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CA-DOT-TL-6666-1-74-181. REPORT No. 2. GOVERNMENT ACCESSION No. 3. RECIPIENT'S CATALOG No.
Dynamic Fracture Toughness Determination By TheInstrumented Charpy Impact Test
4. TITLE AND SUBTITLE
June 19745. REPORT DATE
6. PERFORMING ORGANIZATION
Smith, Roger D.; Jonas, Paul g.7. AUTHOR(S)
CA-DOT-TL-6666-1-74-188. PERFORMING ORGANIZATION REPORT No.
Transportation Laboratory5900 Folsom BoulevardSacramento, California 95819
9. PERFORMING ORGANIZATION NAME AND ADDRESS 10. WORK UNIT No.
11. CONTRACT OR GRANT No.
Department of TransportationDivision of HighwaysSacramento, California 95807
12. SPONSORING AGENCY NAME AND ADDRESS Final13. TYPE OF REPORT & PERIOD COVERED
19-312114. SPONSORING AGENCY CODE
Final report for study titled "K ID Determination from the Instrumented Precracked Charpy Impact Test".15. SUPPLEMENTARY NOTES
The fracture behavior under dynamic load rates of seven heats of ASTM A514/517 steel (Grades H and F) is investigated. Materialproperties including dynamic yield strength and dynamic fracture toughness are determined using the instrumented Charpy impacttest. These dynamic properties are contrasted with previously determined static propertiers for the same steel heats. Also discussedis the determination of nil ductility transition temperature (NDTT) and the analysis of the different cracking energy components(initiation and propagation) from Charpy impact tests. Alleged correlations between Charpy impact energy and dynamic fracturetoughness are evaluated with respect to this study. The practicality of a fracture control program for bridge steel based on dynamicloading behavior is discussed.
16. ABSTRACT
Dynamic fracture toughness, brittle fracture, steel toughness, instrumented impact test, fracture mechanics, Charpy impact test.17. KEYWORDS
14818. No. OF PAGES:
http://www.dot.ca.gov/hq/research/researchreports/1974-1975/74-18.pdf19. DRI WEBSITE LINK
This page was created to provide searchable keywords and abstract text for older scanned research reports.November 2005, Division of Research and Innovation
74-18.pdf20. FILE NAME
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