PREFACE
CHAPTER 1-TENSION
1. Introduction
2. Hooke's Law
3. Simple and Compound Bars
*4. Trusses
*5. Statistically Indeterminate Truss
CHAPTER II-TORSION
6. Shear Stress
7. Solid Circular Shafts
8. Examples; Hollow Shafts
9. Closely Coiled Helical Springs
CHAPTER III-BENDING
10. Bending Moment Diagrams
11. Pure Bending Stress
12. Shear Stress Distribution
13. Applications
CHAPTER IV-COMPOUND STRESSES
14. Bending and Compression
15. Mohr's Circle
16. "Bending, Shear, and Torsion"
17. Theories of Strength
CHAPTER V-DEFLECTIONS OF BEAMS
18. The Differential Equation of Flexure
19. The Myosotis Method
20. Statistically Indeterminate Beams
*21. The Area-moment Method
22. Variable Cross Sections; Shear Deflection
CHAPTER VI-SPECIAL BEAM PROBLEMS
23. Beams of Two Materials
24. Skew Loads
*25. The Center of Shear
*26. Reinforced Concrete
*27. Plastic Deformations
CHAPTER VII-CYLINDERS AND CURVED BARS
28. Riveted Thin-walled Pressure Vessels
*29. Thick-walled Cyclinders
*30. Thin Curved Bars
*31. Thick Curved Bars
CHAPTER VIII-THE ENERGY METHOD
32. Stored Elastic Energy
33. The Theorem of Castigliano
*34. Statically Indeterminate Systems
*35. Maxwell's Reciprocal Theorem
CHAPTER IX-BUCKLING
36. Euler's Column Theory
*37. Other End Conditions
38. Practical Column Design
CHAPTER X-EXPERIMENTAL ELASTICITY
*39. Photoelasticity
40. Strain Gages
41. Fatigue
*42. Strength Theories; Conclusion
PROBLEMS
ANSWERS TO PROBLEMS
LIST OF FORMULAS
INDEX

Among introductory texts on the strength of materials, this work is particularly distinguished. It was originally developed by Professor Den Hartog to meet the needs of engineering students at M.I.T. for a sound yet lucid first course in strength of materials. As such it has also enjoyed wide popularity in engineering schools throughout the world.
But the book was remarkable in a number of other ways, so that it has become one of the favorite refresher and reference works for engineers as well as a popular self-study text. Perhaps the chief reason for this is that in addition to all the customary elementary material on the subject (i.e., clear instructions to the fundamentals of tension, torsion, bending, compound stresses, deflection of beams, etc.) it also contains a considerable amount of more advanced material concerning methods of great practical value to working engineers which are not usually included in introductory texts. This material is presented in starred sections (which may be omitted on a first reading without interrupting the flow of the presentation) and includes a full treatment of the Mohr circle and its application to the determination of moments of inertia and strains as well as stresses; a lucid elementary presentation of the theory of the center of shear; and one of the few elementary presentations of the theory of the center of shear; and one of the few elementary discussions of the "Myosotis" method of calculating beam deflections, a method which often possesses considerable advantages over the more usual methods involving moment-area or the differential equation of bending.
Other material not usually found in elementary texts but which are frequently of great value to the practicing engineer are the discussions of the statically indeterminate truss, reinforced concrete, plastic deformations, thick-walled cylinders, thick curved bars, Maxwell's Reciprocal Theorem, and photoelasticity.
In all sections, both general principles and concrete applications are given. Another feature which readers have found unusually helpful is the 85-page section of 350 problems which gives the student practice in techniques and further illustrates applications. All problems are complete with answers.

J. P. Den Hartog: The Reprint Engineer
J. P. Den Hartog (1901?1989), who taught for most of his career at MIT, was one of the founders of the Dover reprint program in engineering. As the author of several books that Dover reprinted and still has in print, and as an advisor from the 1950s until just a few years before his death in 1989, Professor Den Hartog gave invaluable advice concerning books of lasting interest and importance in his field.
Not many books in engineering have a productive shelf life spanning several decades. Among the exceptions are these four books of Professor Den Hartog, which Dover reprinted and occasionally revised in later printings from 1961 through 1987: Mechanics, 1961, Strength of Materials, 1961, Mechanical Vibrations, 1985, and Advanced Strength of Materials, 1987. Still widely read and cited by authors in these areas, Den Hartog's books are a tribute to his gift for exposition and clarity.
The J. P. Den Hartog Award, established in 1987, is presented in recognition of lifetime contributions to the teaching and practice of vibration engineering.