TY - CONF A1 - Qiao, Linan A1 - Herbrich, Uwe A1 - Nagelschmidt, Sven A1 - Keller, Christian T1 - A New Time-Temperature Equivalent Formulation for the Description of Thermo-rheologically Complex Behaviour T2 - IC-RMM4 - 4th International Conference on Rheology and Modeling of Materials N2 - Compared with the original time-temperature superposition (TTS) principle, an extended non-linear time-temperature equivalent (TTE) principle is suggested in this work. Results shown us, all application of TTS and most of the TTE parameters, for example, the Orr-Sherby-Dorn, Manson-Succop, Larson-Müller, Manson-Haferd, Mendelson-Roberts-Manson parameters and the more general ‘single metamodel’ from Haque–Stewart are special cases of the new suggested principle. The merits of this new method are discussed. T2 - 4th International Conference on Rheology and Modeling of Materials CY - Miskolc-Lillafüred, Hungary DA - 07.10.2019 KW - Scale/shift factor and form/stretchFactor of time-temperature relation KW - Time-temperature superposition/equivalent principle KW - Thermo-rheologically simple/complex behaviour PY - 2019 AN - OPUS4-50772 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Qiao, Linan A1 - Keller, Christian A1 - Nagelschmidt, Sven A1 - Wolff, Dietmar T1 - Three-dimensional finite element analysis of O-ring metal seals considering manufacture tolerances N2 - Metal seals are widely used in various industrial branches with severe working conditions (e.g. high pressure, high temperature, corrosion, or radioactive radiation). For example, O-ring metal seals are applied in the closure lid system of transport and storage casks for radioactive materials to guarantee an approved specified leak-tightness and the safe enclosure of the radioactive inventory. Within safety assessments of those casks under normal or accident conditions during transport and long-term interim storage for several decades, numerical simulations of the thermo-mechanical behavior of metal seals by using finite element (FE) analyses are suitable and effective. In general, finite element codes provide the possibility to construct a complex three-dimensional (3D) modelling of metal seals with solid elements, cf., where all components of the metal seals are modeled in detail. This modelling is complex but allows the consideration of underlying physical effects such as elastic-plastic deformation, thermal expansion, creep/relaxation, friction and possible local damage. Therefore, this approach permits the investigation and understanding of the complex behavior of metal seals in detail which can hardly be measured for all seal components. In a prior work, the complex 3D modelling approach was applied to investigate the influence of each seal component on the global seal force by considering varying material properties and different seal diameters. In the present contribution, the influence of manufacturing tolerances is discussed. At first, the results of prior work are summarized. After that, the manufacturing tolerances of the studied O-ring metal seal types are described and the corresponding FE model with all individual components is introduced. Finally, the influence of varying manufacturing tolerances of each seal component on the global seal force is analyzed and discussed. T2 - The 2019 EMI International Conference CY - Lyon, France DA - 3. July 2019 KW - Finite element method KW - Metal seals KW - Material properties KW - Manufacturing tolerances PY - 2019 AN - OPUS4-48448 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -