The abbreviation “Reltest” stands for Reliability & Testing and eponymous represents our core competencies, which lie in the areas of reliability technology and testing. In times of increasing customer requirements and at the same time ever more complex mechatronic solutions, we provide the necessary know-how to ensure reliability and service life.
RelTest-Solutions
We at RelTest-Solutions are three mechanical engineers and during our time as academic employees in the field of reliability technology at the Institute for Machine Elements at the University of Stuttgart, we recognized the increasing need for efficient and intelligent protection solutions. Well-known customers at national and international level have been benefiting from our know-how since 2016.
Dr.-Ing. Martin Dazer
Founder & Consultant
Head of Reliability Technology at IMA
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Doctorate in the field of fatigue strength and reliability test planning
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Master’s degree in mechanical engineering at the University of Stuttgart
Alexander Kremer
Founder & Consultant
PhD student in reliability engineering at IMA
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Doctorate: Statistical test planning in service life testing with confidence levels
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Master’s degree in mechanical engineering at the University of Stuttgart
Kevin Lucan
Founder & Consultant
PhD student and deputy Head of Reliability Technology at IMA
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Doctorate: Methodology for the determination of representative load collectives
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Degree in mechanical engineering
Our publications
Dazer, M.; Grundler, A.; Herzig, T.; Berschte, B. : R-OPTIMA – Optimal planning of reliability tests: Proc of the 7th International Conference Integrity-Reliability-Failure, 2020, S. 695-702.
Herzig, T.; Dazer, M.; Grundler, A.; Berschte, B. : Integrating accelerated life tests into optimal test planning: Proc of the 7th International Conference Integrity-Reliability-Failure, 2020, S. 665-672.
Grundler, A.; Dazer, M.; Herzig, T.; Berschte, B. : Considering multiple failure mechanisms in optimal test design: Proc of the 7th International Conference Integrity-Reliability-Failure, 2020, S. 673-682.
Diesch, M. ; Dazer, M. ;Lucan, K., Bubolz, T. ; Berschte, B. : Soft Sensor Application to predict remaining useful Life of Components of the Exhaust System of Diesel Engines : RAMS 2020 Conference (Annual Reliability and Maintainablity Symposium), 27.01.-30.01.2020, Palm Springs,CA, USA.
Gretzinger, M. Dazer, and B. Bertsche: Using Life Data of Competing Failure Modes to Increase the Remaining Useful Life of Gear Wheels, in RAMS 2020 Conference, Palm Springs, CA, USA, 2020.
Grundler, M. Dazer, and B. Bertsche, Reliability-Test Planning Considering Multiple Failure Mechnaisms and System Levels – An Approach for Identifying the Optimal System-Test Level, Type, and Configuration with Regard to Individual Cost and Time Constraints in Annual Reliability and Maintainability Symposium, RAMS 2020, 2020.
Kremer, A. ; Bertsche, B.:A Methodology for Consideration of Uncertainty in Lifetime Design of Experiments, Proc. RAMS 2019 Conference (Annual Reliability and Maintainablity Symposium), 28.01.-31.01.2019, Orlando, FL, USA.
Lucan, K. ; Dazer, M. ; Hintz, K. ; Bertsche, B.: Effect of Competing Failure Modes on the System Reliability Estimation: Proc. RAMS 2019 Conference (Annual Reliability and Maintainablity Symposium), 28.01.-31.01.2019, Orlando, FL, USA. ISBN 978-1-5386-6554-1/19.
Herzig, T. ; Grundler, A. ; Dazer, M. ; Bertsche, B.: Cost- and Time-effective Planning of Accelerated Reliability Demonstration Tests – A new Approach of comparing the Expenditure of Success Run and End-of-Life Tests: Proc. RAMS 2019 Conference (Annual Reliability and Maintainablity Symposium), 28.01.-31.01.2019, Orlando, FL, USA.
