Prediction of the Fatigue Crack Propagation Rate in Metals on the Basis of the Local Fracture Energy Criterion

V.T. Troshchenko; P.V. Yasniy; V.V. Pokrovsky

doi:doi:10.1051/jp4:1996644

Numéro		J. Phys. IV France Volume 06, Numéro C6, Octobre 1996 EUROMECH - MECAMAT'96 1st European Mechanics of Materials Conference on Local Approach to Fracture '86 - 96'


Page(s)		C6-441 - C6-447
DOI		https://doi.org/10.1051/jp4:1996644

EUROMECH - MECAMAT'96
1st European Mechanics of Materials Conference on Local Approach to Fracture '86 - 96'

J. Phys. IV France 06 (1996) C6-441-C6-447
DOI: 10.1051/jp4:1996644

Prediction of the Fatigue Crack Propagation Rate in Metals on the Basis of the Local Fracture Energy Criterion

V.T. Troshchenko¹, P.V. Yasniy² and V.V. Pokrovsky¹

¹ Institute for Problems of Strength, National Academy of Sciences of Ukraine, 2 Timiryazevskaya Str., Kyev 252014, Ukraine
² Institute for Instrument Engineering, 56 Ruska Str., Ternopol, Ukraine

Abstract
A model of fatigue crack propagation has been proposed and substantiated which is based on the analysis of the fatigue damage energy accumulation at the crack tip involving the use of the fatigue fracture energy criterion, which makes it possible to separate the dangerous part of the total energy of inelastic deformation. The investigation has been made into the regularities of cyclic inelastic deformation and crack propagation rate in steel 15Kh2MFA of different heat treatment and titanium alloy VT6S. A satisfactory agreement has been found between the theoretical and experimental rates of fatigue crack propagation