TY - CONF A1 - Trappe, Volker A1 - Kupsch, Andreas A1 - Müller, Ralf A1 - Hickmann, Stefan A1 - Müller, Alexander T1 - Dauerfestigkeitsgrenze in CFK charakterisiert mit der Röntgenrefraktionstopographie T2 - Fachausschusssitzung Materialcharakterisierung der DGZfP CY - Berlin DA - 2015-11-12 PY - 2015 AN - OPUS4-34914 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Trappe, Volker A1 - Lenke, Karoline A1 - Günzel, Stephan T1 - Ermittlung der Degradationsmechanismen in kurzfaserverstärktem Polyamid unter einachsiger Ermüdungsbelastung mittels ZfP T2 - IKV-Seminar Lebensdauerberechnung von Kunststoffbauteilen CY - Aachen, Deutschland DA - 2015-11-17 PY - 2015 AN - OPUS4-34915 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Trappe, Volker A1 - Nielow, Dustin A1 - Timme, Sebastian T1 - Faserkunststoffverbunde für moderne Leichtbauanwendungen auf dem Prüfstand T2 - Kolloquium der Chemiefreunde Erkner CY - Berlin, Deutschland DA - 2015-11-18 PY - 2015 AN - OPUS4-34916 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Trappe, Volker T1 - Betriebsfestigkeit von FKV-Werkstoffen - Effekte und Konzepte mit Proben-, Komponenten- und Stellvertreterversuchen T2 - 5. VDI Fachkonferenz Rotorblätter von Windenergieanlagen CY - Bremen, Deutschland DA - 2015-04-21 PY - 2015 AN - OPUS4-33068 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Dümichen, Erik A1 - Javdanitehran, M. A1 - Erdmann, Maren A1 - Trappe, Volker A1 - Sturm, Heinz A1 - Braun, Ulrike A1 - Ziegmann, G. T1 - Analyzing the network formation and curing kinetics of epoxy resins by in situ near-infrared measurements with variable heating rates N2 - Near-infrared spectroscopy (NIR) turned out to be well suited for analyzing the degree of cure for epoxy systems. In contrast to dynamic scanning calorimetry (DSC), where the released heat of reaction determines the degree of epoxy conversion indirectly, NIR spectroscopy is able to determine the conversion directly by analyzing structural changes. Therefore, a new heatable NIR cell was equipped with an integrated thermocouple, which enables the real sample temperature to be controlled and monitored in situ during epoxy curing. Dynamic scans at different heating rates were used for kinetic modelling, to define kinetic parameters and to predict real curing processes. The kinetic models and their parameters were validated with an isothermal and a more complex multi-step curing scenario. Two available commercial epoxy systems based on DGEBA were used with an anhydride and with an amine hardener. NIR results were compared with DSC data. The simulated conversion predicted with a model fitted on the basis of NIR and DSC dynamic scans showed good agreement with the conversion measured in the isothermal curing validation test. Due to the proven reliability of NIR in measuring the reaction progress of curing, it can be considered a versatile measurement system for in situ monitoring of component production in the automotive, aerospace and wind energy sectors. KW - Epoxy resins KW - Curing kinetics KW - Near-infrared spectroscopy KW - DSC PY - 2015 U6 - https://doi.org/10.1016/j.tca.2015.08.008 SN - 0040-6031 SN - 1872-762X VL - 616 SP - 49 EP - 60 PB - Elsevier CY - Amsterdam AN - OPUS4-34187 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Trappe, Volker A1 - Hickmann, Stefan T1 - Normung des Schubversuchs mittels Schubrahmen - Erkenntnisse zur Formulierung einer ISO-Norm T2 - NA 054 DIN-Normenausschuss Kunststoffe (FNK) CY - Berlin, Deutschland DA - 2015-12-01 PY - 2015 AN - OPUS4-35078 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Trappe, Volker T1 - Impulsvortrag LeBeWind - Rotorblätter T2 - 1. Beiratssitzung im Themenfeld Energie CY - Berlin, Deutschland DA - 2015-12-01 PY - 2015 AN - OPUS4-35079 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Trappe, Volker A1 - Kupsch, Andreas A1 - Müller, Bernd R. A1 - Hickmann, Stefan T1 - Dauerfestigkeitsgrenze von CFK charakterisiert mit Röntgenrefraktionstopographie in situ mechanischer Beanspruchung T2 - DGZfP / DACH Jahrestagung 2015 CY - Salzburg, Österreich DA - 2015-05-10 PY - 2015 AN - OPUS4-33184 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Trappe, Volker T1 - Betriebsfestigkeit von FKV-Werkstoffen - eine skalenübergreifende Betrachtung T2 - Forschungskolloquium "Plasma-Wind" CY - Göttingen, Deutschland DA - 2015-03-05 PY - 2015 AN - OPUS4-32717 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Lenke, Karoline A1 - Trappe, Volker T1 - Short fibre polymide under combined shear and tensile loading: a non-destructive evaluation of micro damage evolution N2 - The following paper focuses on the evolution of micro damage in short fibre reinforced polyamide. Therefore, tube samples are subjected to uni- and biaxial fatigue loadings. The evolution of micro damage is analysed by the non-destructive method of X-ray refraction analysis with consideration of the fibre orientation distribution. For validation of the applied micro damage models, fractographic analyses are performed. Concluding some general results, it has been observed that the load ratio influences the quantitative dominance of micro damage, whereas occuring damage phenomena depend on the type of loading (i.e. tension and torsion). Thus, zones in the Haigh-diagram are detected, where the occurence of damage mechanisms qualitatively and quantitatively changes. This is a basis for further research regarding anisotropic damage criteria. T2 - ICCM20 - 20th International conference on composite materials CY - Copenhagen, Denmark DA - 2015-07-19 KW - Short fibre composites KW - Fatigue KW - Damage evolution KW - Biaxial loading KW - Non-destructive testing PY - 2015 SN - 978-1629931999 SP - 1 EP - 10(?) AN - OPUS4-33799 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -