Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Detecting residual stresses on freight train wheels

11.09.2014

From 23 to 26 September 2014, Fraunhofer IZFP engineers present a new and enhanced generation of test equipment for rapid and reliable determination of residual stresses in rims at InnoTrans in Berlin, (hall 23B, booth 206).

In the case of a car, the braking operation is carried out in seconds – jamming on the brakes and shortly afterwards the vehicle has stopped. But with a fully loaded freight train weighing lots of tons braking takes much longer – on long descents braking, which is required to prevent the train’s unwanted acceleration, can even take more than 30 minutes.


Determination of residual stresses in freight train wheels

Uwe Bellhäuser

For the wheels and brakes this long braking time means hard work – such a strong mechanical loading and heating of the wheels may cause so-called tensile residual stresses, which can lead to cracks in the wheel tread and – worst case – to wheel breakage.

Geislinger Steige and Tauernbahn are best examples for routes that cause heavy endurance stress in wheels. Their strong inclinations and partly narrow radii require the permanent use of the wagons´ block brakes which generate the braking force by pressing the brake shoes against the tread of the wheels.

The scientists and engineers of the Fraunhofer Institute for Nondestructive Testing IZFP performed an elaborate redesign of the hard- and software of the so-called UER systems* by evaluating the experience gained with previous versions of the systems. Thus, they succeeded in adapting the new versions even better to the specific needs of the maintenance and wheel manufacturers plants.

While maintaining ease of use a variety of options for customer-specific documentation and report generation have been added. In particular, for the testing of newly manufactured wheels an optional software evaluation module is now available.

All UER systems, the new ones as well as all previously delivered systems, are integrated into the remote maintenance network of Fraunhofer IZFP, i.e. in case of a failure the service team is able to perform an extensive error analysis by remote access via Internet.

The inspection instruments are applied in the manufacturing process of new wheels, but especially in the maintenance of the freight train wheels.

Weitere Informationen:

http://www.izfp.fraunhofer.de

Sabine Poitevin-Burbes | idw - Informationsdienst Wissenschaft

Further reports about: Testing acceleration brakes cracks heating mechanical specific stresses

More articles from Trade Fair News:

nachricht New Process Technology Unlocks Boost in Laser Productivity
18.05.2017 | Fraunhofer-Institut für Lasertechnik ILT

nachricht OLED microdisplays as high-precision optical fingerprint sensors
09.05.2017 | Fraunhofer-Institut für Organische Elektronik, Elektronenstrahl- und Plasmatechnik FEP

All articles from Trade Fair News >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Wafer-thin Magnetic Materials Developed for Future Quantum Technologies

Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.

Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...

Im Focus: World's thinnest hologram paves path to new 3-D world

Nano-hologram paves way for integration of 3-D holography into everyday electronics

An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...

Im Focus: Using graphene to create quantum bits

In the race to produce a quantum computer, a number of projects are seeking a way to create quantum bits -- or qubits -- that are stable, meaning they are not much affected by changes in their environment. This normally needs highly nonlinear non-dissipative elements capable of functioning at very low temperatures.

In pursuit of this goal, researchers at EPFL's Laboratory of Photonics and Quantum Measurements LPQM (STI/SB), have investigated a nonlinear graphene-based...

Im Focus: Bacteria harness the lotus effect to protect themselves

Biofilms: Researchers find the causes of water-repelling properties

Dental plaque and the viscous brown slime in drainpipes are two familiar examples of bacterial biofilms. Removing such bacterial depositions from surfaces is...

Im Focus: Hydrogen Bonds Directly Detected for the First Time

For the first time, scientists have succeeded in studying the strength of hydrogen bonds in a single molecule using an atomic force microscope. Researchers from the University of Basel’s Swiss Nanoscience Institute network have reported the results in the journal Science Advances.

Hydrogen is the most common element in the universe and is an integral part of almost all organic compounds. Molecules and sections of macromolecules are...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Dortmund MST Conference presents Individualized Healthcare Solutions with micro and nanotechnology

22.05.2017 | Event News

Innovation 4.0: Shaping a humane fourth industrial revolution

17.05.2017 | Event News

Media accreditation opens for historic year at European Health Forum Gastein

16.05.2017 | Event News

 
Latest News

New approach to revolutionize the production of molecular hydrogen

22.05.2017 | Materials Sciences

Scientists enlist engineered protein to battle the MERS virus

22.05.2017 | Life Sciences

Experts explain origins of topographic relief on Earth, Mars and Titan

22.05.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>