TY - JOUR A1 - Zaghdoudi, Maha A1 - Kömmling, Anja A1 - Jaunich, Matthias A1 - Wolff, Dietmar T1 - Erroneous or Arrhenius: A Degradation Rate-Based Model for EPDM during Homogeneous Ageing N2 - To improve the predictive capability of long-term stress relaxation of elastomers during thermo-oxidative ageing, a method to separate reversible and irreversible processes was adopted. The separation is performed through the analysis of compression set after tempering. On the Basis of this separation, a numerical model for long-term stress relaxation during homogeneous ageing is proposed. The model consists of an additive contribution of physical and chemical relaxation. Computer simulations of compression stress relaxation were performed for long ageing times and the results were validated with the Arrhenius treatment, the kinetic study and the time-temperature superposition technique based on experimental data. For chemical relaxation, two decay functions are introduced each with an activation energy and a degradative process. The first process with the lower activation energy dominates at lower ageing times, while the second one with the higher activation energy at longer ageing times. A degradation-rate based model for the evolution of each process and ist contribution to the total system during homogeneous ageing is proposed. The main advantage of the model is the possibility to quickly validate the interpolation at lower temperatures within the range of slower chemical processes without forcing a straight-line extrapolation. KW - Kinetic study KW - Arrhenius KW - TTS KW - Modeling KW - Chemical processes KW - Stress relaxation PY - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:b43-512931 SN - 2073-4360 VL - 12 IS - 9 SP - 1 EP - 21 AN - OPUS4-51293 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kolbe, Matthias A1 - Theil, Benjamin A1 - Göder, R. T1 - Untersuchungen zur Explosivbearbeitung von Bauteilen in Schiffsmotoren N2 - Vorstellung des Plattierens von Metallen mit Hilfe von Explosivstoffen. T2 - 42. Informationstagung Sprengtechnik CY - Siegen, Germany DA - 15.10.2021 KW - Explosivstoffe KW - Sprengplattieren KW - TTS PY - 2021 AN - OPUS4-53632 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kolbe, M. A1 - Theil, Benjamin T1 - Explosivbearbeitung von Motorenbauteilen N2 - Darstellung von Explosivplattieren als Fügeverfahren zur Herstellung von Anfangsformen zur Herstellung von Ventilen und Kolbenbodenteilen für maritime Motorenanwendungen. T2 - 27. Sächsiche Fachtagung für Umformtechnik, TU BA Freiberg CY - Online meeting DA - 18.03.2021 KW - TTS KW - Explosivplattieren KW - Explosivstoffe KW - Reibschweißen KW - Fügen PY - 2021 AN - OPUS4-52294 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -