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The results of a recent study of the dynamic and static fracture toughness behavior, over a wide-temperature range, of eight different bridge steels are presented. These results are discussed in connection with current toughness requirements for bridge steels. Strain rate and temperature effects on fracture toughness are examined.
crack propagation, steels, impact tests, bridge design, toughness
Professor of Mechanical Engineering and Mechanics, Lehigh University, Materials Research Center, Bethlehem, Pa.
Senior engineer, Cryogenic Systems Division, Air Products and Chemicals, Inc., Allentown, Pa.
Visiting professor, University of Maryland, College Park, Md.