

© 2011 Autodesk Mixed Element Modeling

© 2011 Autodesk ROI of Upfront Analysis Cost of Utility Poles without Analysis: Savings with Analysis of Utility Poles:

© 2011 Autodesk How to Model this Layout? Utility Pole and Cross Arms – Solid Speed Limit Sign – Plate Power Line - Truss Wind Load – Surface Pressure Ice Load – Beam Distributed Load Element Type: Loading Conditions: Results Evaluation: Bricks and Plates have normal stress and stain Line elements have specific options

© 2011 Autodesk Mixed Element Modeling and Dynamic Analyses

© 2011 Autodesk Dynamic Analyses Linear Dynamic Analysis Options: Natural Frequency (Modal) Natural Frequency (Modal) with Load Stiffening Response Spectrum Random Vibration Frequency Response Transient Stress (Direct Integration) Transient Stress (Modal Superposition) Critical Buckling Load

© 2011 Autodesk Dynamic Analyses To do any further dynamic analysis, it is first necessary to run a Modal analysis. Lumped masses are available in Modal, but for further loads to be considered, Natural Frequency with Load Stiffening must be used. After the Modal analysis, you must point to those results, and then supply the vibration data. The results look the same as LSS after this!!!

© 2011 Autodesk Questions Wasim Younis Senior Applications Engineer Symetri UK James Herzing Technical Consultant Autodesk UK

© 2011 Autodesk Additional Simulation Resources Available from AMAZON Available from AMAZON Linkedin Support ForumSimulation Blog Youtube Simulation Videos

© 2011 Autodesk Autodesk, AutoCAD* [*if/when mentioned in the pertinent material, followed by an alphabetical list of all other trademarks mentioned in the material] are registered trademarks or trademarks of Autodesk, Inc., and/or its subsidiaries and/or affiliates in the USA and/or other countries. All other brand names, product names, or trademarks belong to their respective holders. Autodesk reserves the right to alter product and services offerings, and specifications and pricing at any time without notice, and is not responsible for typographical or graphical errors that may appear in this document. © 2011 Autodesk, Inc. All rights reserved.