TY - CONF A1 - Duffner, Eric T1 - UN Service Life Test für UN-Flaschen N2 - Erläuterung des geänderten Verfahrens zur wiederkehrenden Prüfung von UN Druckgefäßen T2 - Abschlussveranstaltung P200 CY - BAM, Berlin, Germany DA - 08.04.2016 KW - UN Druckgefäße KW - wiederkehrende Prüfung KW - UN service life test PY - 2016 AN - OPUS4-37254 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Duffner, Eric T1 - Hydraulic load cycle test bench for extreme temerature tests N2 - Components, function and technical details of the hydraulic load cycle test bench for extreme temperature test. T2 - Hannover Industrie Fair CY - Hannover, Germany DA - 25.04.2016 KW - extreme temperature KW - life cycle test KW - cylinders PY - 2016 AN - OPUS4-37251 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Duffner, Eric T1 - Hydraulic slow burst test bench N2 - Components, function and technical details of the Hydraulic slow burst test bench T2 - Hannover Industrie Fair CY - Hannover, Germany DA - 25.04.2016 KW - cylinders KW - burst test KW - creep behaviour PY - 2016 AN - OPUS4-37252 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Duffner, Eric T1 - Überwachung der Fertigungsqualität von Faserverbund - Druckbehältern mittel Schallemissionsprüfung T2 - 18. Kolloquium Schallemission (DGZfP) CY - Wetzlar, Germany DA - 2011-10-26 PY - 2011 AN - OPUS4-24746 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Duffner, Eric T1 - Überwachung der Fertigungsqualität von Faserverbund-Druckbehälern mittels Schallemissionsprüfung T2 - Materialica 2012 CY - Munich, Germany DA - 2012-10-23 PY - 2012 AN - OPUS4-26892 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Heimann, Jan A1 - Yilmaz, Bengisu A1 - Charmi, Amir A1 - Duffner, Eric A1 - Schukar, Marcus A1 - Prager, Jens T1 - Structural Health Monitoring (SHM) for continuous monitoring of hydrogen pressure vessels N2 - While hydrogen is one of the most promising energy carriers, the safety of hydrogen storage technology remains one of the most important factors for technological and societal approval. While the engineering safety factors of the pressure vessels are kept high, the periodic inspection and the limited lifetime are making the application very costly considering manpower, time, money, and material waste. The development of an integrated structural health monitoring system can allow an easy transition from the current situation to cost-effective predictive maintenance. Hence, we propose to integrate three different SHM systems into hydrogen pressure vessels, namely guided wave ultrasonics, acoustic emission, and fibre optic sensing, to continuously monitor the condition and integrity. In this work, we evaluated the condition of a Type IV composite overwrapped pressure vessel using ultrasonic guided wave propagation. We mounted fifteen piezo-electric wafers on the composite cylinder by shaping three rings containing five sensors each. We acquired data from the sensor network following different boundary conditions with artificial damages on the selected locations. The data were evaluated with guided wave tomography techniques using ultrasonic features (amplitude, frequency, etc.) as well as artificial intelligence (AI). The results suggest that both traditional guided wave fusion techniques and AI-based characterization methods can detect artificial damages. In future work, it is planned to integrate acoustic emission and fibre optic sensing. Moreover, the measurement and the test results will be implemented into a digital twin to derive trends and make predictions on the damage propagation as well as the remaining useful lifetime. This work has received funding from German Ministry of Economic Affairs and Climate Actions within the QI-Digital initiative (www.qi-digital.de). T2 - SCHALL 23 CY - Wetzlar, Germany DA - 21.03.2023 KW - Structural Health Monitoring KW - Ultrasonic Guided Waves KW - Composite Overwrapped Pressure Vessel KW - Hydrogen PY - 2023 AN - OPUS4-58026 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - RPRT A1 - Becker, Ben A1 - Mair, Georg W. A1 - Schoppa, Andre A1 - Duffner, Eric A1 - Szczepaniak, Mariusz A1 - Klauke, Andre A1 - Lenz, Stefan A1 - Lehr, Christian A1 - Hoffmann, Martin A1 - Gregor, Christian ED - Mair, Georg W. T1 - CryoCode: Kryodruck Tanksystem und Betankung – Validierung bis zum Normierungsvorschlag N2 - Entwicklung und Validierung eines Kryodruck-Tanksystems für Wasserstoff-Fahrzeuge. Darstellung der Versuchsergebnisse und des Normierungsvorschlags. KW - Kryodruck KW - Wasserstoff KW - Druckbehälter KW - Composite KW - Normierungsvorschlag PY - 2017 SP - 1 EP - 56 AN - OPUS4-40714 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Mair, Georg W. A1 - Becker, Ben A1 - Duffner, Eric A1 - John, Sebastian T1 - Composite storage systems for CGH2- systematic improvement of RC&S N2 - Conventional approval requirements exclusively ask for minimum strength values, which have to be met. The probabilistic approach estimates how likely none of the comparatively manufactured units fails during operation. Both questions are juxtaposed and compared here with respect to the load cycle tests. The influence of the sample sizes is discussed additionally. T2 - 10th INTERNATIONAL CONFERENCE ON SUSTAINABLE ENERGY & ENVIRONMENTAL PROTECTION CY - Bled, Slovenia DA - 27.06.2017 KW - Probabilistic KW - Hydrogen KW - Composite KW - Cylinder KW - Regulations KW - Load cycles KW - GTR 13 PY - 2017 AN - OPUS4-41677 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Mair, Georg W. A1 - Duffner, Eric A1 - Lau, Markus A1 - Szczepaniak, Mariusz T1 - Verbesserung der Reproduzierbarkeit von hydraulischen Lastwechselprüfungen an Composite-Druckbehältern - Teil 1 N2 - Die Sicherheit von Druckgefäßen und Treibgasspeichern gegen Ermüdungsversagen wird derzeit immer unter Einbeziehung von Lastwechselversuchen abgeprüft. Hierbei gibt es verschiedene Versuchsparameter, die nicht vorgegeben, sondern meist nur in eine Richtung limitiert sind. Einer dieser Parameter ist die Versuchstemperatur, die insbesondere bei Com - posite-Druckbehältern mit metallischem Liner eine große Rolle spielt. Der Einfluss dieses Aspekts wie auch der der Druckregelgenauigkeit und der Sauberkeit der Druckkurve auf Versuchsergebnisse werden an Beispielen analysiert. Daran schließt sich die Zusammenstellung der Ergebnisse eines Ringversuchs an hydraulischen Lastwechselanlagen an, an dem Anlagen für Innendruckversuche an 700-bar-Wasserstoffspeichern in vier europäischen Ländern beteiligt waren. KW - Ringversuch KW - Betriebssicherheit KW - Lastwechselversuche KW - Reproduzierbarkeit KW - Temperatur KW - Druckextrema KW - Kühlstrecke KW - Medienkühlung PY - 2009 SN - 1434-9728 SN - 1436-4948 SN - 0372-2457 SN - 0376-1185 VL - 50 IS - 11/12 SP - 33 EP - 39 PB - Springer-VDI-Verl. CY - Düsseldorf AN - OPUS4-20456 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Duffner, Eric T1 - TAHYA Kick-Off Meeting N2 - Presenting BAM and the focus and role within the project. T2 - TAHYA Kick-Off Meeting CY - Hasselt, Belgium DA - 18.01.2018 KW - TAHYA Project PY - 2018 AN - OPUS4-43922 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Mair, Georg W. A1 - Becker, Ben A1 - John, Sebastian A1 - Duffner, Eric T1 - Composite storage systems for compressed hydrogen - systematic improvement of regulations for more attractive storage units N2 - Hydrogen is an attractive energy carrier that requires high effort for safe storage. For ensuring safety, they must undergo a challenging approval process. Relevant standards and regulations for composite cylinders used for the transport of hydrogen and for its onboard storage are currently based on deterministic (e.g. ISO 11119-3) or semi-probabilistic (UN GTR No. 13) criteria. This paper analysis the properties of such methods with respect to the evaluation of load cycle strength. Their characteristics are compared with the probabilistic approach of the BAM. Based on Monte-Carlo simulations, the available design range (mean value and scatter of strength criteria) of current concepts was exemplarily estimated. The aspect of small sample sizes is analysed and discussed with respect to the evaluation procedures. KW - Probabilistic KW - Monte-Carlo KW - Regulations KW - Composite cylinder KW - Hydrogen vehicles KW - Transport of dangerous goods PY - 2018 DO - https://doi.org/10.1016/j.ijhydene.2018.04.068 SN - 0360-3199 VL - 45 IS - 25 SP - 13672 EP - 13679 PB - Elsevier Ltd AN - OPUS4-46856 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -