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Summary
Summary
This is the only book available that analyzes in depth the mathematical foundations of the finite element method. It is a valuable reference and introduction to current research on the numerical analysis of the finite element method, as well as a working textbook for graduate courses in numerical analysis. It includes many useful figures, and there are many exercises of varying difficulty.
Although nearly 25 years have passed since this book was first published, the majority of its content remains up-to-date. Chapters 1 through 6, which cover the basic error estimates for elliptic problems, are still the best available sources for material on this topic. The material covered in Chapters 7 and 8, however, has undergone considerable progress in terms of new applications of the finite element method; therefore, the author provides, in the Preface to the Classics Edition, a bibliography of recent texts that complement the classic material in these chapters.
Author Notes
Philippe G. Ciarlet is a Professor at the Laboratoire d'Analyse Numerique at the Universite Pierre et Marie Curie in Paris. He is also a member of the French Academy of Sciences
Table of Contents
Preface to the Classics Edition | p. xv |
Preface | p. xix |
General plan and interdependence table | p. xxvi |
1. Elliptic boundary value problems | p. 1 |
Introduction | p. 1 |
1.1. Abstract problems | p. 2 |
The symmetric case. Variational inequalities | p. 2 |
The nonsymmetric case. The Lax-Milgram lemma | p. 7 |
Exercises | p. 9 |
1.2. Examples of elliptic boundary value problems | p. 10 |
The Sobolev spaces H[superscript m] ([Omega]). Green's formulas | p. 10 |
First examples of second-order boundary value problems | p. 15 |
The elasticity problem | p. 23 |
Examples of fourth-order problems: The biharmonic problem, the plate problem | p. 28 |
Exercises | p. 32 |
Bibliography and Comments | p. 35 |
2. Introduction to the finite element method | p. 36 |
Introduction | p. 36 |
2.1. Basic aspects of the finite element method | p. 37 |
The Galerkin and Ritz methods | p. 37 |
The three basic aspects of the finite element method. Conforming finite element methods | p. 38 |
Exercises | p. 43 |
2.2. Examples of finite elements and finite element spaces | p. 43 |
Requirements for finite element spaces | p. 43 |
First examples of finite elements for second order problems: n-Simplices of type (k), (3') | p. 44 |
Assembly in triangulations. The associated finite element spaces | p. 51 |
n-Rectangles of type (k). Rectangles of type (2'), (3'). Assembly in triangulations | p. 55 |
First examples of finite elements with derivatives as degrees of freedom: Hermite n-simplices of type (3), (3'). Assembly in triangulations | p. 64 |
First examples of finite elements for fourth-order problems: the Argyris and Bell triangles, the Bogner-Fox-Schmit rectangle. Assembly in triangulations | p. 69 |
Exercises | p. 77 |
2.3. General properties of finite elements and finite element spaces | p. 78 |
Finite elements as triples (K, P, [Sigma]). Basic definitions. The P-interpolation operator | p. 78 |
Affine families of finite elements | p. 82 |
Construction of finite element spaces X[subscript h]. Basic definitions. The X[subscript h]-interpolation operator | p. 88 |
Finite elements of class l[superscript 0] and l[superscript 1] | p. 95 |
Taking into account boundary conditions. The spaces X[subscript 0h] and X[subscript 00h] | p. 96 |
Final comments | p. 99 |
Exercises | p. 101 |
2.4. General considerations on convergence | p. 103 |
Convergent family of discrete problems | p. 103 |
Cea's lemma. First consequences. Orders of convergence | p. 104 |
Bibliography and comments | p. 106 |
3. Conforming finite element methods for second order problems | p. 110 |
Introduction | p. 110 |
3.1. Interpolation theory in Sobolev spaces | p. 112 |
The Sobolev spaces W[superscript m,p]([Omega]). The quotient space W[superscript k+1,p]([Omega])/P[subscript k]([Omega]) | p. 112 |
Error estimates for polynomial preserving operators | p. 116 |
