People are just as likely to be killed, or property damaged, by the shock wave from an exploding bomb as from flying debris or flames. The rush of gases emanating from a bomb can travel more than 10 times the speed of sound, destroying everything in its path.
Two University of Rhode Island engineers have constructed a "shock tube" to simulate this rush of gas so they can test the ability of various new composite materials to withstand these extreme forces.
"What were creating is a controlled explosive effect so we can test materials for their resistance to explosions," explained Carl-Ernst Rousseau, assistant professor of mechanical engineering. "When chemicals react and burst in a bomb, they create a pressure pulse in the air that expands. Thats what were creating in the shock tube."
A new manufacturing process for aluminum alloys
19.06.2019 | DOE/Pacific Northwest National Laboratory
Innovative powder revolutionises 3D metal printing
19.06.2019 | Technische Universität Graz
The quality of additively manufactured components depends not only on the manufacturing process, but also on the inline process control. The process control ensures a reliable coating process because it detects deviations from the target geometry immediately. At LASER World of PHOTONICS 2019, the Fraunhofer Institute for Laser Technology ILT will be demonstrating how well bi-directional sensor technology can already be used for Laser Material Deposition (LMD) in combination with commercial optics at booth A2.431.
Fraunhofer ILT has been developing optical sensor technology specifically for production measurement technology for around 10 years. In particular, its »bd-1«...
The well-known representation of chemical elements is just one example of how objects can be arranged and classified
The periodic table of elements that most chemistry books depict is only one special case. This tabular overview of the chemical elements, which goes back to...
Light can be used not only to measure materials’ properties, but also to change them. Especially interesting are those cases in which the function of a material can be modified, such as its ability to conduct electricity or to store information in its magnetic state. A team led by Andrea Cavalleri from the Max Planck Institute for the Structure and Dynamics of Matter in Hamburg used terahertz frequency light pulses to transform a non-ferroelectric material into a ferroelectric one.
Ferroelectricity is a state in which the constituent lattice “looks” in one specific direction, forming a macroscopic electrical polarisation. The ability to...
Researchers at TU Graz calculate the most accurate gravity field determination of the Earth using 1.16 billion satellite measurements. This yields valuable knowledge for climate research.
The Earth’s gravity fluctuates from place to place. Geodesists use this phenomenon to observe geodynamic and climatological processes. Using...
Discovery by Brazilian and US researchers could change the classification of two species, which appear more akin to jellyfish than was thought.
The tube anemone Isarachnanthus nocturnus is only 15 cm long but has the largest mitochondrial genome of any animal sequenced to date, with 80,923 base pairs....
29.04.2019 | Event News
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15.04.2019 | Event News
19.06.2019 | Physics and Astronomy
19.06.2019 | Information Technology
19.06.2019 | Materials Sciences