ANSYS mechanical APDL for finite element analysis / Mary Kathryn Thompson, John Martin Thompson.

Format:

Book

Author/Creator:

Thompson, Mary Kathryn, author.

Thompson, John Martin, author.

Language:

English

Subjects (All):

Finite element method.

Physical Description:

1 online resource (448 pages) : illustrations, tables

Edition:

1st ed.

Place of Publication:

Oxford, England : Butterworth-Heinemann, 2017.

Summary:

ANSYS Mechanical APDL for Finite Element Analysis provides a hands-on introduction to engineering analysis using one of the most powerful commercial general purposes finite element programs on the market. Students will find a practical and integrated approach that combines finite element theory with best practices for developing, verifying, validating and interpreting the results of finite element models, while engineering professionals will appreciate the deep insight presented on the program's structure and behavior. Additional topics covered include an introduction to commands, input files, batch processing, and other advanced features in ANSYS.The book is written in a lecture/lab style, and each topic is supported by examples, exercises and suggestions for additional readings in the program documentation. Exercises gradually increase in difficulty and complexity, helping readers quickly gain confidence to independently use the program. This provides a solid foundation on which to build, preparing readers to become power users who can take advantage of everything the program has to offer.- Includes the latest information on ANSYS Mechanical APDL for Finite Element Analysis- Aims to prepare readers to create industry standard models with ANSYS in five days or less- Provides self-study exercises that gradually build in complexity, helping the reader transition from novice to mastery of ANSYS- References the ANSYS documentation throughout, focusing on developing overall competence with the software before tackling any specific application- Prepares the reader to work with commands, input files and other advanced techniques

Contents:

Front Cover

ANSYS Mechanical APDL for Finite Element Analysis

Copyright Page

Dedication

Contents

Preface

Acknowledgments

1 Introduction to ANSYS and Finite Element Modeling

1.1 What Is the Finite Element Method?

1.2 Why Use the Finite Element Method?

1.3 Basic Procedure for Finite Element Analysis

1.4 Engineering Software-Not an Engineer

1.5 A Brief History of ANSYS and Finite Element Analysis

1.5.1 The Development of NASTRAN

1.5.2 The Development of ANSYS

1.5.3 The Evolution of ANSYS

1.6 ANSYS Today

1.7 ANSYS Licensing

1.8 Functionality and Features of the ANSYS Mechanical APDL Family

1.8.1 Can ANSYS…?

1.8.2 Steady-State and Time-Dependent Analyses

1.8.3 Physics Capabilities

1.8.4 Special Features

1.9 ANSYS: Backward Compatibility and Legacy Code

2 Interacting with ANSYS

2.1 ANSYS Simulation Environments

2.2 Communicating with ANSYS

2.2.1 ANSYS Commands

2.2.2 The Graphical User Interface

2.2.2.1 The Output Window

2.2.2.2 GUI Toolbars and Menus

2.2.2.3 Advantages and Disadvantages of using the GUI

2.2.3 The GUI Command Prompt

2.2.4 Input Files and Batch Files

2.3 How ANSYS Communicates with You

2.3.1 INFO Level Feedback

2.3.2 NOTE Level Feedback

2.3.3 WARNING Level Feedback

2.3.4 ERROR Level Feedback

2.3.5 FATAL Level Feedback

2.4 ANSYS Program Structure

2.4.1 Levels and Processors

2.4.2 The ANSYS Database

2.4.3 Types of Commands and Their Locations

2.4.3.1 Begin Level Commands

2.4.3.2 Processor Level Commands

2.5 ANSYS File Structure

2.5.1 The Database File

2.5.2 The Log File

2.5.3 The Lock File

2.5.4 The Error File

2.5.5 The Output File

2.5.6 The Results File

2.6 Saving Files and Results in ANSYS

2.6.1 Saving Database Files

2.6.2 Archiving Models

2.6.3 Rerunning Log Files.

2.6.4 Creating Input and Batch Files

2.7 Where is the Undo Button?

2.8 How Do You Specify Units?

2.9 Where to Find Help: The ANSYS Documentation

2.9.1 Reference Manuals

2.9.2 Programmer's Manuals

2.9.3 Examples Manuals

2.9.4 Analysis Guides

2.9.5 The Feature Archive

2.9.6 Additional Documentation

2.10 Where to Get Extra Help: ANSYS Technical Support

Exercise 2-1 Static Axial Loading of a Notched Plate in Tension

Overview

Model Attributes

Material Properties for 6061-T6 Aluminum

Loads

Constraints

File Management

Create a New Folder on Your Desktop Named "Intro-to-ANSYS"

Create a New Folder in the "Intro-to-ANSYS" Folder Named "Exercise2-1"

Open a New Session of ANSYS Using the Mechanical APDL Product Launcher

Ensure That the Simulation Environment Is Set to "ANSYS" (Figure 2-1-2)

Change the Working Directory to the New "Exercise2-1" Folder

Change the Jobname to "Exercise2-1"

Click Run to Start ANSYS

Before You Begin

Step 1: Define Geometry

1-1 Create a rectangle to represent the plate

1-2 Create a circle to represent the bottom notch

1-3 Create a circle to represent the upper notch

1-4 Save your progress

1-5 Subtract Areas 2 and 3 (the circles) from Area 1 (the rectangle)

1-6 Save the solid model geometry

Step 2: Define Element Types

2-1 Define the elements type to use for this model

Step 3: Define Material Properties

3-1 Create a linear elastic material model for 6061-T6 aluminum

3-2 Save your progress

Step 4: Mesh

4-1 Create the mesh for the finite element model

4-2 Refine the mesh for the finite element model

4-3 Save your finite element mesh

Step 5: Apply Constraint Boundary Conditions

5-1 Apply degree of freedom constraints to the model

5-2 Apply additional degree of freedom constraints to the model.

