COLLEGE HOUSE ENTERPRISES, LLC

 Design Analysis of Structural Elements

 Fourth Edition

 

 

 

 

 

 

This textbook has been prepared to support an integrated course offering for Statics and Mechanics of Materials.  Hopefully the integration of the topics of these two closely related courses will make the learning experience for the students easier and more meaningful.  Statics provides the first exposure of engineering students to the study of mechanics.  While Statics is a relatively simple subject, many students find it difficult, and they often perform far below our expectations.  In an effort to improve the curriculum, several members of the faculty at the University of Maryland have been working to enhance the student’s learning experience when studying the first two courses in mechanics.  This textbook indicates some of the changes in the philosophy adopted by the faculty when presenting the subject matter traditionally offered in introductory mechanics courses.

The changes in the philosophy were based on five premises:

             1.       Present the fundamental concepts in a more interesting manner.

·         Change the approach to make it more realistic and less abstract.

·         Couple the mechanics content tightly to design.

 

2.       Provide a smooth transition from Introduction to Engineering Design to Design Analysis of Structural Components that encompasses both Statics and Mechanics of Materials.

·         Incorporate a hands-on experience including design, construction and testing of a model of a construction project.

·         Provide the analysis methods and the scaling relations for verifying the safety of the design of this model.

 

3.       Emphasize modeling structural components by stressing throughout the text the importance of preparing a complete free body diagram (FBD).

·         Show the method for constructing complete FBDs.

·         Integrate the FBD with the application of the equilibrium equations.

·         Approach the solution of equilibrium problems with equilibrium relations based on force and moment components.

·         Introduce vectors in conjunction with forces and moments, but only employ vector analysis after both FBDs and equilibrium concepts have been firmly established.

4.       Integrate the content of Statics with that of Mechanics of Materials.

·         The concepts of normal and shearing stresses are introduced early in Statics.

·         Topics associated with Statics and with Mechanics of Materials are merged in Chapters 4 through 9.

·         Chapters 10 though 15 describe topics typically found in Mechanics of Materials but with a heavy emphasis on design.

·         Fracture mechanics, a topic new to Mechanics of Materials courses, is introduced in Chapter 16.

 

CONTENTS:

        CHAPTER   1  BASIC CONCEPTS IN MECHANICS

         CHAPTER   2  FORCES AND MOMENTS

         CHAPTER   3  FREE BODY DIAGRAMS AND EQUILIBRIUM  

         CHAPTER   4  AXIALLY LOADED STRUCTURAL MEMBERS

         CHAPTER   5  MATERIAL PROPERTIES 

         CHAPTER   6  TRUSSES

         CHAPTER   7 SPACE STRUCTURES  

         CHAPTER   8 FRAMES AND MACHINES

         CHAPTER   9  FRICTION  

         CHAPTER 10  STRESSES IN BEAMS

         CHAPTER 11  STRESSES DUE TO TORSION

         CHAPTER 12  STRESSES DUE TO COMBINED LOADING

         CHAPTER 13  DEFLECTION IN BEAMS

         CHAPTER 14  BUCKLING

         CHAPTER 15  ENERGY METHODS  

       CHAPTER 16  FRACTURE MECHANICS

APPENDICES

            APPENDIX A  Wire and Sheet Metal Gages                                     

             APPENDIX B1  Physical Properties of Common Structural Materials                           

             APPENDIX B2  Tensile Properties of Common Structural Materials 

             APPENDIX B3  Tensile Properties of Non Metallic Materials 

             APPENDIX C  Properties of Areas

             APPENDIX D  Geometric Properties of Rolled Steel Shapes

             APPENDIX E  Equations for the Deflection of Beams

             APPENDIX F  Design Projects

        INDEX                                                           

 ABOUT THE AUTHORS

James W. Dally obtained a Bachelor of Science and a Master of Science degree, both in Mechanical Engineering from the Carnegie Institute of Technology.  He obtained a Doctoral degree in mechanics from the Illinois Institute of Technology.  He has taught at Cornell University, Illinois Institute of Technology, the U. S. Air Force Academy and served as Dean of Engineering at the University of Rhode Island.  He is currently a Glenn L. Martin Professor of Engineering (Emeritus) at the University of Maryland, College Park.

Jim has also held positions at the Mesta Machine Co., IIT Research Institute and IBM.  He is a fellow of the American Society for Mechanical Engineers, Society for Experimental Mechanics, and the American Academy of Mechanics.  He was appointed as an honorary member of the Society for Experimental Mechanics in 1983 and elected to the National Academy of Engineering in 1984.  Jim was selected by his peers to receive the Senior Faculty Outstanding Teaching Award in the College of Engineering and the Distinguish Scholar Teacher Award from the University.  He was also a member of the University of Maryland team receiving the 1996 Outstanding Educator Award sponsored by the Boeing Co.  

Jim has co-authored several other books: Experimental Stress Analysis, Photoelastic Coatings, Instrumentation for Engineering Measurements, Packaging of Electronic Systems, Production Engineering and Manufacturing, and Introduction to Engineering Design, Books 1, 2, 3, 4, 5, 6 and 7.  He has written about 200 scientific papers and holds five patents.

Robert J. Bonenberger, Jr. obtained B.S.E., M.S. and Ph.D. degrees in Mechanical Engineering from the University of Maryland, Baltimore County and College Park campuses.  He has taught undergraduate and graduate students in mechanics, strength of materials, and experimental stress analysis.  Currently, he is an Assistant Research Scientist and Lecturer in the Clark School of Engineering at the University of Maryland, College Park.

Previously, Bob worked in the Fracture Mechanics Section at the Naval Research Laboratory, both as a postdoctoral fellow and as a contract employee.  He is a member of the American Society for Mechanical Engineers, Society for Experimental Mechanics, American Society for Materials, and American Society for Engineering Education.  His research interests include material behavior at high strain rates, experimental stress analysis, and fracture mechanics.  He has authored or co-authored 18 scientific papers.

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