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Department of Natural Sciences

Portrait Johannes Steinhaus (DE)

Prof. Dr Johannes Steinhaus

Vice Dean/Professor in Materials Science - Hybrid Materials and Failure Analysis /Head of Industry Cooperations in TREE Institute

Unit

Department of Natural Sciences

Location

Rheinbach

Room

I 207

Address

von-Liebig-Str. 20

53359, Rheinbach

Telephone

+49 2241 865 458

Profile

Tasks

  • Professor for Material Sciences, esp. hybrid material systems and failure analysis
  • Institute of Technology, Resource Conservation and Energy Efficiency, Head of Industrial Services
  • Head of the Master's programme "Materials Science and Sustainability Methods

Research Interests

  • Microplastic analysis
  • Failure analysis
  • Simulation and durability analysis of rubber components
  • Real-time analysis of the curing behaviour of thermoset systems
  • Microscopy in the characterisation of plastics
  • Use of thermal analysis methods (DSC, DMA, TGA, TMA and DEA) in polymer development
  • Component testing and polymer analysis

Current courses

  • Additive Manufacturing
  • Biomedizinische Materialien

  • Conventional Processing Techniques
  • Forensische Schadenanalyse

  • Polymer Analytics
  • Recycling von Kunststoffen und Maritime Müllproblematik

  • Thermische Analyse von Kunststoffen

  • Werkstoffe, Strukturen, Methoden, Tools

  • Advanced Design, Methods and Tools

Seminars 
In cooperation with Prof. Dr. Bernhard Möginger:

  • Thermoplastics
  • Thermosetting plastics

(Cooperation with the German Society for Materials Science DGM) 

Curriculum vitae

„Johannes Steinhaus currently works at the Department of Natural Sciences, Bonn-Rhein-Sieg University of Applied Sciences. He is program coordinator of the master's course "Materials Science and Sustainability Methods". Furthermore, he does research in polymer testing and design as well as in failure analysis. He is currently working on polymer and microplastics analytics. Further research interests are in the field of polymer littering and polymer packaging design for recyclability.”

Johannes Steinhaus

Research Projects

real time curing and failure analysis of thermosets

The construction of high quality polymer products, bondings and composite materials requires: wide knowlegde about the materials used reliable quality control for incoming and outgoing products high process safety reliable suppliers Already for construction planing, proper materials have to be chosen. Not only the final price, but also the material properties such as the possible strain or influences by surrounding media have to be taken into account. In case the material fails during the fabrication, a lot of problems and costs may arrise. Material faliure may disturbe the whole construction process and even may influence subsequent orders, especially when productions runs 24/7 and "just in time". And this is where not only the source of failure, but also responsibilities has to be clarified. At this point, failure analysis can help to find which parameters led to the final material collapse. But which of the high variety of methods is the right one? How can I minimize the number of analyses and costs and get the fastest results? Aim of this Project is to teach strengths and weaknesses of the most important polymer analysis methods. The most common applications in terms of polymers, composite materials and adhesions are demonstrated with special respect for failure analysis and quality assurance.  This includes the following analysis methods: Microscopic methods (light, digital and SEM) thermic analysis methods (DSC, DMA and DEA) mechanical analysis (static and dynamic) special polymer analysis methods (pyrolysis GC-MS, SPME-GC-MS, RFA, FT-IR, XRD, etc.)

Project management at the H-BRS

Prof. Dr Johannes Steinhaus
Teaser Placeholder
RedPro -reducing prototypes for the production of blow mouldered parts

<p>Die Hochschule Bonn-Rhein-Sieg - einfach ausgezeichnet. Studieren Sie bei uns! Es erwartet Sie ein praxisorientiertes Studium auf der Basis aktueller Forschungsergebnisse.</p>

Project management at the H-BRS

Prof. Dr Johannes Geilen
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MatRes - material and resource efficiency for blow moulded parts

The aim of this project is to improve the efficiency for materials and resources of blow mouldering parts&nbsp;and packaging products below 3 liters. This shall be realised via optimisation of theoretical valuations like the FEM structure analysis. Integral properties can so be foreseen in the stage of development. Nevertheless, it is also necessary to improve the facturing hardware, so that the theoretically calculated thicknesses can be realised. Not only the development of new simulation methods, for example to simulate filling processes or the pinch-off weld, but also the material properties are in the main focus.&nbsp;The influnce of process parameters such as wall thickness degree of torsion and degree of orientation cooling rate are investigated and implemented into the simulation models

Project management at the H-BRS

Prof. Dr Johannes Geilen
Teaser Placeholder
Denthart

The aim of this project is to investigate the hardening process of light-curing&nbsp;dental filling components. This is realised by tracking the process in real time with the help of the dielectric analysis (DEA). This method enables to track the behaviour of resins while hardening in the electric alternating field. The DEA is method that is used frequently, mostly in the aerospace and automotive industry, but less in the dental fields. Due to its great resolution in time and its sensitivity the DEA can be used for fast initiation processes as well as for slow post-curing&nbsp;processes after light exposure.&nbsp; The goal is to learn more about the hardening processes and their different parameters, e.g. reaction temperature, resing compostition, viscosity, light intensity and depth of radiation. This data is crucial for kinetic modelling of polymerisation and hardening processes.

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