Continuum Mechanics Through the Ages - from the Renaissance to the Twentieth Century from Hydraulics to Plasticity Solid Mechanics and Its Applications
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Direct Derivation of Liénard–Wiechert Potentials, Maxwell's
Direct derivation of Li´enard{Wiechert potentials, Maxwell's equations and Lorentz force from Coulomb's law Hrvoje Dodig∗ University of Split, Rudera Boˇskovi´ca37, 21000 Split, Croatia Abstract In 19th century Maxwell derived famous Maxwell equations from the knowledge of three experimental physical laws: the electrostatic Coulomb's law, Ampere's force law and Faraday's law of induction. However, theoretical basis for Ampere's force law and Fara- day's law remains unknown to this day. Furthermore, the Lorentz force is considered as summary of experimental phenomena, the theoretical foundation that explains genera- tion of this force is still unknown. To answer these fundamental theoretical questions, in this paper we derive relativisti- cally correct Li´enard{ Wiechert potentials, Maxwell's equations and Lorentz force from two simple postulates: (a) when all charges are at rest the Coulomb's force acts between the charges, and (b) that disturbances caused by charge in motion propagate away from the source with finite velocity. The special relativity was not used in our derivations nor the Lorentz transformation. In effect, it was shown in this paper that all the electrody- namic laws, including the Lorentz force, can be derived from Coulomb's law and time retardation. This was accomplished by analysis of hypothetical experiment where test charge is at rest and where previously moving source charge stops at some time in the past. Then the generalized Helmholtz decomposition theorem, also derived in this paper, was applied to reformulate Coulomb's force acting at present time as the function of positions of source charge at previous time when the source charge was moving. -
Vector Calculus and Multiple Integrals Rob Fender, HT 2018
Vector Calculus and Multiple Integrals Rob Fender, HT 2018 COURSE SYNOPSIS, RECOMMENDED BOOKS Course syllabus (on which exams are based): Double integrals and their evaluation by repeated integration in Cartesian, plane polar and other specified coordinate systems. Jacobians. Line, surface and volume integrals, evaluation by change of variables (Cartesian, plane polar, spherical polar coordinates and cylindrical coordinates only unless the transformation to be used is specified). Integrals around closed curves and exact differentials. Scalar and vector fields. The operations of grad, div and curl and understanding and use of identities involving these. The statements of the theorems of Gauss and Stokes with simple applications. Conservative fields. Recommended Books: Mathematical Methods for Physics and Engineering (Riley, Hobson and Bence) This book is lazily referred to as “Riley” throughout these notes (sorry, Drs H and B) You will all have this book, and it covers all of the maths of this course. However it is rather terse at times and you will benefit from looking at one or both of these: Introduction to Electrodynamics (Griffiths) You will buy this next year if you haven’t already, and the chapter on vector calculus is very clear Div grad curl and all that (Schey) A nice discussion of the subject, although topics are ordered differently to most courses NB: the latest version of this book uses the opposite convention to polar coordinates to this course (and indeed most of physics), but older versions can often be found in libraries 1 Week One A review of vectors, rotation of coordinate systems, vector vs scalar fields, integrals in more than one variable, first steps in vector differentiation, the Frenet-Serret coordinate system Lecture 1 Vectors A vector has direction and magnitude and is written in these notes in bold e.g. -
The Helmholtz Decomposition of Decreasing and Weakly Increasing Vector Fields
