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 |  موضوع: كتاب Practical Mechanics and Strength of Materials الخميس 16 يوليو 2020, 11:37 pm | |
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Practical Mechanics and Strength of Materials
By
Charles Wilbur Leigh, B.s.
Professor Emeritus of Analytic Mechanics at Illinois Institute
Of Technology; Coauthor,“ Plane and
Spherical Trigonometry"
And
John Frederic Mangold, B.e., C.e.
Associate Professor of Mechanics at Illinois Institute
Of Technology; Licensed Structural Engineer
Third Edition
Tenth Impression
و المحتوى كما يلي :
Contents
Preface to the Third Edition
Preface to the Second Edition
Chapter I. The Three Simple Stresses
Introduction - Force, Action, Mass - Unit Measure of Force
- Properties of a Force - Vectors and Scalars - External
and Internal Forces - Concentrated and Distributed Forces
- Resultant of Two Forces in the Same Straight Line -
Equilibrium - Action and Reaction - Tension and Compression Stress - Stress - Tensile and Root Area of Bolts - Shear
- Shear in a Bolt - Safe Working Stress - Ultimate Strength
of Materials
- Selection of Safe Working Stress - Stresses in
Thin Pipes or Cylinders - Longitudinal Tension - Stresses
in Hollow Spheres - Pressure of Water in a Tank.
CHAPTER II. WELDED AND RIVETED JOINTS
Structural Connections
- Riveted Joints - Stresses in a
Riveted Joint
- Single Shear - Double Shear - Bearing Stress
- Failure of Riveted Joints - Notation - Strength of Riveted
Joints
- Pitch and Back Pitch - Ultimate and Working
Stresses
- Efficiencies - Net and Gross Areas - Riveted Joints
of Maximum Efficiency - Derivations - Practical Considerations
- Stress Relations - Working Stresses for Structural
Joints
- Welding.
CHAPTER III. MECHANICAL PROPERTIES OF MATERIALS 66
Basis of Design - Alloys - Elastic Properties of Steel -
Elongation Modulus of Elasticity - Elastic Limit - Selection
of Working Stress - Hooke’s Law - Poisson’s Ratio - Biaxial
Stresses
- Temperature Stresses - Members Composed of
Two Materials - Actual Stress.
CHAPTER IV. RESULTANT AND EQUILIBRANT OF FORCES 84
Definitions
- Types of Force Systems - Resultant - Equilibrium
- Principle of Concurrence - Methods of Solving -
Resultant of Two Forces Algebraically - Free Body -
Analysis of a Simple Structure - Components of a Force
- Rectangular Components ix of ,a Force - Inclined Plane
PAGE
Resultant of More than Two Forces in a Plane
- Equilibrium
of More than Two Forces - Resultant of Concurrent Forces
by Summation - Equilibrium of Concurrent Forces -
Moments - Sign of Moments - The Moments of Concurrent
Forces
- Moments and Equilibrium - Design of Members
in Simple Structures - Resume of Methods.
CHAPTER V. - PARALLEL FORCES AND MOMENTS
Definitions and Illustrations - Resultant of Parallel Forces -
Resultant of More than Two Parallel Forces
- Couple -
Practical Applications.
124
CHAPTER VI. - STATIC AND KINETIC FRICTION
Maximum Friction
- Friction on an Inclined Plane - Force
Necessary to Move a Body on a Rough Plane - Least Force
- Cone of Friction - Wedge Action - Journal Friction -
Rolling Resistance - Jaekscrew.
. 139
CHAPTER VII.
- CONCURRENT, NONCOPLANAR FORCES
Resultant - Equilibrium - Condition for Equilibrium.
160
CHAPTER VIII. - NONCURRENT COPLANAR FORCES
Discussion
- General Method - Graphical Method - Multipleforce Body - Hinge and Pin Reactions - Algebraic Solution -
Illustrations.
175
CHAPTER IX. - FRAMED STRUCTURES, ROOF AND BRIDGE TRUSSES 197
Framed Structure
- General Types - Definitions - Best Support for Loads - Snow and Dead Loads - Wind Loads -
Stresses in Members of a Roof Truss
- Stresses Due to Wind
Loads - King Post Trusses - Truss with Ceiling Loads - The
Equilibrium Polygon - Reactions - Fixed Ends - Wind-load
Stresses by Graphical Method - Fink Roof Truss.
