TY - CONF A1 - Orrin-Seemann, Daniel T1 - Strain-based failure criterion for on-site risk evaluation for pressure vessels T2 - FEMS Euromat 2015 (European Congress and Exhibition on Advanced Materials and Processes) CY - Warschau, Polen DA - 2015-09-20 PY - 2015 N1 - Geburtsname von Orrin-Seemann, Daniel: Seemann, D. - Birth name of Orrin-Seemann, Daniel: Seemann, D. AN - OPUS4-34394 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Orrin-Seemann, Daniel T1 - Strain-based failure criterion for on-site risk evaluation for pressure vessels T2 - Erste Sitzung der Arbeitsgruppe Simulation des DVM-Arbeitskreises "Bauteilsicherheit und Bruchmechanik" CY - Kassel DA - 2015-10-06 PY - 2015 N1 - Geburtsname von Orrin-Seemann, Daniel: Seemann, D. - Birth name of Orrin-Seemann, Daniel: Seemann, D. AN - OPUS4-34575 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Orrin-Seemann, Daniel A1 - Falkenberg, Rainer T1 - Dehnungsbasierte Methodik zur Festigkeitsbewertung von Druckbehältern unter Berücksichtigung von duktiler Schädigung N2 - Das Poster stellt ein Konzept zur Bewertung der strukturellen Integrität von havarierten Tankbehältern vor. Es wurde ein dehnungsbasiertes Konzept eingeführt, welches einen Brückenschlag zwischen duktiler Schädigung und dem Integritätszustand des Behälters herstellt. Diese Thematik entspringt aus einem Kooperationsvorhaben der Organisationseinheiten 5.2 und 3.2. T2 - 3. Workshop im Themenfeld Material CY - Konferenzsaal in Adlershof, Berlin, Germany DA - 12.10.2016 KW - Festigkeitsbewertung KW - Druckbehälter KW - Duktile Schädigung KW - Berstversuch KW - Simulation PY - 2016 AN - OPUS4-42339 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Orrin-Seemann, Daniel T1 - Application of a modified GTN-model to predict large deformation failure of pressure vessels N2 - The purpose of this research is to predict failure of a largely deformed pressure vessel. The employed Gurson-Tvergaard-Needleman (GTN) model enables a failure prediction through its in-built damage evolution law. A critical damage threshold defines the limit state of the evolution. Here, crack initiation is seen as the limit. Unfortunately, the GTN model does not capture void volume growth under shear stress and shows thermodynamic inconsistencies under pressure. To overcome these drawbacks and to make the model applicable to a wide range of complex stress states, a user-defined subroutine of the GTN model with an extension of its damage evolution law has been developed. The routine also accounts for large deformation which is advantageous for ductile vessel materials. The wall of a pressurised vessel is subjected to multi-axial stress states. Features, such as anges and valves, lead to even more complex stress states. The subroutine is used to determine the burst pressure and the location of failure. This research compares the results of the conventional and the modified GTN model with results of experimentally conducted burst tests. The conclusion of this research is that there is a clear improvement in failure prediction by using the modified GTN model. T2 - Fifth International Conference on Computational Modeling of Fracture and Failure of Materials and Structures CY - Nantes, France DA - 14.06.2017 KW - Multi KW - GTN model KW - Shear softening KW - Large deformation KW - Failure KW - Pressure vessel KW - Axial stress PY - 2017 AN - OPUS4-41117 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -