Author: Luis Manuel Braga da Costa CamposPublish On: 2019-11-05

This third book consists of two chapters (chapters 5 and 6 of the set). The first chapter in this book concerns non-linear differential equations of the second and higher orders.

Author: Luis Manuel Braga da Costa Campos

Publisher: CRC Press

ISBN: 9780429644177

Category: Mathematics

Page: 363

View: 697

Higher-Order Differential Equations and Elasticity is the third book within Ordinary Differential Equations with Applications to Trajectories and Vibrations, Six-volume Set. As a set, they are the fourth volume in the series Mathematics and Physics Applied to Science and Technology. This third book consists of two chapters (chapters 5 and 6 of the set). The first chapter in this book concerns non-linear differential equations of the second and higher orders. It also considers special differential equations with solutions like envelopes not included in the general integral. The methods presented include special differential equations, whose solutions include the general integral and special integrals not included in the general integral for myriad constants of integration. The methods presented include dual variables and differentials, related by Legendre transforms, that have application in thermodynamics. The second chapter concerns deformations of one (two) dimensional elastic bodies that are specified by differential equations of: (i) the second-order for non-stiff bodies like elastic strings (membranes); (ii) fourth-order for stiff bodies like bars and beams (plates). The differential equations are linear for small deformations and gradients and non-linear otherwise. The deformations for beams include bending by transverse loads and buckling by axial loads. Buckling and bending couple non-linearly for plates. The deformations depend on material properties, for example isotropic or anisotropic elastic plates, with intermediate cases such as orthotropic or pseudo-isotropic. Discusses differential equations having special integrals not contained in the general integral, like the envelope of a family of integral curves Presents differential equations of the second and higher order, including non-linear and with variable coefficients Compares relation of differentials with the principles of thermodynamics Describes deformations of non-stiff elastic bodies like strings and membranes and buckling of stiff elastic bodies like bars, beams, and plates Presents linear and non-linear waves in elastic strings, membranes, bars, beams, and plates

Author: Luis Manuel Braga da Costa CamposPublish On: 2019-11-20

Volume IV (Ordinary Differential Equations with Applications to Trajectories and
Oscillations) is organized like the ... Equations and Dynamical Systems; and the
third book, Higher-Order Differential Equations and Elasticity of volume IV, ...

Author: Luis Manuel Braga da Costa Campos

Publisher: CRC Press

ISBN: 9780429638589

Category: Mathematics

Page: 299

View: 516

Simultaneous Differential Equations and Multi-Dimensional Vibrations is the fourth book within Ordinary Differential Equations with Applications to Trajectories and Vibrations, Six-volume Set. As a set, they are the fourth volume in the series Mathematics and Physics Applied to Science and Technology. This fourth book consists of two chapters (chapters 7 and 8 of the set). The first chapter concerns simultaneous systems of ordinary differential equations and focuses mostly on the cases that have a matrix of characteristic polynomials, namely linear systems with constant or homogeneous power coefficients. The method of the matrix of characteristic polynomials also applies to simultaneous systems of linear finite difference equations with constant coefficients. The second chapter considers linear multi-dimensional oscillators with any number of degrees of freedom including damping, forcing, and multiple resonance. The discrete oscillators may be extended from a finite number of degrees-of-freedom to infinite chains. The continuous oscillators correspond to waves in homogeneous or inhomogeneous media, including elastic, acoustic, electromagnetic, and water surface waves. The combination of propagation and dissipation leads to the equations of mathematical physics. Presents simultaneous systems of ordinary differential equations and their elimination for a single ordinary differential equation Includes cases with a matrix of characteristic polynomials, including simultaneous systems of linear differential and finite difference equations with constant coefficients Covers multi-dimensional oscillators with damping and forcing, including modal decomposition, natural frequencies and coordinates, and multiple resonance Discusses waves in inhomogeneous media, such as elastic, electromagnetic, acoustic, and water waves Includes solutions of partial differential equations of mathematical physics by separation of variables leading to ordinary differential equations

Ti-Jun Xiao, Jin Liang. G. Chen and D. L. Russell [ 1 ] A mathematical model for
linear elastic systems with structural damping , Quart . ... Clément and J. Prūss [ 1
] On second order differential equations in Hilbert space , Boll . Un . Mat . Ital .

Author: Ti-Jun Xiao

Publisher: Springer Science & Business Media

ISBN: 3540652388

Category: Mathematics

Page: 300

View: 393

This book is a valuable resource for scientists and engineers in differential equations, analysis and functional analysis, mathematical physics, control theory, mechanics and engineering, and for graduate students in these disciplines.

