International acclaim: doctoral candidate at the University of Siegen develops new method for detecting impact damage more quickly and more accurately.
It's hailing and a small crack develops in the windscreen; it first goes unnoticed and eventually turns into a problem. This type of scenario, which usually spells annoyance and expense in the case of a car, can become dangerous when it comes to aerospace: it happens when material damage occurs as a result of brief high loads, such as those produced by a collision with a bird.
The high performance fibre composite materials that are used are very sensitive to these kinds of impact loads. At the University of Siegen, Daniel Ginsberg has developed a new kind of monitoring system that registers an impact load more quickly and more accurately than other methods. Ginsberg uses fewer sensors than in previous methods, which makes load monitoring significantly less expensive and more attractive in terms of possible applications.
The doctoral candidate from the University of Siegen has already won international recognition for his paper entitled "Sparse Solution Strategy for Simultaneous Localization and Magnitude Estimation of Impact Loads". At this year's International Conference on Smart Materials and Structures in Vancouver, Canada, Ginsberg received the best student paper award.
The article that was submitted gives an account of the significant interim findings of Ginsberg's doctoral thesis, which he is writing as a member of the working group directed by Siegen Professor Claus-Peter Fritzen, who co-authored the paper.
Load monitoring systems measure vibrations of the material. The vibrations can be used to reconstruct the location and intensity of an impact. This makes it possible to predict and prevent damaging after-effects, which could even include material failure.
Ginsberg's monitoring system uses a new calculation method and has applied algorithms from mathematics to the problem of force reconstruction. His method is superior to previous ones in a number of respects.
"With other methods, the location of the impact has to be known for the force reconstruction," says Ginsberg. His calculations, by contrast, reveal the location of the impact, are more accurate and more reliable, and they require fewer sensors to achieve such results.
Björn Bowinkelmann | idw - Informationsdienst Wissenschaft
Physics, photosynthesis and solar cells
01.12.2016 | University of California - Riverside
New process produces hydrogen at much lower temperature
01.12.2016 | Waseda University
A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...
The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.
The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...
Broadband rotational spectroscopy unravels structural reshaping of isolated molecules in the gas phase to accommodate water
In two recent publications in the Journal of Chemical Physics and in the Journal of Physical Chemistry Letters, researchers around Melanie Schnell from the Max...
The efficiency of power electronic systems is not solely dependent on electrical efficiency but also on weight, for example, in mobile systems. When the weight of relevant components and devices in airplanes, for instance, is reduced, fuel savings can be achieved and correspondingly greenhouse gas emissions decreased. New materials and components based on gallium nitride (GaN) can help to reduce weight and increase the efficiency. With these new materials, power electronic switches can be operated at higher switching frequency, resulting in higher power density and lower material costs.
Researchers at the Fraunhofer Institute for Solar Energy Systems ISE together with partners have investigated how these materials can be used to make power...
16.11.2016 | Event News
01.11.2016 | Event News
14.10.2016 | Event News
02.12.2016 | Medical Engineering
02.12.2016 | Agricultural and Forestry Science
02.12.2016 | Physics and Astronomy