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Elements of mechanics of materials
SCIENTIFIC &TECHNICAL BOOKS
REVIEWSOF BOOKS.FK)OCEEDINGS.JOURNALS Vol 1 No 4
AUGUST 1982
ELEMENTS OF MECHANICS OF MATERIALS Gerner A. Olsen, Prentice-Hall, Fourth Edition 1982 pp 636. This is an excellent text, providing as it does a comprehensive, yet simple and straightforward introduction to the mechanics of materials at a level suitable for first and/or second year undergraduates of materials science and technology (depending on their course of study). Although it is assumed that students reading this book already have a grasp of statics, a review chapter with an emphasis on free bodies is included. The book does lay considerable emphasis on fundamentals and generally assumes a direct proportionality between stress and strain. In order to help students become familiar with the basic principles, many worked examples are provided throughout the text and in addition, there are numerous other problems for the student to solve, whose answers are given. Students may t'md the book useful for quick reference to specific
SCI IZ-NTIFIC& TECIINICAL IX)OKS Dr. W.E. Duckworth Editor: Associate Editors: Dr. N.A. Waterman Dr. J.H. Elliott Dr. S.M. Lee R.F. Flint Publishers, Editorial & Advertisement Offices: Scientific & Technical Press Ltd, Chilberton House, Doods Road, Reigate, Surrey, England. Telephone: 07372 43521 Telex: 8811725 Subscriptions Scientific & Technical Books is published six times a year as a supplement to Materials & Design. Annual Subscription for both publications : £54 overseas, £48 U.K.
MATERIALS & DESIGN, Vol. 3, AUGUST 1982
topics and principles since the worked examples will help to overcome any problems they may have. Subjects covered include:- Axial and central loads - normal stress shear stress, stresses on diagonal planes, normal strains - shear strains, stress - strain relationships, temperature stresses, statically indeterminate loads. Design data obtained by experimentation stress]strain curves, structural properties, working stress allowing for safety. Stress in thinwalled cylinders and spheres, fabricated joint design. Torsion. Shearand bending-moment diagrams. Design of beams. Deflections of statically determinate beams. Statically indeterminate beams, moment-area principles, multiple supports, moment distribution plastic analysis and design. Eccentrically-applied loads. Columns. Combined stresses and strains, matrix and tensor analysis. Fatigue strength - stress concentrations. Energy relationships. Curved beams and Composite beams. Conveniently placed at the very beginning of the book is a list of symbols used in the text. The appendices are also very useful, the first dealing with centroids and second moments and the second containing tables relating to various parameters of importance when designing with different materials. The main difference between this (fourth) edition and the previous one is the partial introduction of S1 units. However, the book suffers from a very serious drawback in this repect in that it has been written for the American market and therefore, since the United States is only very gradually moving over to SI units, it is in the main in terms of the older inch-pound units. Hence, it may be difficult for some British students to relate the actual amounts of some properties of materials to real situations if they are only familiar with SI units (as most are these days). It also means that some aspects are not as conceptually clear or as precise as they could be. Nevertheless, having said this, the basic principles are, of course, still there. However, the book would be so
much more suitable for the European market if it were rewritten totally in SI units. G. Socrates CAPlLLIARY JOINING - BRAZING AND SOFT SOLDERING By" C.J. Thwaites Research Studies Press/John Wiley 1982 Price £10.50 This book is about the most common and certainly oldest metallurgical joining process and like other oldest professions this technique is frequently abused and much misunderstood. The author states his aim of informing potential users of these processes in engineering and does so from the start by clearing confusion with a comprehensive section on terminology. Basic requirements for capillary joining are covered well early in the publication to be followed by explanations and examples of joint shapes and types. This section has much potential value to engineers and is well covered without being didactic. Initially, the section on Idler metals may be too metallurgical for the proposed reader although later on the tabulation of solder and braze metals are very useful and comprehensive. Similarly, the approach to flux utilisation through a myriad of compositions is probably daunting to one not well versed in chemistry. The mechanics of flux application and removal, plus the control of brazing atmospheres restore the balance for potential users. The oft'quoted and frequently forgotten value of surface preparation are re-emphasised in a simple but powerful way. Comprehensive coverage of available joining techniques along with examples of their employment are given. This is good as this particular section is likely to be the most widely read by people who, after reading this, should be able to select processes sensibly. When dealing with quality control the author readily admits that, in fact, Q.C. is not a profitable route and that Quality Assurance approaches are more useful.
