6th Edition

Applied Strength of Materials

ISBN 9781498716758
Published September 27, 2016 by CRC Press
850 Pages 17 Color & 647 B/W Illustrations

USD $190.00

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Book Description

Designed for a first course in strength of materials, Applied Strength of Materials has long been the bestseller for Engineering Technology programs because of its comprehensive coverage, and its emphasis on sound fundamentals, applications, and problem-solving techniques. The combination of clear and consistent problem-solving techniques, numerous end-of-chapter problems, and the integration of both analysis and design approaches to strength of materials principles prepares students for subsequent courses and professional practice. The fully updated Sixth Edition. Built around an educational philosophy that stresses active learning, consistent reinforcement of key concepts, and a strong visual component, Applied Strength of Materials, Sixth Edition continues to offer the readers the most thorough and understandable approach to mechanics of materials.

Table of Contents


Basic Concepts in Strength of Materials

The Big Picture

Objective of This Book – To Ensure Safety

Objectives of This Chapter

Problem-solving Procedure

Basic Unit Systems

Relationship Among Mass, Force, and Weight

The Concept of Stress

Direct Normal Stress

Stress Elements for Direct Normal Stresses

The Concept of Strain

Direct Shear Stress

Stress Element for Shear Stresses

Preferred Sizes and Standard Shapes

Experimental and Computational Stress

Design Properties of Materials

The Big Picture

Objectives of This Chapter

Design Properties of Materials


Cast Iron


Copper, Brass, and Bronze

Zinc, Magnesium, Titanium, and Nickel-Based Alloys

Nonmetals in Engineering Design





Materials Selection

Direct Stress, Deformation, and Design

The Big Picture and Activity

Objectives of this Chapter

Design of Members under Direct Tension or Compression

Design Normal Stresses

Design Factor

Design Approaches and Guidelines for Design Factors

Methods of Computing Design Stress

Elastic Deformation in Tension and Compression Members

Deformation Due to Temperature Changes

Thermal Stress

Members Made of More Than One Material

Stress Concentration Factors for Direct Axial Stresses

Bearing Stress

Design Bearing Stress

Design for Direct Shear, Torsional Shear, and Torsional Deformation

The Big Picture

Objectives of This Chapter

Design for Direct Shear Stress

Torque, Power, and Rotational Speed

Torsional Shear Stress in Members with Circular Cross Sections

Development of the Torsional Shear Stress Formula

Polar Moment of Inertia for Solid Circular Bars

Torsional Shear Stress and Polar Moment of Inertia for Hollow Circular Bars

Design of Circular Members under Torsion

Comparison of Solid and Hollow Circular Members

Stress Concentrations in Torsionally Loaded Members

Twisting – Elastic Torsional Deformation

Torsion in Noncircular Sections

Shearing Forces and Bending Moments in Beams

The Big Picture

Objectives of this Chapter

Beam Loading, Supports, and Types of Beams

Reactions at Supports

Shearing Forces and Bending Moments for Concentrated Loads

Guidelines for Drawing Beam Diagrams for Concentrated Loads

Shearing Forces and Bending Moments for Distributed Loads

General Shapes Found in Bending Moment Diagrams

Shearing Forces and Bending Moments for Cantilever Beams

Beams with Linearly Varying Distributed Loads

Free-Body Diagrams of Parts of Structures

Mathematical Analysis of Beam Diagrams

Continuous Beams – Theorem of Three Moments


Centroids and Moments of Inertia of Areas

The Big Picture

Objectives of This Chapter

The Concept of Centroid – Simple Shapes

Centroid of Complex Shapes

The Concept of Moment of Inertia

Moment of Inertia for Composite Shapes Whose Parts have the Same Centroidal Axis

Moment of Inertia for Composite Shapes – General Case – Use of the Parallel Axis Theorem