5-3 Save your constraints

Step 6: Apply Load Boundary Conditions

6-1 Apply the load to the right edge of the plate

6-2 Save your loads

Step 7: Set the Solution Options

Step 8: Solve

8-1 Select everything in your model

8-2 Solve

8-3 Close the /Status Command Window

8-4 Close the note informing you that the solution is done

8-5 Save your results

Step 9: Postprocess the Results

9-1 Plot the von Mises stress distribution in the plate

Step 10: Compare and Verify the Results

Close the Program

Sample Input File

3 Creating and Importing Geometry

3.1 Considerations for Model Geometry

3.1.1 Choosing Direct Generation or Solid Modeling

3.1.2 Choosing Whether to Create or Import Solid Model Geometry

3.1.3 Choosing the Dimensionality of the Model

3.1.3.1 Characteristics of 1D, 2D, and 3D Models

3.1.3.2 Reducing Model Size Using Symmetry

3.1.4 Choosing How Much Detail to Include

3.2 Creating Model Geometry

3.2.1 Direct Generation of Nodes and Elements

3.2.2 Creating Model Geometry from the Bottom-Up

3.2.3 Creating Model Geometry from the Top Down

3.3 Boolean Operations

3.3.1 Boolean Options

3.3.2 Number Merging

3.3.3 Numbering in Boolean Operations

3.3.4 Boolean Operations: Model First, Mesh Second

3.3.5 Boolean Operation Errors

3.4 Deleting Solid Model Geometry

3.5 Importing Solid Model Geometry

3.5.1 Importing Solid Models Using IGES Files

3.5.2 Importing Solid Models Using Connection Products

3.5.3 Importing CAD Using ANSYS Workbench and DesignModeler

3.6 Coordinate Systems

3.6.1 Global Coordinate Systems

3.6.2 Local Coordinate Systems

3.6.3 The Display Coordinate System

3.7 The Working Plane

3.8 Solid Model Viewing

3.8.1 List

3.8.2 Plot

3.8.3 PlotCtrls

3.8.3.1 Plot Numbering Controls

3.8.3.2 Pan Zoom Rotate Menu.

Exercise 3-1 Bottom-Up Solid Modeling of a Plate With a Central Hole Using Quarter Symmetry

Create a new folder in your "Intro-to-ANSYS" folder named "Exercise3-1"

Open a new session of ANSYS using the Mechanical APDL Product Launcher

Change the Working Directory to the new "Exercise3-1" folder

Change the Jobname to "Exercise3-1"

Click Run to start ANSYS

1-1 Create keypoints to define the lower left corner of the plate

1-2 Create keypoints to define the intersection of the hole with the plate

1-3 Turn on keypoint and line numbering

1-4 Create lines to represent the edges of the plate

1-5 Create a cylindrical local coordinate system

1-6 Create an arc to represent the hole in the plate

1-7 Return the active coordinate system to Global Cartesian

1-8 Create an area to represent the quarter plate with hole

1-9 Save the model geometry

2-1 Define the element type to use for this model

4-2 Refine the mesh along Line 5

5-1 Apply symmetry constraints to the model

5-2 Save your constraints

6-1 Apply the load to the left edge of the plate

8-3 Save your results

9-1 Plot the von Mises stress distribution in the plate.

Step 10: Compare and Verify the Results

Exercise 3-2 Top-Down Solid Modeling of a Pipe Flange Using Symmetry

Material Properties for High Carbon Steel

Create a new folder in your "Intro-to-ANSYS" folder named "Exercise3-2"

Change the Working Directory to the new "Exercise3-2" folder

Change the Jobname to "Exercise3-2"

1-1 Create the pipe cylinder

1-2 Adjust the view

1-3 Bring the Create Cylinder by Dimensions dialog box back to the foreground

1-4 Create the flange cylinder

1-5 Overlap the two cylinders to create the pipe flange

1-6 List the volumes in the model to confirm that the overlap operation was successful

1-7 Save your progress

1-8 Create a solid cylinder to represent the first bolt hole

1-9 Change the coordinate system from Global Cartesian to Global Cylindrical

1-10 Copy the volume that will become the bolt hole to create the bolt circle

1-11 Subtract the bolt hole volumes to create the bolt holes

1-12 Rotate the model

1-13 Save the model geometry

2-1 Define the element type required for this model

3-1 Create a thermal material model for high carbon steel

4-2 Refine the mesh

4-2-1 Refine the mesh in the entire model

4-2-2 Identify the number of the line where the outer edge of the pipe intersects the flange

4-2-3 Refine the mesh along the line where the pipe intersects the flange

Step 5: Apply Constraint Boundary Conditions.

5-1 Apply symmetry constraints to the model.

Notes:

Includes bibliographical references at the end of each chapters and index.

Description based on online resource; title from PDF title page (ebrary, viewed August 24, 2017).

ISBN:

9780128131107

0128131101

9780128129814

0128129816