CHAPTER X.
- STABILITY AND CENTER OF GRAVITY
Discussion
- Center of Gravity by Experiment and Balancing - Center of Gravity of an Area - Practical Applications -
Center of Gravity of Weights and Volumes - Areas and
Solids by Revolution - Stability of a Body - Stability against
Rotation
- Dams.
240
CHAPTER XI. MOMENT OF INERTIA
Theory - Illustrations - Radius of Gyration - Transfer Formula - Principal Axes - Built Sections.
261CONTENTS XI
PAGB
CHAPTER XII. - BEAMS AND BEAM DESIGN
Elements of Theory - Shear and Shear Diagrams - Bending
Moment Diagram - Maximum Bending Moments for Various Types of Beams - Bending Moment from the Area under
the Shear Diagram - Maximum Bending Moment Due to a
Load Increasing Uniformly to the Center of the Beam -
Moving Loads - Resisting Moment for a Rectangular Section
- Live Load and Moisture Effect - Nominal and Real Sizes
of Timber
- Section Modulus - Strength of a Beam -
Illustrations - Bending in Oblique Planes - Simple Beams
with Load Increasing Uniformly from One End.
272
CHAPTER XIII. HORIZONTAL AND VERTICAL SHEAR
Horizontal Shear - Unit Horizontal and Vertical Shear at
Any Point in a Beam Are Equal - Formulas for Horizontal
Shear - Tension - or Compression Due to Shea
and Minimum Stresses-
- Shearing Stress in 1 Beams -
Shear in I Beams - Plate Girders.
. 316
Maximum
CHAPTER XIV. DEFLECTION, TYPICAL CASES
Discussion - Radius of Curvature in Terms of Bending
Moment - Formulas for Deflection - Cantilever with a
Concentrated London the Free End
- Cantilever with a Load
Not at the End
- Cantilever with a Uniformly Distributed
Load - Simple Beam with a Concentrated Load at the Center
- Simple Beam with a Uniformly Distributed Load - Simple
Beam with a Load Not at the Center - Combined Loads -
Simple Beam with Equal Concentrated Loads at the Third
Points
- Simple Beam with Equal Concentrated Loads at the
Quarter Points - Deflection Due to Oblique Loading.
337
CHAPTER XV. COMBINED STRESSES, SHORT COLUMNS 355
Direct and Bending Stresses - Derivation - Short Columns -
Eccentric Loads on Short Columns - Location of the True
Neutral Axis
- Circular Columns - Eccentric Riveted Connections
- The Middle Third in Dams - Shear Due to
Tension or Compression.
CHAPTER XVI. INDETERMINATE BEAMS, CONCRETE BEAMS 379
Discussion
- Beam Fixed at One End and Supported at the
Other - Beam with Fixed Ends, Carrying a Uniformly
Distributed Load
- Beam Resting on Three Supports
Equally Spaced - General Moment Equation - Continuous
Beams
- Three-moment Theorem - Theorem of Three MoXll CONTENTS
PAG
ments for Concentrated Loads - Computation of Reactions -
•Reinforced Concrete - Ideal Steel Ratio - Moment of Inertia
Method - T Beams - Shear and Diagonal Tension.
CHAPTER XVII. - METAL, TIMBER, AND CONCRETE COLUMNS 409
Definitions
- Selecting a Column - Hound Columns -
Straight-line Formulas - Radius of Gyration - Cast-iron
Columns
- Alloy Columns - Il-section Columns - Plate and
Channel Columns - Rankine’s Formula - Derivation of Rankine’s Formula
- The Forest Products Laboratory Formula
- Reinforced Concrete Columns - Eccentric Loads on I Columns
- Compression Flange as a Column - Column
Action in the Web of an I Beam.
CHAPTER XVIII. - TORSION, SHAFTS AND COUPLINGS
Torsion - Shearing Stress in Terms of Torque - Angle of
Twist - Work - Tension Due to Shear - Combined Torsion
and Bending - Shaft Couplings.
448
APPENDIX TABLES 465
INDEX 491
ANSWERS 495
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