Microcrack under Internal Pressure at Dislocation Defect
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Date
2019
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier BV
Abstract
EN: By solving the problem of the theory of elasticity for a boundary dislocation with a cavity on its continuation, a stress-strain state
in a solid crystalline body is determined. The correlation for calculating the energy of a body with a dislocation crack under
pressure is obtained. The geometric parameters of a crack-like dislocation cavity are calculated. The values of equilibrium and
non-equilibrium crack lengths are established on this basis. Also the value of the critical pressure at which the dislocation crack
start begins is received. Stress intensity factors for the dislocation crack are obtained and calculated. Physical essence of fracture
toughness is established using stress intensity factors.
Description
V. Kovalchuk: ORCID 0000-0003-4350-1756
Keywords
fracture mechanics, dislocation crack, internal pressure, energy of deformation, stress intensity factor, КРС (ЛФ)
Citation
Stashchuk, M., Hembara N., Kovalchuk V. Microcrack under Internal Pressure at Dislocation Defect. Procedia Structural Integrity. 2019. Vol. 16 : 6th International Conference on Fracture Mechanics of Materials and Structural Integrity, Lviv, 3–6 June 2019. P. 252–259. URL: https://www.sciencedirect.com/science/article/pii/S2452321619301581 (10.02.20). DOI: 10.1016/j.prostr.2019.07.049.