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Mechanics of Materials



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This is the 9th edition with a publication date of 1/3/2013.

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Customer Reviews

"Concise, Excellent"  July 15, 2014

"Mechanics of Materials (9th Edition) is a straight to the point textbook that begins with the simple and builds to the more complex. It is important to note which version you are using however because the softcover of the book is rife with typos and is missing many of the diagrams and tables that make the hardcover version feel complete. Due its linear style of starting with the easier material and building to more challenging problems it is great for students such as me and my peers. I do notice many typos which make it hard to read at time and I would expect a text book to be better ‘spell checked'."

mechanics of materials 9th edition  July 7, 2014

Ideal introduction to material handling principles. I'd be hesitant to recommend renting this book, as it may come in handy for later on engineering cl[censored], so buy a used copy to save a few bucks and retain the book for future reference. Overall, ecampus shipped fairly quickly and the pricing was fair, will shop again.

Mechanics of Materials: 5 out of 5 stars based on 2 user reviews.


For undergraduate Mechanics of Materials courses in Mechanical, Civil, and Aerospace Engineering departments.


Containing Hibbeler’s hallmark student-oriented features, this text is in four-color with a photorealistic art program designed to help students visualize difficult concepts.  A clear, concise writing style and more examples than any other text further contribute to students’ ability to master the material.


This edition is available with MasteringEngineering, an innovative online program created to emulate the instructor’s office–hour environment, guiding students through engineering concepts from Mechanics of Materials with self-paced individualized coaching.


Note: If you are purchasing the standalone text or electronic version, MasteringEngineering does not come automatically packaged with the text. To purchase MasteringEngineering, please visit: or you can purchase a package of the physical text + MasteringEngineering by searching the Pearson Higher Education website.  Mastering is not a self-paced technology and should only be purchased when required by an instructor.

Author Biography

R.C. Hibbeler graduated from the University of Illinois at Urbana with a BS in Civil Engineering (major in Structures) and an MS in Nuclear Engineering. He obtained his PhD in Theoretical and Applied Mechanics from Northwestern University.


Hibbeler’s professional experience includes postdoctoral work in reactor safety and analysis at Argonne National Laboratory, and structural work at Chicago Bridge and Iron, as well as Sargent and Lundy in Tucson. He has practiced engineering in Ohio, New York, and Louisiana.


Hibbeler currently teaches at the University of Louisiana, Lafayette. In the past he has taught at the University of Illinois at Urbana, Youngstown State University, Illinois Institute of Technology, and Union College.