Estimates of the interpolation errors |v - [Pi subscript K]v|[subscript m,q,K] for affine families of finite elements | p. 122 |
Exercises | p. 126 |
3.2. Application to second-order problems over polygonal domains | p. 131 |
Estimate of the error [double vertical line]u - u[subscript h double vertical line subscript 1,[Omega] | p. 131 |
Sufficient conditions for lim[subscript h[right arrow]0 double vertical line]u - u[subscript h double vertical line subscript 1,[Omega] = 0 | p. 134 |
Estimate of the error | p. 136 |
Concluding remarks. Inverse inequalities | p. 139 |
Exercises | p. 143 |
3.3. Uniform convergence | p. 147 |
A model problem. Weighted semi-norms |.|[subscript [phi],m,[Omega] | p. 147 |
Uniform boundedness of the mapping u [right arrow] u[subscript h] with respect to appropriate weighted norms | p. 155 |
Estimates of the errors | p. 163 |
Exercises | p. 167 |
Bibliography and comments | p. 168 |
4. Other finite element methods for second-order problems | p. 174 |
Introduction | p. 174 |
4.1. The effect of numerical integration | p. 178 |
Taking into account numerical integration. Description of the resulting discrete problem | p. 178 |
Abstract error estimate: The first Strang lemma | p. 185 |
Sufficient conditions for uniform V[subscript h]-ellipticity | p. 187 |
Consistency error estimates. The Bramble-Hilbert lemma | p. 190 |
Estimate of the error [double vertical line]u - u[subscript h double vertical line subscript 1,[Omega] | p. 199 |
Exercises | p. 201 |
4.2. A nonconforming method | p. 207 |
Nonconforming methods for second-order problems. Description of the resulting discrete problem | p. 207 |
Abstract error estimate: The second Strang lemma | p. 209 |
An example of a nonconforming finite element: Wilson's brick | p. 211 |
Consistency error estimate. The bilinear lemma | p. 217 |
Estimate of the error ([Sigma subscript K[set membership]t subscript h] | p. 220 |
Exercises | p. 223 |
4.3. Isoparametric finite elements | p. 224 |
Isoparametric families of finite elements | p. 224 |
Examples of isoparametric finite elements | p. 227 |
Estimates of the interpolation errors |v - [Pi subscript K]v|[subscript m,q,K] | p. 230 |
Exercises | p. 243 |
4.4. Application to second order problems over curved domains | p. 248 |
Approximation of a curved boundary with isoparametric finite elements | p. 248 |
Taking into account isoparametric numerical integration. Description of the resulting discrete problem | p. 252 |
Abstract error estimate | p. 255 |
Sufficient conditions for uniform V[subscript h]-ellipticity | p. 257 |
Interpolation error and consistency error estimates | p. 260 |
Estimate of the error [double vertical line]u - u[subscript h double vertical line subscript 1,[Omega]h] | p. 266 |
Exercises | p. 270 |
Bibliography and comments | p. 272 |
Additional bibliography and comments | p. 276 |
Problems on unbounded domains | p. 276 |
The Stokes problem | p. 280 |
Eigenvalue problems | p. 283 |
5. Application of the finite element method to some nonlinear problems | p. 287 |
Introduction | p. 287 |
5.1. The obstacle problem | p. 289 |
Variational formulation of the obstacle problem | p. 289 |
An abstract error estimate for variational inequalities | p. 291 |
Finite element approximation with triangles of type (1). Estimate of the error [double vertical line]u - u[subscript h double vertical line subscript 1,[Omega] | p. 294 |
Exercises | p. 297 |
5.2. The minimal surface problem | p. 301 |
A formulation of the minimal surface problem | p. 301 |
Finite element approximation with triangles of type (1). Estimate of the error [double vertical line]u - u[subscript h double vertical line subscript 1,[Omega]h] | p. 302 |
Exercises | p. 310 |
5.3. Nonlinear problems of monotone type | p. 312 |
A minimization problem over the space W[superscript 1,p subscript 0]([Omega]), 2 [less than or equal] p, and its finite element approximation with n-simplices of type (1) | p. 312 |
Sufficient condition for lim[subscript h[right arrow]0 double vertical line]u - u[subscript h double vertical line subscript 1,p,[Omega] = 0 | p. 317 |
The equivalent problem Au = f. Two properties of the operator A | p. 318 |