Mathematical Definition of Moment of Inertia

Composite Sections Made from Commercially Available Shapes

Moment of Inertia for Shapes with all Rectangular Parts

Radius of Gyration

Section Modulus


Stress Due to Bending

The Big Picture

Objectives of This Chapter

The Flexure Formula

Conditions on the Use of the Flexure Formula

Stress Distribution on a Cross Section of a Beam

Derivation of the Flexure Formula

Applications – Beam Analysis

Applications – Beam Design and Design Stresses

Section Modulus and Design Procedures

Stress Concentrations

Flexural Center or Shear Center

Preferred Shapes for Beam Cross Sections

Design of Beams to be Made from Composite Materials

Shearing Stresses in Beams

The Big Picture

Objectives of this Chapter

Importance of Shearing Stresses in Beams

The General Shear Formula

Distribution of Shearing Stress in Beams

Development of the General Shear Formula

Special Shear Formulas

Design for Shear

Shear Flow

Deflection of Beams

The Big Picture

Objectives of this Chapter

The Need for Considering Beam Deflections

General Principles and Definitions of Terms

Beam Deflections Using the Formula Method

Comparison of the Manner of Support for Beams

Superposition Using Deflection Formulas

Successive Integration Method

Moment-Area Method

Combined Stresses

The Big Picture

Objectives of this Chapter

The Stress Element

Stress Distribution Created by Basic Stresses

Creating the Initial Stress Element

Combined Normal Stresses

Combined Normal and Shear Stresses

Equations for Stresses in Any Direction

Maximum Stresses

Mohr’s Circle for Stress

Stress Condition on Selected Planes

Special Case in which Both Principal Stresses have the Same Sign

Use of Strain-Gage Rosettes to Determine Principal Stress Columns


The Big Picture

Objectives of this Chapter

Slenderness Ratio

Transition Slenderness Ratio

The Euler Formula for Long Columns

The J. B. Johnson Formula for Short Columns

Summary – Buckling Formulas

Design Factors and Allowable Load

Summary – Method of Analyzing Columns

Column Analysis Spreadsheet

Efficient Shapes for Columns

Specifications of the AISC

Specifications of the Aluminum Association

Non-Centrally Loaded Columns

Pressure Vessels

The Big Picture

Objectives of this Chapter

Distinction Between Thin-Walled and Thick-Walled Pressure Vessels

Thin-Walled Spheres

Thin-Walled Cylinders

Thick-Walled Cylinders and Spheres

Analysis and Design Procedures for Pressure Vessels

Spreadsheet Aid for Analyzing Thick-Walled Spheres and Cylinders

Shearing Stress in Cylinders and Spheres

Other Design Considerations for Pressure Vessels

Composite Pressure Vessels


The Big Picture

Objectives of this Chapter

Modes of Failure for Bolted Joints

Design of Bolted Connections

Riveted Joints

Eccentrically Loaded Riveted and Bolted Joints

Welded Joints with Concentric Loads


Answers to Selected Problems

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Robert L. Mott is professor emeritus of engineering technology at the University of Dayton. He is a member of ASEE, SME, and ASME. He is a Fellow of ASEE and a recipient of the ASEE James H. McGraw Award, Frederick J. Berger Award, and the Archie Higdon Distinguished Educator Award (From Applied Mechanics Division). He is a recipient of the SME Education Award. He holds the Bachelor of Mechanical Engineering degree from General Motors Institute (now Kettering University) and the Master of Science in Mechanical Engineering from Purdue University. His industry experience includes General Motors Corporation, consulting for several companies, and serving as an expert witness on numerous legal cases. He is the author of three textbooks: Applied Fluid Mechanics 7th ed. (co-authored with Joseph A. Untener) and Machine Elements in Mechanical Design 6th ed., published by Pearson/Prentice-Hall; Applied Strength of Materials 6th ed. (co-authored with Joseph A. Untener) with CRC Press.

Joseph A. Untener, P.E. is a professor of engineering technology at the University of Dayton. He is a member of ASEE, SME, and ASME. He holds the Bachelor of Mechanical Engineering degree from General Motors Institute (now Kettering University) and the Master of Science in Industrial Administration from Purdue University. He has worked on the design and implementation of manufacturing equipment at General Motors, and served as an engineering consultant for many other companies. He teaches courses in Mechanical Engineering Technology at UD. He has co-authored two textbooks with Robert L. Mott: Applied Fluid Mechanics 7th ed. published by Pearson/Prentice-Hall, and Applied Strength of Materials 6th ed. with CRC Press.


"This is a well-written textbook, with a good balance of theoretical background, industry relevant examples and problems for the students to solve. Equally valuable are the appendices containing extensive listings of properties of materials and structural shapes."
— Aurelian Simionescu, Texas A&M University, USA

"All versions of Mott’s strengths text provide a very solid base for mechanical design and the corresponding analysis needed for its verification. This base continues in the 6th edition.

The simple conceptual activities are an outstanding feature of this edition. They truly connect students to strengths of materials and its daily application in a way that benefits most people, not just those who have machine shop or woodworking experience. Establishing this connection greatly improves the success of our engineering technology students, leveling the playing field for those who have little background with making and understanding real physical products and piquing the interest of all. The activities are straightforward, low-cost, and set up for completion by small teams – perfect for active learning classrooms and feasible as homework assignments for distance education students.

The experimental and modeling content of the 6th edition is sufficient to make students aware of these areas of the field without distracting from the core instruction in design and analysis. Lab-based courses benefit from linking to the design; students in lecture-only courses gain insight into how designs are validated. The extent of the homework problems and their inclusion of everyday items like swing sets really enhances the Mott and Untener text."
— Nancy L. Denton, Purdue University, USA

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