1 we have presented a higher - order solution of the crack tip fields in the
homogeneous pressure - sensitive materials and ... The consequent governing differential equations subjected to the firstand the second - order solutions for the
...

Author: Huang Yuan

Publisher: Springer Science & Business Media

ISBN: 3540433368

Category: Technology & Engineering

Page: 311

View: 422

In this book a systematic discussion of crack problems in elastic-plastic materials is presented. The state of the art in fracture mechanics research and assessment of cracks is documented, with the help of analytic, asymptotic methods as well as finite element computations. After a brief introduction to fracture mechanics, the two-parameter concept for stationary cracks is studied in addition to the issues in three-dimensional crack fields under coupling with strong out-of-plane effects. Cracks along interfaces and crack growth problems under mixed mode conditions are also treated. A systematic study of stress singularities for different notches is accompanied by detailed finite element computations.

A class of collocation methods based on B-spline approximations is proposed for
solving equations of linear elasticity. Methods can be easily implemented and
provide a high order accuracy at low cost due to the nature of both B-spline ...

P. D ̈orsek and J.M. Melenk Abstract method for the primal formulation of
frictional contact in linear elasticity. ... Spectral and High Order Methods for Partial Differential Equations, Lecture Notes in Computational Science and Engineering
76, ...

Author: Jan S. Hesthaven

Publisher: Springer Science & Business Media

ISBN: 3642153372

Category: Mathematics

Page: 510

View: 648

The book contains a selection of high quality papers, chosen among the best presentations during the International Conference on Spectral and High-Order Methods (2009), and provides an overview of the depth and breadth of the activities within this important research area. The carefully reviewed selection of the papers will provide the reader with a snapshot of state-of-the-art and help initiate new research directions through the extensive bibliography.

The text of discussion on elasticity of quasicrystals and some applications is
ended till the Chapter 15. ... solutions of elasticity of quasicrystals promote the
development of partial differential equations of higher order, applied complex
analysis, ...

Author: Tianyou Fan

Publisher: Springer Science & Business Media

ISBN: 9783642146435

Category: Technology & Engineering

Page: 350

View: 534

This inter-disciplinary work covering the continuum mechanics of novel materials, condensed matter physics and partial differential equations discusses the mathematical theory of elasticity of quasicrystals (a new condensed matter) and its applications by setting up new partial differential equations of higher order and their solutions under complicated boundary value and initial value conditions. The new theories developed here dramatically simplify the solving of complicated elasticity equation systems. Large numbers of complicated equations involving elasticity are reduced to a single or a few partial differential equations of higher order. Systematical and direct methods of mathematical physics and complex variable functions are developed to solve the equations under appropriate boundary value and initial value conditions, and many exact analytical solutions are constructed. The dynamic and non-linear analysis of deformation and fracture of quasicrystals in this volume presents an innovative approach. It gives a clear-cut, strict and systematic mathematical overview of the field. Comprehensive and detailed mathematical derivations guide readers through the work. By combining mathematical calculations and experimental data, theoretical analysis and practical applications, and analytical and numerical studies, readers will gain systematic, comprehensive and in-depth knowledge on continuum mechanics, condensed matter physics and applied mathematics.

... of the split-operator technique previously employed in quantum mechanics to
solve the time-dependent Schrodinger equation. ... INTRODUCTION The goal of
this work is to look for an efficient numerical integration scheme to solve the second order differential equation which defines the sound propagation ... IUTAM
Symposium on Diffraction and Scattering in Fluid Mechanics and Elasticity, 107-1
14.

Author: I. David Abrahams

Publisher: Springer Science & Business Media

ISBN: 1402005903

Category: Science

Page: 353

View: 524

These Conference Proceedings are intended to summarise the latest developments in diffraction and scattering theory as reported at the IU TAM Symposium on Diffraction and Scattering in Fluid Mechanics and Elasticity held in Manchester, England on 16-20 July 2000. This in formal meeting was organised to discuss mathematical advances, both from the theoretical and more applied points of view. However, its pri mary goal was to bring together groups of researchers working in dis parate application areas, but who nevertheless share common models, phenomenological features arising in such problems, and common math ematical tools. To this end, we were delighted to have four Plenary Speakers, Professors Allan Pierce, Ed Kerschen, Roger Grimshaw and John Willis FRS, who are undisputed leaders in the four thematic ar eas of our meeting (these are respectively acoustics, aeroacoustics, water or other free surface waves, elasticity). These Proceedings should offer an excellent vehicle for continuing the dialogue between these groups of researchers. The participants were invited because of their expertise and recent contributions to this field. Collectively, there were around 90 contrib utors to the Symposium from some 13 countries located all around the world. These included 45 speakers, 35 co-authors and about 10 other delegates. Individuals came from many of the major international cen tres of excellence in the field of scattering theory.

Partial differential equations of the second- and higher-order are encountered in
a number of areas of importance to ... of problems in plane elasticity and in the
flow of viscous fluids, the fourth-order partial differential equations associated
with ...

Author: A.P.S. Selvadurai

Publisher: Springer Science & Business Media

ISBN: 9783662040065

Category: Technology & Engineering

Page: 596

View: 666

This two-volume work focuses on partial differential equations (PDEs) with important applications in mechanical and civil engineering, emphasizing mathematical correctness, analysis, and verification of solutions. The presentation involves a discussion of relevant PDE applications, its derivation, and the formulation of consistent boundary conditions.

Systems of partial differential equations , on the other hand , are an altogether
different matter . Efforts to derive a suitable generalization of the remarkably
powerful and simple results of scalar second - order operators to higherorder
systems ...

Author: Remigio Russo

Publisher: World Scientific

ISBN: 9810225768

Category: Mathematics

Page: 185

View: 136

In this volume, five papers are collected that give a good sample of the problems and the results characterizing some recent trends and advances in this theory. Some of them are devoted to the improvement of a general abstract knowledge of the behavior of elastic bodies, while the others mainly deal with more applicative topics.

Another family of enriched continuum models is the gradient elasticity models
where the constitutive law also depends on the ... With respect to the Euler-
Bernoulli model, the fourth-order differential equation is then converted into a
sixth-order ...

Author: Isaac Elishakoff

Publisher: John Wiley & Sons

ISBN: 9781118565889

Category: Technology & Engineering

Page: 448

View: 414

The main properties that make carbon nanotubes (CNTs) a promising technology for many future applications are: extremely high strength, low mass density, linear elastic behavior, almost perfect geometrical structure, and nanometer scale structure. Also, CNTs can conduct electricity better than copper and transmit heat better than diamonds. Therefore, they are bound to find a wide, and possibly revolutionary use in all fields of engineering. The interest in CNTs and their potential use in a wide range of commercial applications; such as nanoelectronics, quantum wire interconnects, field emission devices, composites, chemical sensors, biosensors, detectors, etc.; have rapidly increased in the last two decades. However, the performance of any CNT-based nanostructure is dependent on the mechanical properties of constituent CNTs. Therefore, it is crucial to know the mechanical behavior of individual CNTs such as their vibration frequencies, buckling loads, and deformations under different loadings. This title is dedicated to the vibration, buckling and impact behavior of CNTs, along with theory for carbon nanosensors, like the Bubnov-Galerkin and the Petrov-Galerkin methods, the Bresse-Timoshenko and the Donnell shell theory.

The possibility of obtaining higher order approximations to the classical theory of elasticity is indicated . In such cases the order of the differential equations
becomes higher , and the number of boundary conditions becomes greater .

Equations involving partial derivatives are called partial differential equations (
PDEs). ... Nowadays, higher-order elements are becoming increasingly popular
due to their excellent approximation properties and capability to reduce the size
of ...

Author: Pavel Ŝolín

Publisher: John Wiley & Sons

ISBN: 9780471764090

Category: Mathematics

Page: 512

View: 450

A systematic introduction to partial differential equations and modern finite element methods for their efficientnumerical solution Partial Differential Equations and the Finite Element Methodprovides a much-needed, clear, and systematic introduction tomodern theory of partial differential equations (PDEs) and finiteelement methods (FEM). Both nodal and hierachic concepts of the FEMare examined. Reflecting the growing complexity and multiscalenature of current engineering and scientific problems, the authoremphasizes higher-order finite element methods such as the spectralor hp-FEM. A solid introduction to the theory of PDEs and FEM contained inChapters 1-4 serves as the core and foundation of the publication.Chapter 5 is devoted to modern higher-order methods for thenumerical solution of ordinary differential equations (ODEs) thatarise in the semidiscretization of time-dependent PDEs by theMethod of Lines (MOL). Chapter 6 discusses fourth-order PDEs rootedin the bending of elastic beams and plates and approximates theirsolution by means of higher-order Hermite and Argyris elements.Finally, Chapter 7 introduces the reader to various PDEs governingcomputational electromagnetics and describes their finite elementapproximation, including modern higher-order edge elements forMaxwell's equations. The understanding of many theoretical and practical aspects of bothPDEs and FEM requires a solid knowledge of linear algebra andelementary functional analysis, such as functions and linearoperators in the Lebesgue, Hilbert, and Sobolev spaces. Thesetopics are discussed with the help of many illustrative examples inAppendix A, which is provided as a service for those readers whoneed to gain the necessary background or require a refreshertutorial. Appendix B presents several finite element computationsrooted in practical engineering problems and demonstrates thebenefits of using higher-order FEM. Numerous finite element algorithms are written out in detailalongside implementation discussions. Exercises, including manythat involve programming the FEM, are designed to assist the readerin solving typical problems in engineering and science. Specifically designed as a coursebook, this student-testedpublication is geared to upper-level undergraduates and graduatestudents in all disciplines of computational engineeringandscience. It is also a practical problem-solving reference forresearchers, engineers, and physicists.