Strongly monotone operators. Abstract error estimate | p. 321 |
Estimate of the error [double vertical line]u - u[subscript h double vertical line subscript 1,p,[Omega] | p. 324 |
Exercises | p. 324 |
Bibliography and comments | p. 325 |
Additional bibliography and comments | p. 330 |
Other nonlinear problems | p. 330 |
The Navier-Stokes problem | p. 331 |
6. Finite element methods for the plate problem | p. 333 |
Introduction | p. 333 |
6.1. Conforming methods | p. 334 |
Conforming methods for fourth-order problems | p. 334 |
Almost-affine families of finite elements | p. 335 |
A "polynomial" finite element of class l[superscript 1]: The Argyris triangle | p. 336 |
A composite finite element of class l[superscript 1]: The Hsieh-Clough-Tocher triangle | p. 340 |
A singular finite element of class l[superscript 1]: The singular Zienkiewicz triangle | p. 347 |
Estimate of the error [double vertical line]u - u[subscript h double vertical line subscript 2,[Omega] | p. 352 |
Sufficient conditions for lim[subscript h[right arrow]0 double vertical line]u - u[subscript h double vertical line subscript 2,[Omega] = 0 | p. 354 |
Conclusions | p. 354 |
Exercises | p. 356 |
6.2. Nonconforming methods | p. 362 |
Nonconforming methods for the plate problem | p. 362 |
An example of a nonconforming finite element: Adini's rectangle | p. 364 |
Consistency error estimate. Estimate of the error ([Sigma subscript K[set membership]t subscript h] | p. 367 |
Further results | p. 373 |
Exercises | p. 374 |
Bibliography and comments | p. 376 |
7. A mixed finite element method | p. 381 |
Introduction | p. 381 |
7.1. A mixed finite element method for the biharmonic problem | p. 383 |
Another variational formuiation of the biharmonic problem | p. 383 |
The corresponding discrete problem. Abstract error estimate | p. 386 |
Estimate of the error ( | p. 390 |
Concluding remarks | p. 391 |
Exercise | p. 392 |
7.2. Solution of the discrete problem by duality techniques | p. 395 |
Replacement of the constrained minimization problem by a saddlepoint problem | p. 395 |
Use of Uzawa's method. Reduction to a sequence of discrete Dirichlet problems for the operator - [Delta] | p. 399 |
Convergence of Uzawa's method | p. 402 |
Concluding remarks | p. 403 |
Exercises | p. 404 |
Bibliography and comments | p. 406 |
Additional bibliography and comments | p. 407 |
Primal, dual and primal-dual formulations | p. 407 |
Displacement and equilibrium methods | p. 412 |
Mixed methods | p. 414 |
Hybrid methods | p. 417 |
An attempt of general classification of finite element methods | p. 421 |
8. Finite element methods for shells | p. 425 |
Introduction | p. 425 |
8.1. The shell problem | p. 426 |
Geometrical preliminaries. Koiter's model | p. 426 |
Existence of a solution. Proof for the arch problem | p. 431 |
Exercises | p. 437 |
8.2. Conforming methods | p. 439 |
The discrete problem. Approximation of the geometry. Approximation of the displacement | p. 439 |
Finite element methods conforming for the displacements | p. 440 |
Consistency error estimates | p. 443 |
Abstract error estimate | p. 447 |
Estimate of the error ([Sigma superscript 2 subscript [alpha] = 1] [double vertical line]u[subscript [alpha] - u[subscript [alpha]h double vertical line superscript 2 subscript 1,[Omega] + [double vertical line]u[subscript 3] - u[subscript 3h double vertical line superscript 2 subscript 2,[Omega])[superscript 1/2] | p. 448 |
Finite element methods conforming for the geometry | p. 450 |
Conforming finite element methods for shells | p. 450 |
8.3. A nonconforming method for the arch problem | p. 451 |
The circular arch problem | p. 451 |
A natural finite element approximation | p. 452 |
Finite element methods conforming for the geometry | p. 453 |
A finite element method which is not conforming for the geometry. Definition of the discrete problem | p. 453 |
Consistency error estimates | p. 461 |
Estimate of the error ( | p. 465 |
Exercise | p. 466 |
Bibliography and comments | p. 466 |
Epilogue: Some "real-life" finite element model examples | p. 469 |
Bibliography | p. 481 |
Glossary of symbols | p. 512 |
Index | p. 521 |