The use of composite materials in the aeronautic industry has been increasing since (in the 70s in the North American market and the 80s in Europe) they started to be used in commercial aviation as a substitute for classic materials such as metals. The reason for their use was largely because of their capacity to reinforce in preferential directions, their high rigidity, specific resistance and their enhanced fatigue and corrosion behaviour. Currently, the main reasons to justify their use in this sector are to do with reducing the structural weight of the aircraft, the reduction in the number of parts needed in its assembly (fewer zones for riveting) and, finally, the reduction of maintenance operations over the useful lifespan of the craft.
But there are certain limitations in their use such as the high costs of the raw material and of labour for the manufacture of large parts, the need for long periods of development, together with the complexity associated with its design, the difficulties in obtaining certifications for the necessary materials. On balance, between the advantages and disadvantages that these materials have, their current application in a commercial aircraft involves 20% of its weight. However, future tendencies point to an important increase in this percentage, enabling reductions in both weight and cost of aircraft, enhanced safety conditions and reduced environmental impact.
Considering that the average life of a plane is about 20 years and that parts made from composite materials are not repaired but replaced, the aeronautics sector is finding a huge quantity of waste material on its hands a solution for which has to be found. This is because the only currently available way to treat this type of materials is by dumping them in authorised dumps where they are still accepted. In fact, in the aeronautics market, future tendencies already point to the substitution of thermostable materials by other kinds of materials such as thermoplastics or GLARE®-type plastic/metal hybrid materials, although the reasons that justify this change are based more on economic (automation of the process, lowering labour costs, mass production, obtaining materials with enhanced mechanical properties, etc.) than on criteria of recyclability.
Scientists team up on study to save endangered African penguins
16.11.2017 | Florida Atlantic University
Climate change: Urban trees are growing faster worldwide
13.11.2017 | Technische Universität München
The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.
Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...
Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.
That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...
Computer Tomography (CT) is a standard procedure in hospitals, but so far, the technology has not been suitable for imaging extremely small objects. In PNAS, a team from the Technical University of Munich (TUM) describes a Nano-CT device that creates three-dimensional x-ray images at resolutions up to 100 nanometers. The first test application: Together with colleagues from the University of Kassel and Helmholtz-Zentrum Geesthacht the researchers analyzed the locomotory system of a velvet worm.
During a CT analysis, the object under investigation is x-rayed and a detector measures the respective amount of radiation absorbed from various angles....
The quantum world is fragile; error correction codes are needed to protect the information stored in a quantum object from the deteriorating effects of noise. Quantum physicists in Innsbruck have developed a protocol to pass quantum information between differently encoded building blocks of a future quantum computer, such as processors and memories. Scientists may use this protocol in the future to build a data bus for quantum computers. The researchers have published their work in the journal Nature Communications.
Future quantum computers will be able to solve problems where conventional computers fail today. We are still far away from any large-scale implementation,...
Pillared graphene would transfer heat better if the theoretical material had a few asymmetric junctions that caused wrinkles, according to Rice University...
15.11.2017 | Event News
15.11.2017 | Event News
30.10.2017 | Event News
17.11.2017 | Physics and Astronomy
17.11.2017 | Health and Medicine
17.11.2017 | Studies and Analyses