Positivity Preserving and Nonlinear Higher Order Elliptic Equations in Bounded
Domains Filippo Gazzola, ... In Section 1.8 we come back to this issue of
modeling thin elastic plates where the full nonlinear differential geometric
expressions ...

Author: Filippo Gazzola

Publisher: Springer Science & Business Media

ISBN: 9783642122446

Category: Mathematics

Page: 423

View: 301

This accessible monograph covers higher order linear and nonlinear elliptic boundary value problems in bounded domains, mainly with the biharmonic or poly-harmonic operator as leading principal part. It provides rapid access to recent results and references.

5-8 Higher - order equations in elasticity and vibrations Many of the equations of
science and engineering are of order higher than 2 . In plane elasticity one meets
the ( fourth - order ) biharmonic equation , Vou = 0 ; in the vibration of a thin ...

It is well known that the third order KdV equation is the generic model for studying
weakly nonlinear waves. ... The KdV equation is completely integrable and the
collision between solitary waves is elastic, which means that the solitons retain ...

Author: Abdul-Majid Wazwaz

Publisher: Springer Science & Business Media

ISBN: 9783642002519

Category: Mathematics

Page: 700

View: 641

"Partial Differential Equations and Solitary Waves Theory" is a self-contained book divided into two parts: Part I is a coherent survey bringing together newly developed methods for solving PDEs. While some traditional techniques are presented, this part does not require thorough understanding of abstract theories or compact concepts. Well-selected worked examples and exercises shall guide the reader through the text. Part II provides an extensive exposition of the solitary waves theory. This part handles nonlinear evolution equations by methods such as Hirota’s bilinear method or the tanh-coth method. A self-contained treatment is presented to discuss complete integrability of a wide class of nonlinear equations. This part presents in an accessible manner a systematic presentation of solitons, multi-soliton solutions, kinks, peakons, cuspons, and compactons. While the whole book can be used as a text for advanced undergraduate and graduate students in applied mathematics, physics and engineering, Part II will be most useful for graduate students and researchers in mathematics, engineering, and other related fields. Dr. Abdul-Majid Wazwaz is a Professor of Mathematics at Saint Xavier University, Chicago, Illinois, USA.

(10.2) The governing differential equations which the displacements must satisfy
can then be obtained by substituting (10.2) into (10.1)5, i.e., Ciskluk.lj – 6;Tj = 0. (
10.3) Since (10.1)2 is a homogeneous second-order differential equation, ...

Author: Chyanbin Hwu

Publisher: Springer Science & Business Media

ISBN: 9781441959157

Category: Technology & Engineering

Page: 673

View: 619

As structural elements, anisotropic elastic plates find wide applications in modern technology. The plates here are considered to be subjected to not only inplane load but also transverse load. In other words, both plane and plate bending problems as well as the stretching-bending coupling problems are all explained in this book. In addition to the introduction of the theory of anisotropic elasticity, several important subjects have are discussed in this book such as interfaces, cracks, holes, inclusions, contact problems, piezoelectric materials, thermoelastic problems and boundary element analysis.

CHAPTER 5 Solution of Differential Equations : Initial Value Problems The
recursive equations for the transmission ... As mentioned earlier , a second - order differential equation may be generated from the first - order equation to use
the ...

Author: Applied Mathematics Symposium Staff Ruel Vance Churchill Eric Reissner Abraham Haskel Taub American Mathematical SocietyPublish On: 1950-12-31

KIRCHHOFF'S BOUNDARY CONDITIONS AND THE EDGE EFFECT FOR ELASTIC PLATES K. O. FRIEDRICHS ... by a differential equation of the fourth order, and hence only two, instead of three, boundary conditions can be imposed
.

Author: Applied Mathematics Symposium Staff Ruel Vance Churchill Eric Reissner Abraham Haskel Taub American Mathematical Society