The Helmholtz’ decomposition of decreasing and weakly increasing vector fields D. Petrascheck and R. Folk Institute for Theoretical Physics University Linz Altenbergerstr. 69, Linz, Austria Abstract Helmholtz’ decomposition theorem for vector fields is presented usually with too strong restric- tions on the fields. Based on the work of Blumenthal of 1905 it is shown that the decomposition of vector fields is not only possible for asymptotically weakly decreasing vector fields, but even for vector fields, which asymptotically increase sublinearly. Use is made of a regularization of the Green’s function and the mathematics of the proof is formulated as simply as possible. We also show a few examples for the decomposition of vector fields including the electric dipole radiation. Keywords: Helmholtz theorem, vector field, electromagnetic radiation arXiv:1506.00235v2 [physics.class-ph] 14 Oct 2015 1 I. INTRODUCTION According to the Helmholtz’ theorem one can decompose a given vector field ~v(~x) into a sum of two vector fields ~vl(~x) and ~vt(~x) where ~vl is irrotational (curl-free) and ~vt solenoidal (divergence-free), if the vector field fulfills certain conditions on continuity and asymptotic decrease (r ). Here ~x is the position vector in three-dimensional space and r = ~x its →∞ | | absolute value. The two parts of the vector field can be expressed as gradient of a scalar potential and curl of a vector potential, respectively. Concerning the validity, the uniqueness of the decomposition and the existence of the respective potentials one finds different conditions. The fundamental theorem for vector fields is historically based on Helmholtz’ work on vortices1,2 and therefore also known as Helmholtz’ decomposition theorem. -
ME 285A: Foundations of the Theory of Continuous Media
University of California, Berkeley Department of Mechanical Engineering ME 285A: Foundations of the Theory of Continuous Media Syllabus 1. Introduction. The nonlinear field theories. Mathematical preliminaries. Tensors. Fréchet derivative and differential. 2. Kinematics of Deformable Continua. Bodies. Deformations. Polar decomposition theorem. Derivatives of stretch and rotation tensors. Velocity and vorticity fields. Pull-back and push- forward operations. Lie derivative. Material transport of fields. Internal constraints. Relative deformation gradient. Rivlin-Ericksen tensors. 3. Balance Laws. Conservation of mass. Balance of linear and angular momenta for continua. Stress tensors. Balance of energy. A remark on the second law of thermodynamics. 4. General Constitutive Relations (Purely Mechanical Theory). Relationship between stress and history of deformation. Invariance requirements. Simple materials. Symmetry considerations. Cauchy-elastic and Green-elastic (or hyperelastic) materials. Internally constrained elastic materials. Viscous fluids. Materials with memory. Viscoelastic fluids and solids. Reiner-Rivlin fluids. Rivlin-Ericksen fluids. Materials with fading memory. Linear viscoelasticity. Pseudo-Rigid materials. 5. Thermoelastic Materials. Ideal gas. Entropy and Helmholtz free energy functions. Clausius- Duhem inequality. Thermoelasticity. Approach of Coleman and Noll. Approach of Rivlin: construction of entropy function. Internally constrained thermoelatic materials. Linear thermoelasticity. 6. Thermoelastic Materials with Viscosity. Construction of the entropy function for thermoelastic materials with viscosity, and subject to internal constraints. 7. Thermodynamics of Materials with Memory. Materials with fading memory. Instantaneous elasticity. Open questions. 8. Selected Topics. Mixture theory, nonlocal continua. ______________________________________________________________________________ Grading scheme: Homework (~40%), Midterm (~20%), Final Project (~40%). . -
Paul Langevin (1872-1946), La Relativité Et Les Quanta, Bulletin De La Société Française De Physique, N° 119, Mai 1999, 15-20
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Hal-Diderot M ICHEL P ATY LANGEVIN, LA RELATIVITE ET LES QUANTA 1 Paul Langevin (1872-1946), la relativité et les quanta, Bulletin de la Société Française de Physique, n° 119, mai 1999, 15-20. Paul Langevin (1872-1946), la relativité et les quanta Michel PATY* Formation et profil scientifique: entre l'expérience et la théorie.- Les nouveaux phénomènes sur la constitution des corps et le «fondement électromagnétique de la matière» - La théorie de la relativité restreinte interprétée comme dynamique électromagnétique. Les phénomènes quantiques.- L'interprétation de la mécanique quantique.