This user-friendly book provides the reader with a theoretical and practical knowledge of the finite element method (FEM) and with the skills required to analyze engineering problems with ANSYS®. A self-contained, introductory text, it minimizes the need for additional reference material, covering the fundamental topics in FEM as well as advanced topics concerning modeling and analysis with ANSYS®. Extensive examples from various engineering disciplines are presented in a step-by-step fashion, focusing on the use of ANSYS® through both the Graphics User Interface (GUI) and the ANSYS® Parametric Design Language (APDL). Additional materials for this book, including the ‘input’ files for the example problems, as well as the colored figures and screen shots, allowing them to be regenerated on the reader’s own computer, may be downloaded from http://extras.springer.com.
Tabella dei contenuti
Preface.- List of Problems Solved.- Introduction: Concept.- Nodes.- Elements.- Direct Approach.- Linear Spring.- Heat Flow.- Assembly of the Global System of Equations.- Solution of the Global System of Equations.- Boundary Conditions.- Fundamentals Of ANSYS®: Useful Definitions.- Before an ANSYS® Session.- Analysis Discipline.- Time Dependence.- Nonlinearity.- Practical Modeling Considerations.- Organization of ANSYS® Software.- ANSYS® Analysis Approach.- ANSYS® Preprocessor.- ANSYS® Solution Processor.- ANSYS® General Postprocessor.- ANSYS® Time History Postprocessor.- ANSYS® File Structure.- Database File.- Log File.- Error File.- Results Files.- Description of ANSYS® Menus and Windows.- Utility Menu.- Main Menu.- Toolbar.- Input Field.- Graphics Window.- Output Window.- Using the ANSYS® Help System.- Help Contents.- Help Index.- Search in Help.- Verification Manual.- Fundamentals of Discretization: Local and Global Numbering.- Approximation Functions.- Coordinate Systems.- Generalized Coordinates.- Global Coordinates.- Local Coordinates.- Natural Coordinates.- Shape Functions.- Linear Line Element with Two Nodes.- Quadratic Line Element with Three Nodes:
Centroidal Coordinate.- Linear Triangular Element with Three Nodes:
Global Coordinate.- Quadratic Triangular Element with Six Nodes.- Linear Quadrilateral Element with Four Nodes: Centroidal Coordinate.- Isoparametric Elements: Curved Boundaries.- Numerical Evaluation of Integrals.- Line Integrals.- Triangular Area Integrals.- Quadrilateral Area Integrals.- Problems.- ANSYS® Preprocessor: Fundamentals of Modeling.- Modeling Operations.- Title.- Elements.- Real Constants.- Material Properties.- Element Attributes.- Interaction with the Graphics Window:
Picking Entities.- Coordinate Systems.- Working Plane.- Solid Modeling.- Bottom-up Approach: Entities.- Top-down Approach: Primitives.- Boolean Operators.- Adding.-Subtracting.- Overlap.- Gluing.- Dividing.- Additional Operations.- Extrusion and Sweeping.- Moving and Copying.- Keeping/Deleting Original Entities.- Listing Entities.- Deleting Entities.- Viewing a Model.- Plotting: Pan, Zoom, and Rotate Functions.- Plotting/Listing Entities.- Numbers in the Graphics Window.- Meshing.- Automatic Meshing.- Manipulation of the Mesh.- Selecting and Components.- Selecting Operations.- Components.- ANSYS® Solution And Postprocessing: Overview.- Solution.- Analysis Options/Solution Controls.- Boundary Conditions.- Initial Conditions.- Body Loads.- Solution in Single and Multiple Load Steps.- Failure to Obtain Solution.- Postprocessing.- General Postprocessor.- Time History Postprocessor.- Read Results.- Plot Results.- Element Tables.- List Results.- Example: One-dimensional Transient Heat Transfer.- Finite Element Equations: Method of Weighted Residuals.-Example: One-dimensional Differential.- Equation with Line Elements.- Example: Two-dimensional Differential.- Equation with Linear Triangular Elements.- Example: Two-dimensional Differential Equation with Linear Quadrilateral Elements.- Principle of Minimum Potential Energy.- Example: One-dimensional Analysis with Line Elements.- Two-dimensional Structural Analysis.- Problems.- Use of Commands in ANSYS®: Basic ANSYS® Commands.- Operators and Functions.- Defining Parameters.- A Typical Input File.- Selecting Operations.-Extracting Information from ANSYS®.- Programming with ANSYS®.- DO Loops.- IF Statements.- /OUTPUT and *VWRITE Commands.- Macro Files.- Useful Resources.- Using the Log File for Programming.- Using the Verification Problems for Programming.- Linear Structural Analysis: Static Analysis.- Trusses.- Beams.- Three-dimensional Problems.-.- Plates and Shells.- Linear Buckling Analysis.- Thermomechanical Analysis.- Fracture Mechanics Analysis.- Dynamic Analysis.- Modal Analysis.- Harmonic Analysis.-
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