Introduction to Finite Element Analysis
Formulation, Verification and Validation
Published on 22. March 2011
372 pages
978-1-119-99348-3 (ISBN)
Description
When using numerical simulation to make a decision, how can itsreliability be determined? What are the common pitfalls andmistakes when assessing the trustworthiness of computedinformation, and how can they be avoided?
Whenever numerical simulation is employed in connection withengineering decision-making, there is an implied expectation ofreliability: one cannot base decisions on computed informationwithout believing that information is reliable enough to supportthose decisions. Using mathematical models to show the reliabilityof computer-generated information is an essential part of anymodelling effort.
Giving users of finite element analysis (FEA) software anintroduction to verification and validation procedures, this bookthoroughly covers the fundamentals of assuring reliability innumerical simulation. The renowned authors systematically guidereaders through the basic theory and algorithmic structure of thefinite element method, using helpful examples and exercisesthroughout.
* Delivers the tools needed to have a working knowledge of thefinite element method
* Illustrates the concepts and procedures of verification andvalidation
* Explains the process of conceptualization supported by virtualexperimentation
* Describes the convergence characteristics of the h-, p- andhp-methods
* Covers the hierarchic view of mathematical models and finiteelement spaces
* Uses examples and exercises which illustrate the techniques andprocedures of quality assurance
* Ideal for mechanical and structural engineering students,practicing engineers and applied mathematicians
* Includes parameter-controlled examples of solved problems in acompanion website (www.wiley.com/go/szabo)
Reviews / Votes
"I highly recommend this as a textbook for anundergraduate engineering course on FE analysis. Moreover, Irecommend this book to every engineer who practices FE computation,since this is a well-written and unique source for studying theextremely important issue of reliability of FE analysis inpractice." (IACM Expressions, 1 September2012)More details
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Hiroshi Ashihara | Alan Crozier | Atsushi Komamine
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Barna Szabó | Ivo Babuska
Introduction to Finite Element Analysis
Formulation, Verification and Validation
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Persons
Barna Szabó is co-founder and president of EngineeringSoftware Research and Development, Inc. (ESRD), the company thatproduces the professional finite element analysis softwareStressCheck®. Prior to his retirement from the School ofEngineering and Applied Science of Washington University in 2006 heserved as the Albert P. and Blanche Y. Greensfelder Professor ofMechanics. His primary research interest is assurance of qualityand reliability in the numerical stimulation of structural andmechanical systems by the finite element method. He has publishedover 150 papers in refereed technical journals. Several of them incollaboration with Professor Ivo BabuSka, with whom he alsopublished a book on finite element analysis (John Wiley & Sons,Inc., 1991). He is a founding member and Fellow of the USAssociation for Computational Mechanics. Among his honors areelection to the Hungarian Academy of Sciences as External Memberand an honorary doctorate.
Ivo BabuSka's research has been concernedmainly with the reliability of computational analysis ofmathematical problems and their applications, especially by thefinite element method. He was the first to address a posteriorierror estimation and adaptivity in finite element analysis. Hisresearch papers on these subjects published in the 1970s have beenwidely cited. His joint work with Barna Szabó on the p-versionof the finite element method established the theoreticalfoundations and the algorithmic structure for this method. Hisrecent work has been concerned with the mathematical formulationand treatment of uncertainties which are present in everymathematical model. In recognition of his numerous importantcontributions, Professor BabuSka received may honors, whichinclude honorary doctorates, medals and prizes and election toprestigious academies.
Content
About the Authors.
Series Preface.
Preface.
1 Introduction.
1.1 Numerical simulation.
1.2 Why is numerical accuracy important?
1.3 Chapter summary.
2 An outline of the finite element method.
2.1 Mathematical models in one dimension.
2.2 Approximate solution.
2.3 Generalized formulation in one dimension.
2.4 Finite element approximations.
2.5 FEM in one dimension.
2.6 Properties of the generalized formulation.
2.7 Error estimation based on extrapolation.
2.8 Extraction methods.
2.9 Laboratory exercises.
2.10 Chapter summary.
3 Formulation of mathematical models.
3.1 Notation.
3.2 Heat conduction.
3.3 The scalar elliptic boundary value problem.
3.4 Linear elasticity.
3.5 Incompressible elastic materials.
3.6 Stokes' flow.
3.7 The hierarchic view of mathematical models.
3.8 Chapter summary.
4 Generalized formulations.
4.1 The scalar elliptic problem.
4.2 The principle of virtual work.
4.3 Elastostatic problems.
4.4 Elastodynamic models.
4.5 Incompressible materials.
4.6 Chapter summary.
5 Finite element spaces.
5.1 Standard elements in two dimensions.
5.2 Standard polynomial spaces.
5.3 Shape functions.
5.4 Mapping functions in two dimensions.
5.5 Elements in three dimensions.
5.6 Integration and differentiation.
5.7 Stiffness matrices and load vectors.
5.8 Chapter summary.
6 Regularity and rates of convergence.
6.1 Regularity.
6.2 Classification.
6.3 The neighborhood of singular points.
6.4 Rates of convergence.
6.5 Chapter summary.
7 Computation and verification of data.
7.1 Computation of the solution and its first derivatives.
7.2 Nodal forces.
7.3 Verification of computed data.
7.4 Flux and stress intensity factors.
7.5 Chapter summary.
8 What should be computed and why?
8.1 Basic assumptions.
8.2 Conceptualization: drivers of damage accumulation.
8.3 Classical models of metal fatigue.
8.4 Linear elastic fracture mechanics.
8.5 On the existence of a critical distance.
8.6 Driving forces for damage accumulation.
8.7 Cycle counting.
8.8 Validation.
8.9 Chapter summary.
9 Beams, plates and shells.
9.1 Beams.
9.2 Plates.
9.3 Shells.
9.4 The Oak Ridge experiments.
9.5 Chapter summary.
10 Nonlinear models.
10.1 Heat conduction.
10.2 Solid mechanics.
10.3 Chapter summary.
A Definitions.
A.1 Norms and seminorms.
A.2 Normed linear spaces.
A.3 Linear functionals.
A.4 Bilinear forms.
A.5 Convergence.
A.6 Legendre polynomials.
A.7 Analytic functions.
A.8 The Schwarz inequality for integrals.
B Numerical quadrature.
B.1 Gaussian quadrature.
B.2 Gauss-Lobatto quadrature.
C Properties of the stress tensor.
C.1 The traction vector.
C.2 Principal stresses.
C.3 Transformation of vectors.
C.4 Transformation of stresses.
D Computation of stress intensity factors.
D.1 The contour integral method.
D.2 The energy release rate.
E Saint-Venant's principle.
E.1 Green's function for the Laplace equation.
E.2 Model problem.
F Solutions for selected exercises.
Bibliography.
Index.
