Researchers from the National University of Science and Technology (NUST) Center of Composite Materials has developed soft magnetic circuits that eventually provide a non-contact method of measuring the internally formed stress of composite materials used in aerospace and aircraft engineering.
The team’s study describes about the amorphous soft magnetic circuits measuring 10-60 microns in diameter arranged in a wired mechanism with the layers of carbon fiber in materials during the manufacturing stage to form a grid of stress-sensitive points.
Alevtina Chernikova, NUST scientist explained that “It is now possible to more effectively calculate the impact of internal damages during the operation of aircraft parts, oil pipelines, ship hulls, and other industrial and transport facilities”. The materials under stress respond differently to external magnetic fields that enable the soft circuits to detect stresses across the entirety of the material. These circuits are connected to a sensor called sticker, which is embedded into the material during the manufacturing stage and can send information to scientists which only employs a single sticker, making the process a much simpler and accelerated.
He also mentioned that Internal stresses in composite materials can arise and accumulate following defect manufacturing due to operating loads and the external environment that are difficult to measure. But, traditional non-contact methods, such as the use of ultrasonic waves, enforces researchers to detect defects which have already occurred, but eventually, they do not provide information on the distribution of stresses.
Andrey Stepashkin, Senior Research associate of composite materials has mentioned a statement that “We moved towards a success in the first step of a long journey where we already targeted practical application of our development” by determining the advanced design that can provide an additional drain of the static charge that occurs in fiber-glass structures where wires are quite capable of replacing metal grids which will be assorted into these materials.”