TY - JOUR

T1 - Investigating the impact of manufacturing conditions on crack growth rate in nitrile butadiene rubber for enhanced service life – Part 01

AU - Gehling, Tobias

AU - Kerschbaumer, Roman Christopher

AU - Pinter, Gerald Gerhard

AU - Fasching, Michael Andreas

AU - Schwarz, Thomas

AU - Schieppati, Jacopo

N1 - Funding Information: The research work of this paper was performed at the Polymer Competence Center Leoben GmbH (PCCL, Austria) within the framework of the COMET-program of the Federal Ministry for Climate Action, Environment, Energy, Mobility, Innovation and Technology and the Federal Ministry for Digital and Economic Affairs with contributions by Montanuniversitaet Leoben (Materials Science and Testing of Polymers), and SKF Sealing Solutions Austria GmbH. The PCCL is funded by the Austrian Government and the State Governments of Styria , Lower Austria, and Upper Austria. Some author contributions came under the COMET-project “Polymers4Hydrogen” (project-no.: 21647053). Funding Information: The authors declare the following financial interests/personal relationships which may be considered as potential competing interests:Tobias Gehling reports financial support was provided by Austrian Government and the State Governments of Styria, Lower Austria, and Upper Austria.The research work of this paper was performed at the Polymer Competence Center Leoben GmbH (PCCL, Austria) within the framework of the COMET-program of the Federal Ministry for Climate Action, Environment, Energy, Mobility, Innovation and Technology and the Federal Ministry for Digital and Economic Affairs with contributions by Montanuniversitaet Leoben (Materials Science and Testing of Polymers), and SKF Sealing Solutions Austria GmbH. The PCCL is funded by the Austrian Government and the State Governments of Styria, Lower Austria, and Upper Austria. Some author contributions came under the COMET-project “Polymers4Hydrogen” (project-no.: 21647053). Publisher Copyright: © 2023 The Authors

PY - 2023/10/7

Y1 - 2023/10/7

N2 - Extended service life of components is playing an increasingly important role in society and economy. Accordingly, this also applies to elastomeric materials, which are used for example for tires, seals, and hoses. These are often exposed to cyclic loading, with crack initiation and growth playing a decisive role. Corresponding phenomena have been investigated for many years and are still not fully understood. For the fatigue behavior, the crosslinking state of the material is of particular importance. This is accompanied by various production parameters, such as processing temperature and curing time, which have been of little importance in research to date. For this reason, plain strain test specimens out of nitrile butadiene rubber (NBR) were produced by injection molding at different mold temperatures and crosslinking times in the present work. With the aid of these, the crack growth rate at different crosslinking states under cyclic loading was investigated. It has been shown that a longer crosslinking time toward fully cured specimens results in a 20% reduction in dissipated energy, with a corresponding increase of the crack growth rate by the factor of 100. Furthermore, a 20 K increase in mold temperature during manufacturing of fully cured specimens leads to a four times slower crack growth.

AB - Extended service life of components is playing an increasingly important role in society and economy. Accordingly, this also applies to elastomeric materials, which are used for example for tires, seals, and hoses. These are often exposed to cyclic loading, with crack initiation and growth playing a decisive role. Corresponding phenomena have been investigated for many years and are still not fully understood. For the fatigue behavior, the crosslinking state of the material is of particular importance. This is accompanied by various production parameters, such as processing temperature and curing time, which have been of little importance in research to date. For this reason, plain strain test specimens out of nitrile butadiene rubber (NBR) were produced by injection molding at different mold temperatures and crosslinking times in the present work. With the aid of these, the crack growth rate at different crosslinking states under cyclic loading was investigated. It has been shown that a longer crosslinking time toward fully cured specimens results in a 20% reduction in dissipated energy, with a corresponding increase of the crack growth rate by the factor of 100. Furthermore, a 20 K increase in mold temperature during manufacturing of fully cured specimens leads to a four times slower crack growth.

KW - Crack growth rate

KW - Dissipated energy

KW - Elastomer

KW - Fatigue

KW - Manufacturing temperature

UR - http://www.scopus.com/inward/record.url?scp=85173587353&partnerID=8YFLogxK

U2 - 10.1016/j.rineng.2023.101484

DO - 10.1016/j.rineng.2023.101484

M3 - Article

AN - SCOPUS:85173587353

VL - 20.2023

JO - Results in Engineering

JF - Results in Engineering

SN - 2590-1230

IS - December

M1 - 101484

ER -