Roark's Formulas for Stress and Strain

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Roark's Formulas for Stress and Strain
Roark's Formulas for Stress and Strain.jpg
4th edition (1965)
AuthorRichard G. Budynas and Ali M. Sadegh
PublisherMcGraw-Hill Companies, The
Publication date
Media typeHardback

Roark's Formulas for Stress and Strain was first published in 1938 and the most current ninth edition was published in March 2020.[1]


The subjects covered in the book include: bearing and shear stress, experimental stress analysis, and stress concentrations, as well as material behavior coverage and stress and strain measurement. Also included are expanded tables and cases; improved notations and figures within the tables; consistent table and equation numbering and verification of correction factors. The book organizes the formulas into tables in a hierarchical format – chapter, table, case, subcase—providing diagrams for each case and subcase.

This newly designed and thoroughly revised guide contains accurate and thorough tabulated formulations that can be applied to the stress analysis of a comprehensive range of structural components. Roark's Formulas for Stress and Strain, Ninth Edition has been reorganized into a user-friendly format that makes it easy to access and apply the information. The book explains all of the formulas and analyses needed by designers and engineers for mechanical system design. You will get a solid grounding in the theory behind each formula along with real-world applications that cover a wide range of materials.

Coverage includes:

• The behavior of bodies under stress

• Analytical, numerical, and experimental methods

• Tension, compression, shear, and combined stress

• Beams and curved beams

• Torsion, flat plates, and columns

• Shells of revolution, pressure vessels, and pipes

• Bodies under direct pressure and shear stress

• Elastic stability

• Dynamic and temperature stresses

• Stress concentration

• Fatigue and fracture

• Stresses in fasteners and joints

• Composite materials and solid biomechanics


Here are the topics covered in the 7th Edition:

Chapter 1 – Introduction
Chapter 2 – Stress and Strain: Important Relationships
Chapter 3 – The Behavior of Bodies Under Stress
Chapter 4 – Principles and Analytical Methods
Chapter 5 – Numerical Methods
Chapter 6 – Experimental Methods
Chapter 7 – Tension, Compression, Shear, and Combined Stress
Chapter 8 – Beams; Flexure of Straight Bars
Chapter 9 – Bending of Curved Beams
Chapter 10 – Torsion
Chapter 11 – Flat Plates
Chapter 12 – Columns and Other Compression Members
Chapter 13 – Shells of Revolution; Pressure Vessels; Pipes
Chapter 14 – Bodies in Contact Undergoing Direct Bearing and Shear Stress
Chapter 15 – Elastic Stability
Chapter 16 – Dynamic and Temperature Stresses
Chapter 17 – Stress Concentration Factors
Appendix A – Properties of a Plane Area
Appendix B – Glossary
Appendix C – Composite Materials

In all, there are over 5000 formulas for over 1500 different load/support conditions for various structural members.



Richard G. Budynas is professor of mechanical engineering at Rochester Institute of Technology. He is author of a newly revised McGraw-Hill textbook, Applied Strength and Applied Stress Analysis, 2nd Edition.

Ali M. Sadegh is a professor and the Founder and Director of the Center for Advanced Engineering Design at The City College of New York. He is a Licensed Professional Engineer, P.E., and a Certified Manufacturing Engineer, CMfgE.

Warren C. Young is professor emeritus in the department of mechanical engineering at the University of Wisconsin, Madison, where he was on the faculty for over 40 years. Dr. Young has also taught as a visiting professor at Bengal Engineering College in Calcutta, India, and served as chief of the Energy Manpower and Training Project sponsored by USAir in Bandung, Indonesia.