Carbon fiber-reinforced plastics, characterized by their light weight, high strength, and ability to create complex shapes, have become widely used in the Russian aviation industry. However, various defects can occur during the creation of parts from such material, including layer crushing, edge delamination, and cracking. Scientists from Perm National Research Polytechnic University (PNRPU) have studied how the size, shape, and location of defects affect the mechanical properties of a part and developed a method for predicting the consequences of such defects. The research will allow for the creation of more load-resistant parts for airplanes, rockets, UAVs, and prevent their destruction, according to the university's press service.
The scientists proposed recording the process of carbon fiber delamination using a new method - with the use of an acoustic emission system.
During testing, we determined the maximum stresses and modulus of elasticity. Meanwhile, signals were continuously recorded in the acoustic emission system.
The samples used in the tests were destroyed by delamination and lost stability. It turned out that this depends more on the type of defect. For example, a defect in the shape of a circle leads to loss of stability earlier than a defect in the shape of a rectangle.
After analyzing the test results, the scientists obtained a graph of the material's deflection depending on the load. The study proved that the loss of stability of the composite material occurs even before reaching the compressive strength limit. The destruction of even one layer of fiber affects the part.
Read more on the topic:
Precise grip: PNRPU scientists have made their bionic hand prostheses more accurate
PNRPU has improved the method of layer-by-layer production of steel parts
Now on home
The service contains data on 45,000 fraudulent sites
The state has accelerated the introduction of unmanned solutions, integrating them into the real sector of the economy
Modernized engines may equip the Lada Azimut crossover
The price is 132 billion 265.8 million rubles
The manufacturer plans to strengthen its lineup of light commercial vehicles
The production of carbon fiber was organized in the shortest possible time
Electric vans will speed up the repair of urban transport infrastructure
Countries are working to synchronize regulations in the field of AI
The service's average daily audience is 55 million people
Stable Isomaterial Based on Metakaolin Has a Density Below 300 kg/m³
Re-identification quality improved twofold with new DynaMix method
Russians will be able to find out about debts online