PSI - Issue 28

Available online at www.sciencedirect.com Available online at w.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000–000

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ScienceDirect ScienceDirect

Procedia Structural Integrity 28 (2020) 2261–2266 Structural Integrity Procedia 00 (2019) 000–000

www.elsevier.com/locate/procedia

© 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo Abstract Experimental and theoretical data for the strength performance of Al-Mg aluminum alloys under tension in the quasi-static and dynamic regimes are presented. The structural-temporal fracture model coupled with Sign-Perturbed-Sums algorithm for data processing were used to investigate dependence of the alloy strength on fraction of its particular components. It was shown that higher fraction of Mg leads to higher static strength of the alloy, while its dynamic strength drops. Keywords: tension; stress rate; strength 1. Introduction The estimation of material strength properties under dynamic loading is common practical task. The experimental methods demand careful and well-organized design process in order to evaluate all factors influencing to the accuracy. An alternation of measuring parameter from the true value can have both a random term and a constant error. The second part generally depends on an experimental apparatus scheme and it can be decreased by additional adjustment and verification of the setup in whole and it is not considered at this work. The present study is focused to find a way how to evaluate an influence of random noises to obtained value of material dynamic strength parameter and calculate its accuracy of measurement. The one of peculiarities of dynamic test is the lack of experimental points caused by complication and difficulty of the process and in general there is no information about noise distribution. Hence common probability methods for the case of Gaussian distribution of random noises are not able to provide the confident result and the small quantity of data points does not allow to apply statistical analysis based on the central limit theorem. Thus, all issues mentioned above leads to the absence of standard unified engineering approach to Abstract Experimental and theoretical data for the strength performance of Al-Mg aluminum alloys under tension in the quasi-static and dynamic regimes are presented. The structural-temporal fracture model coupled with Sign-Perturbed-Sums algorithm for data processing were used to investigate dependence of the alloy strength on fraction of its particular components. It was shown that higher fraction of Mg leads to higher static strength of the alloy, while its dynamic strength drops. Keywords: tension; stress rate; strength 1. Introducti n The estimation of material strength properties under dynamic loading is common practical task. The experimental methods demand careful and well-organized design process in order to evaluate all factors influencing to the accuracy. An alternation of measuring parameter from the true value can have both a random term and a constant error. The second part generally depends on an experimental apparatus scheme and it can be decreased by additional adjustment and verification of the setup in whole and it is not considered at this work. The present study is focused to find a way how to evaluate an influence of random noises to obtained value of material dynamic strength parameter and calculate its accuracy of measurement. The one of peculiarities of dynamic test is the lack of experimental points caused by complication and difficulty of the process and in general there is no information about noise distribution. Hence common probability methods for the case of Gaussian distribution of random noises are not able to provide the confident result and the small quantity of data points does not allow to apply statistical analysis based on the central limit theorem. Thus, all issues mentioned above leads to the absence of standard unified engineering approach to 1st Virtual European Conference on Fracture Effect of Mg on Dynamic Properties of Al-Mg Alloys A. D. Evstifeev a , G. A. Volkov b * a Research Institute of Mechanics, Lobachevsky National State Nizhny Novgorod Research University, 23 Prospekt Gagarina (Gagarin Avenue) BLDG 2, Nizhny Novgorod, 603950, Russia b St. Petersburg State University, Universitetskaya Embankment, 7/9, St.-Petersburg,199034, Russia 1st Virtual European Conference on Fracture Effect of Mg on Dynamic Properties of Al-Mg Alloys A. D. Evstifeev a , G. A. Volkov b * a Research Institute of Mechanics, Lobachevsky National St te Nizhny Novg rod Research University, 23 Prospekt Gagarina (Gagarin Avenue) BLDG 2, Nizhny Novgorod, 603950, Russia b St. Petersburg State University, Universitetskaya Embankment, 7/9, St.-Petersburg,199034, Russia

* Corresponding author. Tel.: +7-911-252-1801. E-mail address: g.volkov@spbu.ru

2452-3216 © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo 10.1016/j.prostr.2020.11.059 2452-3216 © 2020 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo 2452-3216 © 2020 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo * Corresponding author. Tel.: +7-911-252-1801. E-mail address: g.volkov@spbu.ru