PSI - Issue 20

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Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2018) 000–000 Structural Integrity Procedia 00 (2018) 000–000

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Procedia Structural Integrity 20 (2019) 17–23

1st International Conference on Integrity and Lifetime in Extreme Environment (ILEE-2019) Basic approaches to ensuring structural integrity of technical systems D. Reznikov a, * a Mechanical Engineering Research Institute, RAS. 4 Maly Kharitonievsky lane, Moscow,101990, Russia Structural reliability of technical systems is to be insured in the presence of high level of uncertainty related to natural variability of loads acting on the system, scatter of mechanical properties of structural materials, inaccuracies of geometrical dimensions, imperfections of test equipment and design models. In the view of these uncertainties two basic approaches to securing structural integrity can be distinguished: deterministic (standard-based) approach founded on the application of the so called safety factors that are introduced into the design equation to compensate uncertainties; and probabilistic (reliability-based) approach that requires that the probability of structural failure occurrence not to exceed some allowable limiting value considered acceptable by society at the current stage of the technological development, available resources and the willingness of the society to pay for the implementation of protection measures. The paper presents a comparative assessment of deterministic and probabilistic approaches to securing structural integrity of technical systems subjected to various types of loading regimes. The condition of the equivalence of these two basic approaches to securing structural integrity is considered. 1st International Conference on Integrity and Lifetime in Extreme Environment (ILEE-2019) Basic approaches to ensuring structural integrity of technical systems D. Reznikov a, * a Mechanical Engineering Research Institute, RAS. 4 Maly Kharitonievsky lane, Moscow,101990, Russia Abstract Structural reliability of technical systems is to be insured in the presence of high l vel of uncert inty relat d to natural variability of loads acting on th system, scatter of mechanical properties of structural materials, inaccuracies of geometrical dimensions, imperfectio s of test equipment and design models. In the view of these uncertainties two basic approaches to securing structural integrity can be distinguished: deterministic (standard-based) approach founded on the application of the so called safety factors that are introduced into the design equation t ompensate uncertainties; and pro abilistic (reliability-bas d) approach that requires that the probability of structural failure occurrenc not to exceed s me allowabl limiting value considered acceptable by society at the current stage of the technological development, available resources nd the willingness of the society to pay for the im lementation of protection measures. Th paper presents a comparative assessment of eterministic and probabilistic approaches to securing structural integrity of technical systems subjected to various types of loading regimes. The condition of the equivalence of these two basic approaches to securing structural integrity is considered. Abstract

© 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ILEE-2019 organizers © 2019 The Author(s). Published by Elsevier B.V. Peer-review under responsibility of the ILEE-2019 organizers © 2019 The Author(s). Published by Elsevier B.V. Peer-review under responsibility of the ILEE-2019 organizers Keywords: stractural integrity; safety factor; probability of failure Keywords: stractural integrity; safety factor; probability of failure

2452-3216 © 2019 The Author(s). Published by Elsevier B.V. Peer-review under responsibility of the ILEE-2019 organizers 2452 3216 © 2019 Th Author(s). Publis d by lsevier B.V. Peer-review under responsibility of the ILEE-2019 organizers * Correspon ing author. Tel.: +7-495-623-5835; fax: +7-495-623-5835. E-mail address: imashreznikoff@yandex.ru. * Corresponding author. Tel.: +7-495-623-5835; fax: +7-495-623-5835. E-mail address: imashreznikoff@yandex.ru.

2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ILEE-2019 organizers 10.1016/j.prostr.2019.12.109