PSI - Issue 20

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

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 20 (2019) 154–160

1st International Conference on Integrity and Lifetime in Extreme Environment (ILEE-2019) Damage, brittle fracture resistance and working capacity of a KAMAZ vehicle leaf spring when operating in the North Yakovleva S. P. a, *, Buslaeva I. I. b , Makharova S. N. a , Levin A. I. b a Siberian Branch of the Russian Academy of Sciences, Larionov Institute of Physical-Technical Problems of the North, 1 Oktyabrskaya Street, Yakutsk, 677980, Russia a Siberian Branch of the Russian Academy of Sciences, Yakut Scientific Centre, 2 Petrovskogo Street, Yakutsk, 677000, Russia Abstract Due to importance of developing the North and Arctic territories, it is essential to ensure working capacity of machinery in cryolithozone. To solve these problems, it is necessary to study accumulation of structural damage and changes in material properties. The purpose of this article is to study influence of operation in the northern roads conditions on fatigue damage, brittle fracture resistance and the working capacity of a leaf spring of a KAMAZ truck widely used in Yakutia. Methods of mathematical statistics, metallography, microindentation, standard mechanical tests, etc. were applied. Results of analysis of distribution of the KAMAZ vehicle springs failures on the months of the year are given, taking into account the seasonal changes in a profile of the typical for Yakutia gravel road. To assess the fatigue damage of metal, the structural and statistical study of microhardness (microdamage) and porosity (mesodamage) was carried out. Impact toughness values were determined and it was found that the accumulated damage did not lead to metal embrittlement at low temperatures. The more significant impact of the cryolithozone road microprofile on the working capacity of the KAMAZ truck springs as compared to the factor of the low temperatures has been substantiated. 1st International Conference on Integrity and Lifetime in Extreme Environment (ILEE-2019) Damage, brittle fracture resistance and working capacity of a KAMAZ vehicle leaf spring when operating in the North Yakovleva S. P. a, *, Buslaeva I. I. b , Makharova S. N. a , Levin A. I. b a Siberian Branch of the Russian Academy of Sciences, Larionov Institute of Phy ic l-Technical Problems of the North, 1 Ok yabrskaya Street, Yakutsk, 677980, R ssia a Siberian Branch of the Russian Academy of Sciences, Yakut Scientific Centre, 2 Petrovskogo Street, Yakutsk, 677000, Russia Abstract Due to importance f dev loping th Nor h a d Arctic terri ories, it is essential to ensure workin c pacity of machinery in c yolithozone. To s lve these problems, it is necessary t study accumulati n of st uctural amage and changes in material prope ties. The purpose of this a ticle is to study influence of operation in the northe n roads conditions o fatig e damage, brittle fr cture resistance and the w rking capa ity of leaf pring of a KAMAZ ruck wid ly used in Yakutia. Method ma hematical statistics, metallography, microind ntation, sta dard mechanic l tests, etc. were applied. Results of analysis of distribution KAMAZ vehicle springs failures on the months of the year are given, taking into account the seasonal changes in a profile of the typical for Yakutia gravel road. To assess the fatigue da age of metal, the structural and stat stical study of microhardness (microd mage) and porosity (mesoda age) was carri d ou . Impact toughn s values were determined and it was found that th accu ulated damage did not lead to metal embrittlement at low tem erature . The more signific n impact of the cryolithozone road microprofile on the working capacity of the KAMAZ truck springs as compared to the factor of the low temperatures has been substantiated.

© 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 Autho (s). Published by Elsevier B.V. Peer-review under responsibility of the ILEE-2019 organizers

Keywords: leaf spring; silicon steel; working capacity; road profile; fatigue failure; damage; impact toughness Keywords: leaf spring; silicon steel; working capacity; road profile; fatigue failure; damage; impact toughness

* Corresponding author. Tel.: +8-411-239-0577. E-mail address: spyakovleva@yandex.ru * Correspon ing author. Tel.: +8-411-239-0577. E-mail address: spyakovleva@yandex.ru

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

2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ILEE-2019 organizers 10.1016/j.prostr.2019.12.132