Life cycle assessment of technical systems taking into consideration degradation processes in materials of constructions

• Autorzy: Stotsko Z. , Kuzin M.

Identyfikatory

DOI

10.5604/01.3001.0011.5724

• Języki publikacji: EN

Abstrakty

EN

Purpose: In the engineering analysis and transport forensic examination, there are often arise problems in establishing the causes and mechanism for the destruction of structural elements. At the moment, such problems are poorly formalized and practically do not take into account the degradation of the material and the gradient of its properties when destroyed. The purpose of this article was to build a methodology for determining the distribution of material properties at the initial time and establishing its compliance with the requirements of regulatory documentation. Design/methodology/approach: As a technique for solving the problem, was proposed the expansion of a function in a given basis with subsequent refinement of the solution using iterative algorithmic schemes. Findings: Using the developed approaches, it is established that in the surface layers of 12X18H10T steel (AISI 321), after technological modification under the conditions of laser doping, functional-gradient layers are formed with the material viscosity level characteristics at 0.8, which corresponds to the established norms, and their destruction occurred as a result of excessive loads. Practical implications: With the using of the developed methods makes it possible to solve the problem of technical forensic examination to determine compliance to the requirements the properties of functional gradient materials in initial time. Originality/value: The technique of solving inverse problems of fracture mechanics for functional gradient materials is shown for the first time.

Słowa kluczowe

EN

life cycle; mathematical model; degradation of materials; inverse problems in mechanics

PL

cykl życia; model matematyczny; degradacja materiału

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2018
• Tom: Vol. 89, nr 1
• Strony: 5--8
• Opis fizyczny: Bibliogr. 9 poz.

Twórcy

autor

Stotsko Z.

• Lviv Polytechnic National University, 12 Bandera street, 79013, Lviv, Ukraine

autor

Kuzin M.

• Lviv Polytechnic National University, 12 Bandera street, 79013, Lviv, Ukraine

Bibliografia

• [1] L.A. Dobrzański, Engineenng Materials and Materials Design, Fundamentals of Materials Science and Physical Metallurgy, WNT, Warsaw, 2006 (in Polish).
• [2] Yu.V. Codra, Z.A. Stotsko, Technological machines. Calculation and design, Beskid Publishing House, Lviv, 2004 (in Ukrainian).
• [3] N. Kuzin, T.N. Meshcheryakova, O. Kuzin, E. Kurileva, N. Gordinskaya, The use of mathematical and computer modelling in solving the problems of rail transport expert examination, Journal of Applied Mathematical and Computational Mechanics 15/4 (2016) 93-98.
• [4] J.A. Collins, Failure of Materials in Mechanical Design, John Wiley and Sons, New York, 2002.
• [5] I.A Volkov, Equations of state of viscoelastoplastic media with damages, Fizmatlit, Moscow, 2008 (in Russian).
• [6] V.P. Golub, Constitutive equations in nonlinear damage mechanics, International Applied Mechanics 29/10 (1993) 794-804.
• [7] N.O. Kuzin, A mathematical model describing the variation in material properties, International Applied Mechanics 50/4 (2015) 474-479.
• [8] M.O. Kuzin, Variational formulation of the problem of providing long-term equilibrium of near-surface layers of metallic systems taking into account the conditions of frictional loads, Ukrainian Academy of Printing, Proceedings: Scientific and Technical Collection 2/39 (2012) 168-172 (in Ukrainian).
• [9] A.A. Lebedev, B.I. Kovalchuk, F.F. Giginyak, V.P. Lamashevskii, Mechanical properties of structural materials under complex stress state, A.A. Lebedev (Ed.), In Yure, Kiev, 2003 (in Russian).

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018)