Russian scientists have found a way to predict the damage to the aircraft

© RIA Novosti / Sergey Mamontovaya in photobunny a sample of passenger aircraft MS-21 in the test shop of the Central Aerohydrodynamic Institute (TSAGI) in Moscow regionRussian scientists have found a way to predict the damage to the aircraft© RIA Novosti / Sergey Mamontovaya in Photobacterium to daily updates RIA Science

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Scientists of the National research technological University «MISIS» was first proposed contactless method of control of internal stresses in polymeric composites, which can be used to predict the appearance of defects, not just diagnose them. The method will help much easier and cheaper to assess the damage of composite structures: for example, parts of aircraft or ship hulls. The paper was published in «Journal of Alloys and Compounds».

Composites today are particularly common in the transport sector. In order to evaluate the quality and durability of the material is important to assess the internal stress of the entire structure, as at the stage of its manufacture and use. There are composites, where the internal stress after production reaches 95% of the tensile strength – that is, a little more voltage – and the material just crack.

In ugleplastika, fiberglass, hybrid composites, there is no such level of internal stresses after manufacture, but they still accumulate under the action of operating loads, operating environment, and weather factors. This leads to damage of the material and reduce its bearing capacity.

The authors note the possibility to use only one sensor, unlike the common methods of nondestructive testing, which requires equipment on both sides of the studied items. That is, this technology greatly simplifies, accelerates and reduces the cost of the assessment process of the composite, allowing not only to record, but also to predict the appearance of defects in a contactless manner.

At the moment, researchers have tested various modes of measurement and the method of implementation of the wires in the composite, making sure that the material properties do not deteriorate from this.

Methodology nust «MISIS» is already appreciated by several representatives of the aerospace and aviation industry, as well as developers of composite materials. According to Andrew Stepashkin, now the team will «leave the lab» and develop on the basis of laboratory instrument prototype sensor and measuring system.

«We’ve only done the first step but already we see the concrete application of our development,» – said the scientist. – It has additional features: implemented in the material grid of microwires can provide a «drain» the static charge in the construction of fiberglass. That is, our leads can replace the metal mesh that are inserted into these materials now.»