- Mémoire de Langevin. “Résumer l'œuvre de Langevin, écrivait Louis de Broglie en 1947, c'est reprendre toute l'histoire de la physique depuis cinquante ans” 1. Aussi bien telle n'est pas l'intention de cet article. Mais cette remarque de son célèbre élève est propre à rappeler d'emblée la dimension de ce physicien considérable, qui était l'une des meilleures et des plus sûres têtes pensantes de son époque, et d'ailleurs pas seulement en physique. Mais c'est à la physique que nous nous limiterons ici, et même à l'évocation d'un aspect relativement circonscrit de son histoire: comment, et en quoi, ce physicien clairvoyant et profond que fut Paul Langevin s'est-il trouvé amené à prendre sa part des renouvellements radicaux qui ont transformé la physique au début du XXè siècle, à savoir la relativité et les quanta. Il nous faut commencer par rappeler quelques éléments de sa biographie, et surtout de sa formation2. -
Sur Ma Généalogie Scientifique Française
Sur ma g´en´ealogie scientifique fran¸caise Didier Henrion Octobre 2010 1 Motivation Durant l'´et´e2010 j'ai effectu´equelques recherches sur ma g´en´ealogiescientifique, afin de compl´eterla base de donn´ees[Mathematics Genealogy Project]. Dans ce document j'ai regroup´equelques informations sur le profil des scientifiques constituant ma branche g´en´ealogiquefran¸caise. Le 12 octobre 1999 j'ai obtenu ma th`esede doctorat fran¸caise[Henrion, 1999] de l'Institut National des Sciences Appliqu´ees(INSA) de Toulouse, devant un jury constitu´ede Christian Burgat (pr´esident), Luc Dugard, Michel Malabre (rapporteurs), Jacques Bernussou, Vladim´ırKuˇcera,Bernard Pradin (examinateurs) et Sophie Tar- bouriech (directrice de th`ese).Les travaux de th`esecombinaient des r´esultatsd'automatique dans la lign´ee des travaux d'Aleksandr Lyapunov (chercheur russe du d´ebutdu XX`emesi`ecle,contemporain d'Henri Poin- car´e,et pr´ecurseurde l'´etudedes syst`emesdynamiques), pour ´etudierla stabilit´ede syst`emeslin´eairesdont les actionneurs saturent, et des r´esultatsd'optimisation convexe et de math´ematiquesappliqu´ees,concernant les in´egalit´esmatricielles lin´eaires,particuli`erement adapt´ees`ala commande des syst`emesen pr´esenced'incertitudes param´etriqueset de mod´elisation. On notera la pr´esencedans le jury de th`esede Bernard Pradin, alors professeur d'automatique `al'INSA de Toulouse. Ses cours, ainsi que ceux de Germain Garcia, Christian Mira et Andr´eTitli, sont `al'origine de ma vocation. En 1998 j'ai ´egalement obtenu un doctorat de l'Acad´emiedes Sciences de la R´epubliqueTch`eque,mais je compte d´ecrirema g´en´ealogietch`equedans un autre document. -
Polymer Rheology: Principles, Techniques and Applications
Polymer Rheology: Principles, Techniques and Applications G. C. Berry Carnegie Mellon University Contents Example Problem............................................................................................. i 1. Introduction ..................................................................................................... 1 2. Principles of Rheometry .................................................................................. 3 3. Linear viscoelastic phenomenology.................................................................. 7 4. Approximations used in linear viscoelasticity................................................... 19 5. The viscosity of dilute of polymer solutions and colloidal dispersions.............. 24 6. Linear viscoelastic behavior of concentrated and undiluted polymeric fluids.... 29 7. Nonlinear viscoelastic behavior of concentrated and undiluted polymeric 35 fluids................................................................................................................ 8. Strain-induced birefringence for concentrated and undiluted polymeric fluids.. 43 9. Linear and nonlinear viscoelastic behavior of colloidal dispersions .................. 55 10. References ....................................................................................................... 59 Table 1 Linear Viscoelastic Function..................................................................... 68 Table 2 Functions and Parameters Used................................................................. 69 Table 3 Relations -
Thermomechanics of Solid Materials with Application to the Gurson-Tvergaard Material Model
VTT PUBLICATIONS 312 F19800095 Thermomechanics of solid materials with application to the Gurson-Tvergaard material model Kari Santaoja VlT Manufacturing Technology . TECHNICAL RESEARCH CENTRE OF FINLAND ESP00 1997 312 Kari Santaoja Thermomechanics of solid materials with application to the Gurson-Tvergaard material model TECHNICAL RESEARCH CENTRE OF FINLAND ESP00 1997 ISBN 951-38-5060-9 (soft back ed.) ISSN 123.54621 (soft back ed.) ISBN 95 1-38-5061-7 (URL: http://www.inf.vtt.fi/pdf/) ISSN 14554849 (URL: http://www.inf.vtt.fi/pdf/) Copyright 0 Valtion teknillinen tutkimuskeskus (VTT) 1997 JULKAISIJA - UTGIVARE - PUBLISHER Valtion teknillinen tutkimuskeskus (VTT), Vuorimiehentie 5, PL 2000, 02044 VTT puh. vaihde (09) 4561, faksi (09) 456 4374 Statens tekniska forskningscentral (VTT), Bergsmansvagen 5, PB 2000,02044 VTT tel. vaxel(O9) 4561, fax (09) 456 4374 Technical Research Centre of Finland (VTT), Vuorimiehentie 5, P.O.Box 2000, FIN42044 VTT, Finland phone internat. + 358 9 4561, fax + 358 9 456 4374 VIT Valmistustekniikka, Ydinvoimalaitosten materiaalitekniikka, Kemistintie 3, PL 1704,02044 VTT puh. vaihde (09) 4561, faksi (09) 456 7002 VTT Tillverkningsteknik, Material och strukturell integritet, Kemistvagen 3, PB 1’704,02044 VTT tel. vaxel(O9) 4561, fax (09) 456 7002 VTT Manufacturing Technology, Maaterials and Structural Integrity, Kemistintie 3, P.O.Box 1704, FIN42044 VTT, Finland phone internat. + 358 9 4561, fax + 358 9 456 7002 Technical editing Kerttu Tirronen VTT OFFSETPAINO. ESP00 1997 Santaoja, Kari. Thermornechanics of solid materials with application to the Gurson-Tvergaard material model. Espoo 1997. Technical Research Centre of Finland, UTPublications 312. 162 p. + app. 14 p. UDC 536.7 Keywords thermomechanical analysis, thermodynamics, plasticity, porous medium, Gurson- Tvergaard model ABSTRACT The elastic-plastic material model for porous material proposed by Gurson and Tvergaard is evaluated. -
Course Material
SREENIVASA INSTITUTE of TECHNOLOGY and MANAGEMENT STUDIES (autonomous) (ENGINEERING MATHEMATICS-III) Course Material II- B.TECH / I - SEMESTER regulation: r18 Course Code: 18SAH211 Compiled by Department OF MATHEMATICS Unit-I: Numerical Integration Source:https://www.intmath.com/integration/integration-intro.php Numerical Integration: Simpson’s 1/3- Rule Note: While applying the Simpson’s 1/3 rule, the number of sub-intervals (n) should be taken as multiple of 2. Simpson’s 3/8- Rule Note: While applying the Simpson’s 3/8 rule, the number of sub-intervals (n) should be taken as multiple of 3. Numerical solution of ordinary differential equations Taylor’s Series Method Picard’s Method Euler’s Method Runge-Kutta Formula UNIT-II Multiple Integrals 1. Double Integration Evaluation of Double Integration Triple Integration UNIT-III Partial Differential Equations Partial differential equations are those equations which contain partial differential coefficients, independent variables and dependent variables. The independent variables are denoted by x and y and dependent variable by z. the partial differential coefficients are denoted as follows The order of the partial differential equation is the same as that of the order of the highest differential coefficient in it. UNIT-IV Vector Differentiation Elementary Vector Analysis Definition (Scalar and vector): Scalar is a quantity that has magnitude but not direction. For instance mass, volume, distance Vector is a directed quantity, one with both magnitude and direction. For instance acceleration, velocity, force Basic Vector System Magnitude of vectors: Let P = (x, y, z). Vector OP P is defined by OP p x i + y j + z k []x, y, z with magnitude (length) OP p x2 + y 2 + z2 Calculation of Vectors Vector Equation Two vectors are equal if and only if the corresponding components are equals Let a a1i + a2 j + a3 k and b b1i + b2 j + b3 k. -
November 2019
A selection of some recent arrivals November 2019 Rare and important books & manuscripts in science and medicine, by Christian Westergaard. Flæsketorvet 68 – 1711 København V – Denmark Cell: (+45)27628014 www.sophiararebooks.com AMPÈRE, André-Marie. THE FOUNDATION OF ELECTRO- DYNAMICS, INSCRIBED BY AMPÈRE AMPÈRE, Andre-Marie. Mémoires sur l’action mutuelle de deux courans électri- ques, sur celle qui existe entre un courant électrique et un aimant ou le globe terres- tre, et celle de deux aimans l’un sur l’autre. [Paris: Feugeray, 1821]. $22,500 8vo (219 x 133mm), pp. [3], 4-112 with five folding engraved plates (a few faint scattered spots). Original pink wrappers, uncut (lacking backstrip, one cord partly broken