''Roark's Formulas for Stress and Strain'' is a mechanical engineering design book written by Richard G. Budynas and Ali M. Sadegh. It was first published in 1938 and the most current ninth edition was published in March 2020.

Subjects

The book covers various subjects, including bearing and

shear stress Shear stress (often denoted by , Greek alphabet, Greek: tau) is the component of stress (physics), stress coplanar with a material cross section. It arises from the shear force, the component of force vector parallel to the material cross secti ...

, experimental

stress analysis Stress may refer to: Science and medicine * Stress (biology) Stress, whether physiological, biological or psychological, is an organism's response to a stressor, such as an environmental condition or change in life circumstances. When s ...

stress concentrations In solid mechanics, a stress concentration (also called a stress raiser or a stress riser or notch sensitivity) is a location in an object where the stress is significantly greater than the surrounding region. Stress concentrations occur when th ...

, material behavior, and stress and strain measurement. It also features expanded tables and cases, improved notations and figures within the tables, consistent table and equation numbering, and verification of correction factors. The formulas are organized into tables in a hierarchical format: chapter, table, case, subcase, and each case and subcase is accompanied by diagrams. The main topics of the book include: • 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

Topics

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 5,000

formula In science, a formula is a concise way of expressing information symbolically, as in a mathematical formula or a ''chemical formula''. The informal use of the term ''formula'' in science refers to the general construct of a relationship betwe ...

s for over 1,500 different load/support conditions for various structural members.

Editions

* 1st Edition 1938 * 2nd Edition 1943 * 3rd Edition 1954 * 4th Edition 1965 * 5th Edition 1975 – * 6th Edition 1989 – * 7th Edition September 13, 2001 (851 Pages) – * 8th Edition November 28, 2011 (1072 Pages) – *9th Edition March 9, 2020 (928 Pages)

Biography

Richard G. Budynas is professor of mechanical engineering at

Rochester Institute of Technology The Rochester Institute of Technology (RIT) is a private university, private research university in Henrietta, New York, a suburb of Rochester, New York, Rochester. It was founded in 1829. It is one of only two institute of technology, institut ...

. He is author of a newly revised

McGraw-Hill McGraw Hill is an American education science company that provides educational content, software, and services for students and educators across various levels—from K-12 to higher education and professional settings. They produce textbooks, ...

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 a
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 Mechanical engineering is the study of physical machines and mechanism (engineering), mechanisms that may involve force and movement. It is an engineering branch that combines engineering physics and engineering mathematics, mathematics principl ...

at the

University of Wisconsin, Madison A university () is an institution of tertiary education and research which awards academic degrees in several academic disciplines. ''University'' is derived from the Latin phrase , which roughly means "community of teachers and scholars". Univ ...

, 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 Kolkata, also known as Calcutta (List of renamed places in India#West Bengal, its official name until 2001), is the capital and largest city of the Indian States and union territories of India, state of West Bengal. It lies on the eastern ba ...

India India, officially the Republic of India, is a country in South Asia. It is the List of countries and dependencies by area, seventh-largest country by area; the List of countries by population (United Nations), most populous country since ...

, and served as chief of the Energy Manpower and Training Project sponsored by

USAir US Airways was a major airline in the United States. It was originally founded in Pittsburgh as a mail delivery airline called All American Aviation, which soon became a commercial passenger airline. In 1953, it was renamed Allegheny Airlines an ...

Bandung Bandung is the capital city of the West Java province of Indonesia. Located on the island of Java, the city is the List of Indonesian cities by population, fourth-most populous city and fourth largest city in Indonesia after Jakarta, Surabay ...

Indonesia Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania, between the Indian Ocean, Indian and Pacific Ocean, Pacific oceans. Comprising over List of islands of Indonesia, 17,000 islands, including Sumatra, ...

References

{{DEFAULTSORT:Roark's Formulas For Stress And Strain 1938 non-fiction books Engineering textbooks Handbooks and manuals Mechanical engineering