Determination of Ramberg-Osgood approximation for estimation of low- temperature fracture toughness.

článek ve sborníku ve WoS nebo Scopus

angličtina

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.

Ramberg-Osgood approximation, fracture toughness, cryogenic temperature, tensile test

ŠANDERA, P.; HORNÍKOVÁ, J.; KIANICOVÁ, M.; DLOUHÝ, I.; POKLUDA, J.

30. 11. 2020

AIP Publishing LLC.

978-0-7354-4045-6

Fracture and Damage Mechanics

1551-7616

AIP Conference Proceedings

2309

1

Spojené státy americké

020024-1

020024-6

6