AME101-F07-LectureNotes

AME101-F07-LectureNotes - BASICS OF MECHANICAL ENGINEERING...

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Unformatted text preview: BASICS OF MECHANICAL ENGINEERING: INTEGRATING SCIENCE, TECHNOLOGY AND COMMON SENSE Paul D. Ronney Department of Aerospace and Mechanical Engineering University of Southern California Available on-line at http://ronney.usc.edu/AME101F07/ Copyright © 2006, 2007 by Paul D. Ronney. All rights reserved. ii Table of contents TABLE OF CONTENTS II FOREWORD IV CHAPTER 1. WHAT IS MECHANICAL ENGINEERING? 1 CHAPTER 2. UNITS 4 CHAPTER 3. “ENGINEERING SCRUTINY” 8 Scrutinizing analytical formulas and results 8 Scrutinizing computer solutions 9 Examples of use of units 10 Example 1. Drag force and power requirements for an automobile 10 Example 2. Scrutiny of a new formula 11 Example 3. Thermoelectric generator 12 Example 4. Density of matter 14 CHAPTER 4. STATISTICS 16 Mean and standard deviation 16 Stability of statistics 17 Least-squares fit to a set of data 18 CHAPTER 5. FORCES IN STRUCTURES 21 Forces and resultants 21 Moments of forces 22 Free body diagrams 25 Stresses, strains and material properties 29 Pressure vessels 35 Bending of beams 36 Buckling of columns 39 CHAPTER 6. FLUID MECHANICS 41 Fluid statics 41 Equations of fluid motion 42 Bernoulli’s equation 42 Conservation of mass 43 Navier-Stokes equations 44 Viscous effects 45 Definition of viscosity 45 No-slip boundary condition 46 Reynolds number 46 Laminar and turbulent flow 47 Lift, drag and fluid resistance 47 iii Lift and drag coefficients 47 Flow around spheres and cylinders 48 Flow through pipes 49 Compressible flow 52 CHAPTER 7. THERMAL AND ENERGY SYSTEMS 56 Conservation of energy – First Law of Thermodynamics 56 Statement of the First Law 56 Types of energy and energy transfers 56 Conservation of energy for a control mass or control volume 58 Processes 60 Examples of energy analysis using the 1 st Law 60 Second Law of thermodynamics 64 Engines cycles and efficiency 65 Heat transfer 67 Conduction 67 Convection 69 Radiation 69 CHAPTER 8. WRITTEN AND ORAL COMMUNICATION 71 APPENDIX A. SUGGESTED COURSE SYLLABUS 77 APPENDIX B. DESIGN PROJECTS 84 Generic suggestions about the design projects 84 How to run a meeting (PDR’s philosophy…) 84 Suggestions for the written report 84 Spaghetti Bridge 85 Hydro power 87 King of the Hill 93 APPENDIX C. PROBLEM-SOLVING METHODOLOGY 95 APPENDIX D. EXCEL TUTORIAL 96 INDEX 99 iv Foreword If you’re reading this book, you’re probably already enrolled in an introductory university course in Mechanical Engineering. The primary goals of this textbook are, to provide you, the student, with: 1. An understanding of what Mechanical Engineering is and to a lesser extent what is not 2. Some useful tools that will stay with you throughout your engineering education and career 3. A brief but significant introduction to the major topics of Mechanical Engineering and enough understanding of these topics so that you can relate them to each other 4. A sense of common sense The challenge is to accomplish these objectives without diluting the effort so much that you can’t...
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This note was uploaded on 07/22/2008 for the course AME 101L taught by Professor Ronney during the Fall '07 term at USC.

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AME101-F07-LectureNotes - BASICS OF MECHANICAL ENGINEERING...

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