Publication detail
Determination of Ramberg-Osgood approximation for estimation of low- temperature fracture toughness.
ŠANDERA, P. HORNÍKOVÁ, J. KIANICOVÁ, M. DLOUHÝ, I. POKLUDA, J.
English title
Determination of Ramberg-Osgood approximation for estimation of low- temperature fracture toughness.
Type
Paper in proceedings (conference paper)
Language
en
Original abstract
his article presents a new method for determination of parameters of the Ramberg-Osgood (R-O) approxi-mation of the tensile diagram based on the loading-frame displacement. This procedure was successfully verified on thesamples of the high strength steel OCHN3MFA tested at various temperatures with records of both the extensometer elon-gation and the load-frame displacement. The method can be used in the model for prediction of theKIc-value based onthe critical strain local approach. The parameters of the R-O approximation obtained from the extensometer-controlledand the load-frame controlled tests are in a very good agreement. Moreover, the experimentalKIc-value at the cryogenictemperature of 77 K and the theoretical one predicted using the loading-frame displacement data are practically identical.
Keywords in English
Ramberg-Osgood approximation, fracture toughness, cryogenic temperature, tensile test
Released
2020-11-30
Publisher
AIP Publishing LLC.
ISBN
978-0-7354-4045-6
ISSN
1551-7616
Book
Fracture and Damage Mechanics
Volume
2309
Number
1
Pages from–to
020024-1–020024-6
Pages count
6