Fracture Mechanics

428 Pages·2017·8.924 MB·English

by  Nestor Perez (auth.)

Nestor Perez
Fracture
Mechanics
Second Edition
Fracture Mechanics

Nestor Perez
Fracture Mechanics
Second Edition
123
NestorPerez
DepartmentofMechanicalEngineering
UniversityofPuertoRico
Mayaguez,PuertoRico
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ISBN978-3-319-24997-1 ISBN978-3-319-24999-5 (eBook)
DOI10.1007/978-3-319-24999-5
LibraryofCongressControlNumber:2016939394
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Foreword
FirstEditionofFractureMechanicsbyDr.NestorPerez
Ihadthepleasureandtheprivilegeofreadingtheoriginalbook,particularlysome
of the important chapters of the book on fracture mechanics by Dr. Nestor Perez.
I find the book, in general, very well written for the academicians as well as
for the practitioners in the field of engineering fracture mechanics. The language
is simple, clear, and straight to the point. Each chapter is developed in such a
way that the mathematical treatment supports the main physical mechanism of
fracture. The equations are arranged in an orderly fashion in harmony with the
descriptive concepts of a phenomenon that is highly complex, very nonlinear, and
often unpredictable. The main objective of a mathematical analysis is to explain
andclarifyaphysicalphenomenonanddefinitelynottojeopardizeitbyundueand
unwanted complexity at the cost of brevity. If this is true for a textbook or any
treatiseforthatmatter,Dr.Perez’sbookhasdonethejobquiteelegantly.
Thisbookissuitableasatextbookforseniorundergraduateandgraduatestudents
ofaone-semestercourseinmechanical,civil,chemical,andindustrialengineering,
materialsscience,aswellasappliedphysicsandappliedchemistryprograms.
Each chapter is self-contained and self-sufficient in descriptive details, but it
keeps asmoothcontinuity withitspreceding and followingchapters. Theanalytic
and the algebraic illustrations are just in place with theoretical analyses and
examples. Unlike many voluminous works on fracture mechanics, in this book,
mathematicsdoesnotoverburdenthephysicsoffracturemechanicsandthusshows
a more realistic route to solve a particular problem. Hence, practicing engineers
in consulting firms and design offices can use this book in a very handy and
straightforward fashion. Also it is a good reference book in the personal library
ofmanyretiredprofessionalsandprofessorswhostillliketokeepintouchwiththe
realityasahobby,pastime,orpleasure.
I highly recommend this book to any technical publishing house for the timely
birthofthissolidbutsimpleworkonengineeringfracturemechanics.
JournalofMechanicalBehavior JayK.Banerjee,Ph.D.,P.E.,M.Ed.
ofMaterials
Editor(2003)
vii
viii Foreword
SecondEditionofFractureMechanicsbyDr.NestorPerez
It is just over a decade since Dr. Nestor Perez published his book on fracture
mechanics. During these 10 years, many emerging fields have gained momentum
andexpandedtheirboundariesrelatedtothefailureofmaterialsthroughinstability
andfracture.Someofthemaretheruptureofcellmembranesandtissuesintissue
mechanics, the plastic flow and fracture of bones and tendons in the knees and
elbows,aswellasthealliedareasofbiomechanicsandsportsmedicine.Iamsure
that the fundamental concepts of flow and fracture in all “engineerable” materials
as developed and presented by Dr. Perez in the first edition of his book, Fracture
Mechanics, has served in many of the emerging areas of materials science and
technologyasmentionedabove.
Incontinuationwiththisspirit,Dr.Perezhasaddednewconceptsinthesecond
editionofhisbook.Ineachchapter,additionalapproachesareintroducedinsimple
but convincing manners through a variety of examples. Besides, new numerical
problemsareaddedasexamplesonhowtoapplytheadvancedtheoriesinpractice.
Such examples do help not only the students and their instructors in a classroom
environment but also the researchers and their mentors in a laboratory of fracture
mechanics.
In sum, in the second edition, Dr. Perez not only reinforces the basic concepts
of fracture mechanics by presenting new examples on their applications but also
adds and hence expands them into the novel and emerging branches of materials
science. This new edition will help enhance both teaching at the undergraduate-
and graduate-level courses as well as will facilitate the researchers to advance
their theoretical concepts and apply them in practice in the realm of the failure of
materials. These are the improvements in the second edition worth navigating and
exploringintotheunknownofthematter:thematerialsresearch.
ProfessorofManufacturingProcesses JayK.Banerjee,Ph.D.,P.E.,M.Ed.
andSystems
MechanicalEngineeringDepartment
UniversityofPuertoRicoatMayaguez
Mayaguez,PR,USA
2016
Preface
Thissecondeditionofthebookretainsallthefeaturesofthepreviouseditionwhile
new ones are added. The main work in this edition includes refining text in each
chapter,expansionofsomesectionsinseveralchapters,andadditionofexamples,
problems, and new sections,such as conformal mapping and mechanical behavior
ofwood.
The purpose of this book is to present, in a closed form, analytical methods in
derivingstressandstrainfunctionsrelatedtofracturemechanics.Thisbookcontains
a compilation of work available in the literature in a scatter form and, to a certain
extent, selected experimental data of many researchers to justify the theoretical
fracture mechanics models in solving crack problems. It is a self-contained and
detailedbookforthereader(seniorandgraduatestudentsandengineers)involvedin
theanalysisoffailureusingamathematicalapproachfordesigningagainstfracture.
However, it is important that the reader understands the concept of modeling,
problem solving, and interpreting the meaning of mathematical solution for a
particular engineering problem or situation. Once this is accomplished, the reader
should be able to think mathematically, foresee metallurgically the significance
of microstructural parameters on properties, analyze the mechanical behavior of
materials, and recognize realistically how dangerous a crack is in a stressed
structure,whichmayfailcatastrophically.
Inspiteoftheadvancesinfracturemechanics,manyprinciplesremainthesame.
Dynamic fracture mechanics is included through the field of fatigue and Charpy
impact testing. The material included in this book is based upon the development
ofanalyticalandnumericalprocedurespertinenttoparticularfieldsoflinearelastic
fracturemechanics(LEFM)andplasticfracturemechanics(PFM),includingmixed-
mode-loadinginteraction.Themathematicalapproachundertakenhereiniscoupled
withabriefreviewofseveralfracturetheoriesavailableincitedreferences.
Fracturemechanicsofengineeringmaterialsdealswithfractureofsolidsunder-
goinglargedeformation(ductilematerials)and/orfracture(brittlematerials)when
subjected to extreme loading. The analysis of a solid responding to loads is
concerned partly with microscopic mechanisms of fracture, establishing fracture
criteria,andpredictingthefracturestressfromamacroscopicapproach.
ix