Table of Contents

1 Stress 3

Chapter Objectives 3

1.1 Introduction 3

1.2 Equilibrium of a Deformable Body 4

1.3 Stress 22

1.4 Average Normal Stress in an Axially Loaded Bar 24

1.5 Average Shear Stress 32

1.6 Allowable Stress Design 46

1.7 Limit State Design 48


2 Strain 67

Chapter Objectives 67

2.1 Deformation 67

2.2 Strain 68


3 Mechanical Properties of Materials 83

Chapter Objectives 83

3.1 The Tension and Compression Test 83

3.2 The Stress—Strain Diagram 85

3.3 Stress—Strain Behavior of Ductile and Brittle Materials 89

3.4 Hooke’s Law 92

3.5 Strain Energy 94

3.6 Poisson’s Ratio 104

3.7 The Shear Stress—Strain Diagram 106

*3.8 Failure of Materials Due to Creep and Fatigue 109


4 Axial Load 121

Chapter Objectives 121

4.1 Saint-Venant’s Principle 121

4.2 Elastic Deformation of an Axially Loaded Member 124

4.3 Principle of Superposition 138

4.4 Statically Indeterminate Axially Loaded Member 139

4.5 The Force Method of Analysis for Axially Loaded Members 145

4.6 Thermal Stress 153

4.7 Stress Concentrations 160

*4.8 Inelastic Axial Deformation 164

*4.9 Residual Stress 166


5 Torsion 181

Chapter Objectives 181

5.1 Torsional Deformation of a Circular Shaft 181

5.2 The Torsion Formula 184

5.3 Power Transmission 192

5.4 Angle of Twist 204

5.5 Statically Indeterminate Torque-Loaded Members 218

*5.6 Solid Noncircular Shafts 225

*5.7 Thin-Walled Tubes Having Closed Cross Sections 228

5.8 Stress Concentration 238

*5.9 Inelastic Torsion 241

*5.10 Residual Stress 243


6 Bending 259

Chapter Objectives 259

6.1 Shear and Moment Diagrams 259

6.2 Graphical Method for Constructing Shear and Moment Diagrams 266

6.3 Bending Deformation of a Straight Member 285

6.4 The Flexure Formula 289

6.5 Unsymmetric Bending 306

*6.6 Composite Beams 316

*6.7 Reinforced Concrete Beams 319

*6.8 Curved Beams 323

6.9 Stress Concentrations 330

*6.10 Inelastic Bending 339


7 Transverse Shear 363

Chapter Objectives 363

7.1 Shear in Straight Members 363

7.2 The Shear Formula 365

7.3 Shear Flow in Built-Up Members 382

7.4 Shear Flow in Thin-Walled Members 391

*7.5 Shear Center for Open Thin-Walled Members 396


8 Combined Loadings 409

Chapter Objectives 409

8.1 Thin-Walled Pressure Vessels 409

8.2 State of Stress Caused by Combined Loadings 416


9 Stress Transformation 441

Chapter Objectives 441

9.1 Plane-Stress Transformation 441

9.2 General Equations of Plane-Stress Transformation 446

9.3 Principal Stresses and Maximum In-Plane Shear Stress 449

9.4 Mohr’s Circle–Plane Stress 465

9.5 Absolute Maximum Shear Stress 477


10 Strain Transformation 489

Chapter Objectives 489

10.1 Plane Strain 489

10.2 General Equations of Plane-Strain Transformation 490

*10.3 Mohr’s Circle–Plane Strain 498

*10.4 Absolute Maximum Shear Strain 506

10.5 Strain Rosettes 508

10.6 Material-Property Relationships 512

*10.7 Theories of Failure 524


11 Design of Beams and Shafts 541

Chapter Objectives 541

11.1 Basis for Beam Design 541

11.2 Prismatic Beam Design 544

*11.3 Fully Stressed Beams 558

*11.4 Shaft Design 562


12 Deflection of Beams and Shafts 573

Chapter Objectives 573

12.1 The Elastic Curve 573

12.2 Slope and Displacement by Integration 577

*12.3 Discontinuity Functions 597

*12.4 Slope and Displacement by the Moment-Area Method 608

12.5 Method of Superposition 623

12.6 Statically Indeterminate Beams and Shafts 631

12.7 Statically Indeterminate Beams and Shafts–Method of Integration 632

*12.8 Statically Indeterminate Beams and Shafts–Moment-Area Method 637

12.9 Statically Indeterminate Beams and Shafts–Method of Superposition 643


13 Buckling of Columns 661

Chapter Objectives 661

13.1 Critical Load 661

13.2 Ideal Column with Pin Supports 664

13.3 Columns Having Various Types of Supports 670

*13.4 The Secant Formula 682

*13.5 Inelastic Buckling 688

*13.6 Design of Columns for Concentric Loading 696

*13.7 Design of Columns for Eccentric Loading 707


14 Energy Methods 719

Chapter Objectives 719

14.1 External Work and Strain Energy 719

14.2 Elastic Strain Energy for Various Types of Loading 724

14.3 Conservation of Energy 737

14.4 Impact Loading 744

*14.5 Principle of Virtual Work 755

*14.6 Method of Virtual Forces Applied to Trusses 759

*14.7 Method of Virtual Forces Applied to Beams 766

*14.8 Castigliano’s Theorem 775

*14.9 Castigliano’s Theorem Applied to Trusses 777

*14.10 Castigliano’s Theorem Applied to Beams 780



A. Geometric Properties of an Area

B. Geometric Properties of Structural Shapes

C. Slopes and Deflections of Beams

Fundamental Problems Partial Solutions and Answers

Answers for Selected Problems



(*) Sections of the book that contain more advanced material are indicated by a star. Time permitting, some of these topics may be included in the course. Furthermore, this material provides a suitable reference for basic principles when it is covered in other courses, and it can be used as a basis for assigning special projects.

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