TY - CONF A1 - Duffner, Eric T1 - Introduction to hydraulic cycle testing T2 - 2nd WORKSHOP on STATISTICAL SAFETY ASSESSMENT of Composite Cylinders from Mass Production CY - BAM, Berlin DA - 2015-01-13 PY - 2015 AN - OPUS4-32448 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Duffner, Eric T1 - Technical Annex Load Cycle Test (LCT) of the Concept Additional Test (CAT) T2 - WORKSHOP on STATISTICAL SAFETY ASSESSMENT of Composite Cylinders from Mass Production CY - BAM Berlin DA - 2014-11-17 PY - 2014 AN - OPUS4-32297 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Duffner, Eric A1 - Schoppa, André A1 - Szczepaniak, Mariusz T1 - Untersuchung der Haltbarkeit von Reparaturmaßnahmen an Bremsleitungsabschnitten durch hydraulische Berstdruckprüfungen N2 - Im Rahmen einer Bachelorarbeit zum Thema „Untersuchungen an Bremsleitungsabschnittsreparaturen“ zwischen der HTW Berlin und der TÜV Rheinland Kraftfahrt GmbH wurden in Zusammenarbeit mit der Bundesanstalt für Materialforschung und -prüfung (BAM) Berstdruckprüfungen durchgeführt. Im Rahmen der Kooperation sollte untersucht werden, inwiefern Reparaturmaßnahmen an beschädigten Bremsleitungsabschnitten sicherheitstechnisch unbedenklich sind, auch in Bezug auf die Verwendung unterschiedlicher auf dem Markt erhältlicher Bremsleitungsmaterialien. KW - Bremsleitung KW - Berstprüfung PY - 2017 SN - 2191-007 VL - 7 IS - 6 SP - 44 PB - Springer VDI-Verlag CY - Düsseldorf AN - OPUS4-40490 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - 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 -