Bauerbach, Kai ; Vormwald, Michael ; Rudolph, Jürgen (2009)
Fatigue assessment of nuclear power plant component subjected to thermal cyclic loading.
Konferenzveröffentlichung, Bibliographie
Kurzbeschreibung (Abstract)
Thermal loading conditions of nuclear power plant components cause local stress-strain hystereses. For the fatigue life prediction of nuclear power plant components under thermal cyclic and structural loading a new method based on the local strain approach is to be presented. This method involves finite-element simulations as well as the experience gathered from lifetime assessment methods based on short crack models. The local stresses and strains are obtained from coupledfield FE-analyses. The calculation of the hysteresis-loops relies on appropriate material models and experimentally verified temperature-dependent material parameters in order to describe the elasto-plastic behavior of the material as realistically as necessary. Due to the temperature dependence of the material parameters the resulting hysteresis loops are of non-conventional shapes and similar to those observed under multiaxial nonproportional structural loading. Hence, fatigue methodologies developed for non-proportional loading conditions during the past years bear good prospects for successful application under non-isothermal loading conditions.
| Typ des Eintrags: | Konferenzveröffentlichung |
|---|---|
| Erschienen: | 2009 |
| Autor(en): | Bauerbach, Kai ; Vormwald, Michael ; Rudolph, Jürgen |
| Art des Eintrags: | Bibliographie |
| Titel: | Fatigue assessment of nuclear power plant component subjected to thermal cyclic loading |
| Sprache: | Englisch |
| Publikationsjahr: | 2009 |
| Ort: | Prag |
| Buchtitel: | Proceedings of PVP 2009, ASME Pressure Vessels and Piping Division Conference |
| Reihe: | ISBN 978-0-7918-3854-9 |
| Band einer Reihe: | als CD erschienen |
| Kurzbeschreibung (Abstract): | Thermal loading conditions of nuclear power plant components cause local stress-strain hystereses. For the fatigue life prediction of nuclear power plant components under thermal cyclic and structural loading a new method based on the local strain approach is to be presented. This method involves finite-element simulations as well as the experience gathered from lifetime assessment methods based on short crack models. The local stresses and strains are obtained from coupledfield FE-analyses. The calculation of the hysteresis-loops relies on appropriate material models and experimentally verified temperature-dependent material parameters in order to describe the elasto-plastic behavior of the material as realistically as necessary. Due to the temperature dependence of the material parameters the resulting hysteresis loops are of non-conventional shapes and similar to those observed under multiaxial nonproportional structural loading. Hence, fatigue methodologies developed for non-proportional loading conditions during the past years bear good prospects for successful application under non-isothermal loading conditions. |
| Fachbereich(e)/-gebiet(e): | 13 Fachbereich Bau- und Umweltingenieurwissenschaften > Institut für Stahlbau und Werkstoffmechanik > Fachgebiet Werkstoffmechanik 13 Fachbereich Bau- und Umweltingenieurwissenschaften > Institut für Stahlbau und Werkstoffmechanik 13 Fachbereich Bau- und Umweltingenieurwissenschaften |
| Hinterlegungsdatum: | 02 Feb 2015 08:33 |
| Letzte Änderung: | 02 Feb 2015 08:33 |
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