Assessment of hydrogen effect on fracture resistance under complex-mode loading

Panasyuk, V. V.; Ivanyts’kyi, Ya. L.; Hembara, О. V.

doi:10.1016/j.engfracmech.2011.12.010

Cited by 16 publications

(2 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Experimental studies [ 8 , 18 ] showed that the damage accumulation and fracture of cylindrical steel samples under static tension begin in the internal volumes of the material and not from the surface. This is due to the inhomogeneity of the stress-strain state in the zone of neck formation [ 19 , 20 ]. This inhomogeneity depends on the applied load, the prestrain, and the influence of the environment [ 21 , 22 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

A New Energy Approach to Predicting Fracture Resistance in Metals

et al. 2023

View full text Add to dashboard Cite

To ensure the reliability and durability of structural elements, modern approaches require data characterizing the local stress-strain state of the material in risk zones. In order to predict the fracture resistance of structural elements, a theoretical-experimental method based on the damage accumulation model using the energy approach is proposed. One of the unique characteristics of the proposed approach is that it uses local parameters of the stress-strain state, which are determined using a highly accurate and easy-to-use noncontact method of optical–digital image correlation (ODIC). This can be used both in laboratory conditions and for structural elements under real operating conditions. The proposed method of plotting stress–strain curves makes it possible to determine the true stresses near the concentrators in structural elements under a complex load. Using these diagrams in calculations and the finite element method (FEM), a study of local strain not only of the surface, but also of the internal volumes of the material was carried out. The damage parameter is introduced as the ratio of the elastoplastic strain energy of the local volume to its critical value. It is confirmed that the damage of the sample material starts from its centre. It was established that the damage parameter in the centre of the sample is 25–35% higher than its value on the surface of the sample.

show abstract

Section: Introductionmentioning

confidence: 99%

A New Energy Approach to Predicting Fracture Resistance in Metals

et al. 2023

View full text Add to dashboard Cite

show abstract

“…For the solution of these questions specialists conduct more precise calculation of tensionally deformed state of elements of turbine equipment under the influence of operating loading with the use of modern calculation packages, and also prognosis of crack growth through making use approaches of linear fracture mechanics (Vasovic et al, 2014;Belogurov et al, 2004;Fishgoit and Kolachev, 1997;Liu and Macdonald, 1997;Jovicic et al, 2009;Kim, 1999;Panasyuk et al, 2012). By results of conducted calculations, recommendations about expedience of repair and terms of further use in the case of a sample of the crack until the next inspection are given.…”

Section: Introductionmentioning

confidence: 99%

Influence of temperature and hydrogen on fatigue fracture of 10Kh15N27T3V2MR steel

Hembara¹,

Chepil²,

Hembara³

et al. 2020

Journal of Theoretical and Applied Mechanics

View full text Add to dashboard Cite

A theoretical and experimental approach to prognosis of fatigue crack growth behavior and determination of the remaining resource of elements of constructions under the influence of temperature and hydrogen is discussed in the paper. Kinetic fatigue fracture diagrams of austenitic steel of 10Kh15N27T3V2MR were experimentally built and analytically described at different temperatures in a neutral environment and in hydrogen. The threshold and critical values of the stress intensity factor (SIF) were found. The durability of a turbine disk was evaluated. It is found that hydrogen reduced the remaining resource of this structural element almost by 2-3 times.

show abstract