with a few leaves just holding, slightly darkened, chip to corner of upper cov- er); modern cloth box. An untouched copy in its original state. First edition, probable first issue, extremely rare and inscribed by Ampère, of this continually evolving collection of important memoirs on electrodynamics by Ampère and others. “Ampère had originally intended the collection to contain all the articles published on his theory of electrodynamics since 1820, but as he pre- pared copy new articles on the subject continued to appear, so that the fascicles, which apparently began publication in 1821, were in a constant state of revision, with at least five versions of the collection appearing between 1821 and 1823 un- der different titles” (Norman). The collection begins with ‘Mémoires sur l’action mutuelle de deux courans électriques’, Ampère’s “first great memoir on electrody- namics” (DSB), representing his first response to the demonstration on 21 April 1820 by the Danish physicist Hans Christian Oersted (1777-1851) that electric currents create magnetic fields; this had been reported by François Arago (1786- 1853) to an astonished Académie des Sciences on 4 September. -
Levi-Civita,Tullio Francesco Dell’Isola, Emilio Barchiesi, Luca Placidi
Levi-Civita,Tullio Francesco Dell’Isola, Emilio Barchiesi, Luca Placidi To cite this version: Francesco Dell’Isola, Emilio Barchiesi, Luca Placidi. Levi-Civita,Tullio. Encyclopedia of Continuum Mechanics, 2019, 11 p. hal-02099661 HAL Id: hal-02099661 https://hal.archives-ouvertes.fr/hal-02099661 Submitted on 15 Apr 2019 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. 2 Levi-Civita, Tullio dating back to the fourteenth century. Giacomo the publication of one of his best known results Levi-Civita had also been a counselor of the in the field of analytical mechanics. We refer to municipality of Padua from 1877, the mayor of the Memoir “On the transformations of dynamic Padua between 1904 and 1910, and a senator equations” which, due to the importance of the of the Kingdom of Italy since 1908. A bust of results and the originality of the proceedings, as him by the Paduan sculptor Augusto Sanavio well as to its possible further developments, has has been placed in the council chamber of the remained a classical paper. In 1897, being only municipality of Padua after his death. According 24, Levi-Civita became in Padua full professor to Ugo Amaldi, Tullio Levi-Civita drew from in rational mechanics, a discipline to which he his father firmness of character, tenacity, and his made important scientific original contributions. -
Vector Calculus MA3VC 2016-17
Vector calculus MA3VC 2016–17: Assignment 1 SOLUTIONS AND FEEDBACK (Exercise 1) Prove that if f is a (smooth) scalar field and G~ is an irrotational vector field, then (∇~ f × G~ )f is solenoidal. Hint: do not expand in coordinates and partial derivatives. Use instead the vector differential identities of §1.4 and the properties of the vector product from §1.1.2 (recall in particular Exercise 1.15). (Version 1) We compute the divergence of the vector field (∇~ f × G~ )f using the product rules (29) and (30) for the divergence: (29) ∇~ · (∇~ f × G~ )f = ∇~ f · (∇~ f × G~ )+ f∇~ · (∇~ f × G~ ) (30) = ∇~ f · (∇~ f × G~ )+ f(∇×~ ∇~ f) · G~ − f∇~ f · (∇×~ G~ ). The first term in this expression vanishes1 because of the identities u~ ·(~u×w~ )= w~ ·(~u×~u) (by Exercise 1.15) and ~u × u~ = ~0 (by the anticommutativity of the vector product (3)), which hold for all u~ , w~ ∈ R3. Applying these formulas with ~u = ∇~ f and w~ = G~ we get ∇~ f · (∇~ f × G~ )= G~ · (∇~ f × ∇~ f)= G~ · ~0 = 0. The second term vanishes because of the “curl-grad identity” (26): ∇×~ ∇~ f = ~0. The last term vanishes because G~ is irrotational: ∇×~ G~ = ~0. So we conclude that the field (∇~ f × G~ )f is solenoidal because its divergence vanishes: ∇~ · (∇~ f × G~ )f = G~ · (∇~ f × ∇~ f)+ f(∇×~ ∇~ f) · G~ − f∇~ f · (∇×~ G~ )=0. =~0 =~0 =~0 | {z } | {z } | {z } (Version 2) Alternatively, one could expand the field in coordinates. This solution is of course much more complicated and prone to errors than the previous one. We first write the product rule for products of three scalar fields, which is proved by applying twice the usual product rule for partial derivatives (8): ∂ ∂ (8) ∂(fg) ∂h (8) ∂f ∂g ∂h ∂f ∂g ∂h (fgh)= (fg)h = h + fg = g + f h + fg = gh + f h + fg .