With new, one-of-a-kind test equipment, National Institute of Standards and Technology (NIST) researchers aim to stamp out costly, delay-causing errors in the design of dies used to make sheet-metal parts ranging from car hoods to airplane wings to pots, pans and cans.
NIST post doctoral research fellow Mark Iadicola examines a sample of sheet metal that has been tested with NISTs new formability testing station.
Photo by Barry Gardner/NIST
The U.S. auto industry alone is estimated to spend more than $700 million a year on designing, testing, and correcting new dies for its latest models, each containing about 300 stamped parts shaped by dies and presses. About half of the total goes for remedying unanticipated errors--manifested as wrinkles, splits, excessive thinning or other defects.
By fitting NIST’s metal-stamping test station with an X-ray stress measurement system, the Institute’s materials scientists now can make detailed maps of stresses and strains as sheets of steel and other metals are punched, stretched or otherwise shaped to achieve the desired part geometry. According to project leader Tim Foecke, the system can measure stress and strain behavior in many different directions while the sheet is being stretched in two directions simultaneously, a condition most commonly seen in forming operations. Current methods extrapolate from strain measurements taken from tests that stretch the sheet in only one direction. As a consequence, newly designed dies often must undergo successive rounds of refinement to correct for these simplifications in computer models.
Mark Bello | EurekAlert!
Dresdner scientists print tomorrow’s world
08.02.2017 | Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS
New technology for mass-production of complex molded composite components
23.01.2017 | Evonik Industries AG
The Institute of Semiconductor Technology and the Institute of Physical and Theoretical Chemistry, both members of the Laboratory for Emerging Nanometrology (LENA), at Technische Universität Braunschweig are partners in a new European research project entitled ChipScope, which aims to develop a completely new and extremely small optical microscope capable of observing the interior of living cells in real time. A consortium of 7 partners from 5 countries will tackle this issue with very ambitious objectives during a four-year research program.
To demonstrate the usefulness of this new scientific tool, at the end of the project the developed chip-sized microscope will be used to observe in real-time...
Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
The results will be published on March 22 in the journal „Astronomy & Astrophysics“.
Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...
Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...
In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
20.03.2017 | Event News
14.03.2017 | Event News
07.03.2017 | Event News
28.03.2017 | Life Sciences
28.03.2017 | Information Technology
28.03.2017 | Physics and Astronomy