ENERGY APPROACH IN MODERN FRACTURE MECHANICS
DOI:
https://doi.org/10.15407/dopovidi2025.06.061Keywords:
energy approach, mathematical model, crack growth, energy balance, residual life, aggressive environmentsAbstract
A general energy approach has been formulated for developing mathematical models of local fracture (crack growth) and methods for assessing the residual life of structural elements subjected to mechanical loading in aggressive environments. The approach is based on a mechanical analogue of the first law of thermodynamics, reflecting the balance of energy components and the balance of their rates of change, written for an elementary fracture event (a crack-advance increment). The influence of neutron irradiation and hydrogen-containing environments on the service life of thin-walled structural elements with cracks under high temperature conditions has been evaluated. A method for predicting the remaining service life under maneuvering loading has been developed, based on which the service life of a rectification column has been assessed, taking into account wind loads under atmospheric corrosion conditions.
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References
Panasyuk, V. V. (1991). Mechanics of quasi-brittle fracture of materials. Kyiv: Naukova Dumka (in Russian).
Savruk, M. P. (1981). Two-dimensional elasticity problems for bodies with cracks. Kyiv: Naukova Dumka (in Russian).
Andreykiv, A. E. (1982). Three-dimensional problems of crack theory. Kyiv: Naukova Dumka (in Russian).
Owen, D. R. J. & Luxmoore, A. R. (Eds.). (1980). Numerical methods in fracture mechanics (Vol. 2). Pineridge Press.
Andreikiv, O. Ye. & Hembara, O. V. (2008). Fracture mechanics and durability of metallic materials in hydrogen- containing environments. Kyiv: Naukova Dumka (in Ukrainian).
Andreykiv, O. Ye., Skalskyi, V. R. & Dolinska, I. Ya. (2017). Slow fracture of materials under local creep. Lviv: Ivan Franko National University of Lviv (in Ukrainian).
Andreykiv, O. Ye., Pustovyi, V. M., Rudavskyi, D. V., Dolinska, I. Ya. & Semenov, P. O. (2017). Methods for assessing the residual strength and life of structural elements based on non-destructive testing data. Lviv: Prostir-M (in Ukrainian).
Garofalo, F. (1965). Fundamentals of creep and creep-rupture in metals. New York: MacMillan.
Babii, L., Student, O. & Zahorskyi, A. (2008). Properties of 15Kh2MFA pressure-vessel steel under creep conditions in gaseous hydrogen. Phys.-Chem. Mech. Mater., 1 Spec. Iss., No. 7, pp. 100-105 (in Ukrainian).
Holt, R. A. (2008). In-reactor deformation of cold-worked Zr–2,5Nb pressure tubes. J. Nucl. Mater., 372, Is. 1-3, pp. 182-214. https://doi.org/10.1016/j.jnucmat. 2007.02.017
Chopra, O. K., Alexandreanu, B., Gruber, E. E., Daum, R. S. & Shack, W. J. (2005). Crack growth rates of irradiated austenitic stainless steel weld heat affected zone in BWR environments. Argonne: Argonne National Laboratory. https://doi.org/10.2172/925223
Chopra, O. K. & Shack, W. J. (2008). Crack growth rates and fracture toughness of irradiated austenitic stainless steels in BWR environments. Argonne: Argonne National Laboratory. https://doi.org/10.2172/932944
Kurata, Y., Itabashi, Y., Mimura, H., Kikuchi, T., Amezawa, H., Shimakawa, S., Tsuji, H. & Shindo, M. (2000). In-pile and post-irradiation creep of type 304 stainless steel under different neutron spectra. J. Nucl. Mater., 283–287, Pt. 1, pp. 386-390. https://doi.org/10.1016/S0022-3115(00)00107-0
Lokoshchenko, A. M., Il’in, A. A., Mamonov, A. M. & Nazarov, V. V. (2008). Analysis of the creep and long-term strength of VT6 titanium alloy with preliminarily injected hydrogen. Mater. Sci., 44, No. 5, pp. 700-707. https:// doi.org/10.1007/s11003-009-9128-0
Andreikiv, О. E., Nykyforchyn, H. М., Shtoiko, І. P. & Lysyk, A. R. (2017). Evaluation of the residual life of a pipe of oil pipeline with an external surface stress-corrosion crack for a laminar flow of oil with repeated hydraulic shocks. Mater. Sci., 53, No. 2, pp. 216-226. https://doi.org/10.1007/s11003-017-0065-z
Murakami, Y. (Ed.). (1987). Stress intensity factors handbook (In 2 Vols.). Oxford, New York: Pergamon Press.
Pustovoi, V. N. (1992). Metal structures of lifting machines. Fracture and prediction of residual life. Moscow: Transport (in Russian)
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