Lucan, K. ; Bersche, B. :Standard-Lastkollektive für die Nutzfahrzeugbremse ; Automobil-technische Zeitschrift, Springer Vieweg Jahrgang 121, 05/2019, S. 78-83.
Lucan, K. ; Bertsche, B. : Standard Load Spectra for Commercial Vehicle Brakes. EuroBrake 2019 21.5-23.5 2019, Dresden.
Henß, M. ; Kemmler, S. ;Kremer, A. ;Bertsche, B. :Regression with individual weigths to prevent overfitting. Forschung im Ingenieurwesen, Springer: Berlin, Heidelberg, 2019, DOI: 1007/s10010-019-00301-4.
Herzig, T. ; Dazer, M. ; Bertsche, B. : Zuverlässigkeitsabsicherung ressourcenschonender Produkte durch effiziente Erprobungsplanung. Stuttgarter Symposium für Produktentwicklung 2019 (SSP2019), Stuttgart, 2019.
Schleinkofer, U. ; Dazer, M. ; Lucan, K. ;Mannuß, O. ; Bertsche, B. ; Bauernhansl, T. :Framework for Robust Design and Reliability Methods to Develop Frugal Manufacturing Systems. CIRP Manufacturing Systems Conference 2019, Ljubljana, Slowenien, 2019.
Kremer, A. ; Bertsche, B. : A New Approach for Parametrizing Multidimensional Lifetime Models, Proc. ESREL 2019 Conference, 22.06-26.09.2019, Hannover, Deutschland, ISBN 978-981-11-2724-3, pp. 723-730.
Kremer, A; Bertsche, B.; Scholzen, A.: The influence of environmental and manufacturing conditions on lifetime and reliability predictions for industrial timing belt drives. Forschung im Ingenieurwesen, Springer: Berlin, Heidelberg, 2019, DOI: 10.1007/s10010-019-00381-2.
Kremer, A.; Bertsche, B.; Scholzen, A.: Verbesserte Auslegung industrieller Zahnriemenantriebe durch Analyse von Breitenfaktoren und der Alterung. Dresdner Maschinenelemente Kolloquium 2019, 26.-27.11.2019, Dresden, sierke Verlag, ISBN 978-3-96548-055-1.
Gretzinger, M. Dazer, and B. Bertsche,Lebensdauerpotentiale bei der Schadensart Zahnradgrübchen, in Dresdner Maschinenelemente Kolloquium, Dresden, 2019, pp. 209–218.
Kremer, A.; Bertsche, B.:Experimentelle Untersuchungen von Breitenfaktoren und der Alterung zur Verbesserung der Auslegung von industriellen Zahnriemengetrieben. VDI-Fachkonferenz: Umschlingungsgetriebe 2019. 11.-12. Dezember 2019, Stuttgart.
Diesch, M.; Bubolz, T.; Dazer, M.; Lucan, K.; Bertsche, B.: Application of virtual sensors for stress-related design and operation-specific lifetime prognosis. HEAVY-DUTY-, ON- UND OFF-HIGHWAY-MOTOREN 2019 14. Internationale MTZ-Fachtagung Großmotoren.
Dazer, M.; Bräutigam, D.; Leopold, T.; Bertsche, B.: Optimal planning of reliability life tests considering prior knowledge. Proc. RAMS 2018, 22.01 – 25.01.2018, Reno, USA.
Lucan, K; Dazer, M.; Waller, J.; Bertsche, B.: Analysis of the Weibull Estimation for Competing Failure Modes. Proc. RAMS 2018, 22.01 – 25.01.2018, Reno, USA.
Kremer, A.; Bertsche, B.:Versuchsbasierte Lebensdauerprognose von Zahnriemengetrieben. DVM Workshop ZuMAS (Zuverlässigkeit mechatronischer und adaptronischer Systeme), 27.-28. Februar 2018, BMW Group Forschungs- und Innovationszentrum FIZ, München.
