TY - CONF A1 - Marotzke, Christian A1 - Feldmann, Titus T1 - Failure of fiber reinforced composites under multiaxial stresses on microscale N2 - The failure of composites is initiated by imperfections on microscale. The interface between fiber and matrix is a key parameter concerning failure initiation. In order to get an improved understanding of local failure processes a fracture mechanical analysis of interfacial failure in a composite ply under transverse stresses is performed. The mixed mode energy release rate is calculated. In addition the failure of interfaces under cyclic loading is studied on a single fiber model. The quasistatic debonding process is compared with the interfacial failure under fatigue loading. It is shown that the tan delta can be used as an indicator for the damage propagation. T2 - ICMFF11 CY - Sevilla, Spain DA - 01. 06. 2016 KW - Composites KW - Failure KW - Energy release rate PY - 2016 AN - OPUS4-36746 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Becker, Ben T1 - Determination of consequences and accepted failure rates N2 - Evaluation of probability and consequence of critical failures of composite cylinders. T2 - Follow-up Workshop on Statistical Safety Assessment of Composite Cylinders CY - Berlin, Germany DA - 05.10.2016 KW - Failure KW - Composite KW - Pressure KW - Cylinder KW - Consequence KW - Rate PY - 2016 AN - OPUS4-37977 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Bäßler, Ralph T1 - Review: Corrosion Atlas Case Studies - 2019 Edition T2 - Materials and Corrosion N2 - This edition, published as first issue within the series “Corrosion Atlas”, provides 181 corrosion case studies, collected from 29 contributors. These Corrosion Atlas Case Studies provide a helpful tool required for engineers in their daily life to quickly determine and solve their equipment's corrosion problems by compact theoretical background and vivid examples. It fulfills the intension of the editors to be “the first centralized collection of case studies containing challenges paired directly with solutions together in one location”. KW - Corrosion KW - Failure KW - Water-bearing PY - 2020 DO - https://doi.org/10.1002/maco.202070054 SN - 1521-4176 SN - 0947-5117 VL - 71 IS - 5 SP - 859 PB - WILEY‐VCH Verlag GmbH & Co. KGaA CY - Weinheim AN - OPUS4-50757 LA - eng 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 -