541
REVIEWSOF BOOKS.FK)OCEEDINGS.JOURNALS Vol 1 No 4
AUGUST 1982
ELEMENTS OF MECHANICS OF MATERIALS Gerner A. Olsen, Prentice-Hall, Fourth Edition 1982 pp 636. This is an excellent text, providing as it does a comprehensive, yet simple and straightforward introduction to the mechanics of materials at a level suitable for first and/or second year undergraduates of materials science and technology (depending on their course of study). Although it is assumed that students reading this book already have a grasp of statics, a review chapter with an emphasis on free bodies is included. The book does lay considerable emphasis on fundamentals and generally assumes a direct proportionality between stress and strain. In order to help students become familiar with the basic principles, many worked examples are provided throughout the text and in addition, there are numerous other problems for the student to solve, whose answers are given. Students may t'md the book useful for quick reference to specific
SCI IZ-NTIFIC& TECIINICAL IX)OKS Dr. W.E. Duckworth Editor: Associate Editors: Dr. N.A. Waterman Dr. J.H. Elliott Dr. S.M. Lee R.F. Flint Publishers, Editorial & Advertisement Offices: Scientific & Technical Press Ltd, Chilberton House, Doods Road, Reigate, Surrey, England. Telephone: 07372 43521 Telex: 8811725 Subscriptions Scientific & Technical Books is published six times a year as a supplement to Materials & Design. Annual Subscription for both publications : £54 overseas, £48 U.K.
MATERIALS & DESIGN, Vol. 3, AUGUST 1982
topics and principles since the worked examples will help to overcome any problems they may have. Subjects covered include:- Axial and central loads - normal stress shear stress, stresses on diagonal planes, normal strains - shear strains, stress - strain relationships, temperature stresses, statically indeterminate loads. Design data obtained by experimentation stress]strain curves, structural properties, working stress allowing for safety. Stress in thinwalled cylinders and spheres, fabricated joint design. Torsion. Shearand bending-moment diagrams. Design of beams. Deflections of statically determinate beams. Statically indeterminate beams, moment-area principles, multiple supports, moment distribution plastic analysis and design. Eccentrically-applied loads. Columns. Combined stresses and strains, matrix and tensor analysis. Fatigue strength - stress concentrations. Energy relationships. Curved beams and Composite beams. Conveniently placed at the very beginning of the book is a list of symbols used in the text. The appendices are also very useful, the first dealing with centroids and second moments and the second containing tables relating to various parameters of importance when designing with different materials. The main difference between this (fourth) edition and the previous one is the partial introduction of S1 units. However, the book suffers from a very serious drawback in this repect in that it has been written for the American market and therefore, since the United States is only very gradually moving over to SI units, it is in the main in terms of the older inch-pound units. Hence, it may be difficult for some British students to relate the actual amounts of some properties of materials to real situations if they are only familiar with SI units (as most are these days). It also means that some aspects are not as conceptually clear or as precise as they could be. Nevertheless, having said this, the basic principles are, of course, still there. However, the book would be so
much more suitable for the European market if it were rewritten totally in SI units. G. Socrates CAPlLLIARY JOINING - BRAZING AND SOFT SOLDERING By" C.J. Thwaites Research Studies Press/John Wiley 1982 Price £10.50 This book is about the most common and certainly oldest metallurgical joining process and like other oldest professions this technique is frequently abused and much misunderstood. The author states his aim of informing potential users of these processes in engineering and does so from the start by clearing confusion with a comprehensive section on terminology. Basic requirements for capillary joining are covered well early in the publication to be followed by explanations and examples of joint shapes and types. This section has much potential value to engineers and is well covered without being didactic. Initially, the section on Idler metals may be too metallurgical for the proposed reader although later on the tabulation of solder and braze metals are very useful and comprehensive. Similarly, the approach to flux utilisation through a myriad of compositions is probably daunting to one not well versed in chemistry. The mechanics of flux application and removal, plus the control of brazing atmospheres restore the balance for potential users. The oft'quoted and frequently forgotten value of surface preparation are re-emphasised in a simple but powerful way. Comprehensive coverage of available joining techniques along with examples of their employment are given. This is good as this particular section is likely to be the most widely read by people who, after reading this, should be able to select processes sensibly. When dealing with quality control the author readily admits that, in fact, Q.C. is not a profitable route and that Quality Assurance approaches are more useful.
541