Müller, K., Dazer, M., Cheng Wen, P., Bertsche, B.:Fatigue Reliability Assessment For Floating Wind Turbines. In: Proceedings of Wind Europe Conference 2018, 25.-28.09.2018, Hamburg, Germany.
Kremer, A.; Bertsche, B.; Scholzen, A.: Ermittlung von lebensdauerbeeinflussenden Faktoren bei Zahnriemengetrieben. Antriebstechnik, Vereinigte Fachverlage GmbH, Jahrgang 74, 11/2018, S.148-153.
Kremer, A.; Bertsche, B.; Scholzen A.: Methodik zur Prognose der Lebensdauer von Zahnriemengetrieben. Schweizer Maschinenelemente Kolloquium SMK 2018. 27.-28. November 2018, Rapperswil, Schweiz; KISSsoft AG (Hrsg.); TUDpress, 2018 – ISBN 978-3-95908-150-4.
Dazer, M. Henß, and B. Bertsche, Zuverlässigkeit und Betriebsfestigkeit, in Handbuch Konstruktion, 2nd ed., F. Rieg and R. Steinhilper, Eds. Hanser Verlag, 2018.
Kremer, A.; Bertsche, B.: BeschleunigteZuverlässigkeitstests unter Berücksichtigung von Vertrauensbereichen. Forschung im Ingenieurwesen, Volume 82, Issue 468, Springer: Berlin, Heidelberg, 2018, S. 1-15, DOI: 10.1007/s10010-018-0290-0.
Stohrer, M., Lucan, K., Bertsche, B. :Planung eines Zuverlässigkeits-DoE im Spannungsfeld zwischen Test-Design und Erfolgswahrscheinlichkeit. 28. VDI-Fachtagung Technische Zuverlässigkeit 2017, 17.-18.05.2017, Leonberg, VDI-Berichte 2307, ISBN 978-3-18-092307-9. S. 269-280.
Müller, M. Dazer, and C. Po Wen, Damage Assessment of Floating Offshore Wind Turbines Using Response Surface Modeling, Energy Procedia, vol. 137, pp. 119–133, 2017.
Lucan, K. ; Henß, M. ; Bertsche, B. : Working Group CV-Brakes – Procedure for a Commercial Vehicle Brakes’ Standard. EuroBrake 2017 2.5-4.5 2017, Dresden.
Kemmler, S. ; Dazer, M. ; Leopold, T. ; Bertsche, B. : Lebensdaueranalyse auf Basis von multidimensionaler Zuverlässigkeits- und Robust Design Simualation. VDI-Fachtagung Technische Zuverlässigkeit 2017, 17.-18.05.2017, Leonberg, VDI-Berichte 2307, ISBN 978-3-18-092307-9.
Dazer, P. Höller, T. Leopold, and B. Bertsche, Stochastic fatigue calculations using an accelerated 3-step multilinear kinematic hardening model of spheroidal graphite iron, in Proceedings of the 7th International Conference on Mechanics and Materials in Design, Albufeira, Portugal, 2017, pp. 217–228.
Dazer, M.; Stohrer, M.; Kemmler, S.; Bertsche, B.:Planning of reliability life tests within the accuracy, time and cost triangle, Accelerated Stress Testing and Reliability (ASTR) Conference, 28.09 – 30.10.2016, Pensacola Beach, Florida, USA.
Dazer, M. ; Leopold, T. ;Bertsche, B. :Optimale Lebensdauertestplanung durch Berücksichtigung von Vorkenntnissen aus stochastischen Betriebsfestigkeitssimulationen, SIMVEC 2016, 22.11-23.11.2016, Baden-Baden.
Dazer, S. Kemmler, T. Leopold, J. Fricke, and B. Bertsche, Stochastic simulation approach for realistic lifetime forecast and assurance of commercial vehicle braking systems, in 12th Optimization and Stochastic Days 2015, Weimarhalle, Weimar, Germany, 2015.