As a new manufacturing method, 3D printing technology has been widely used in the field of aerospace in recent years. However, the brittleness of 3D printing filament has been one of the bottlenecks restricting its further application. Therefore, it is of great practical significance and scientific value to test the brittleness of 3D filament and further study its application in aerospace field.

First, the brittleness test method of 3D printing filament

Brittleness testing is a method of assessing how easily a material will break when subjected to external forces. For 3D printing filament, the commonly used brittleness test methods include bending test, tensile test and impact test.

Bending test: The brittleness of the filament is assessed by bending the filament to a certain extent to see if it breaks. The method is simple and suitable for preliminary screening of materials.

Tensile test: By stretching the filament to break, record the stress-strain curve in the tensile process, so as to obtain the strength, elongation and other key performance indicators of the filament. This method can comprehensively evaluate the mechanical properties of filament rods, and is the most commonly used method in brittleness testing.

Impact testing: The impact resistance of the filament is assessed by subjecting the filament to an impact load and observing whether it breaks. This method can simulate the impact that the filament rod may encounter in actual use, and has high practical application value.

Second, the application of 3D printing filament brittleness test in the field of aerospace

In the field of aerospace, 3D printing technology is widely used in the manufacture of various complex structure parts, such as engine blades, aviation structural parts and so on. However, these parts need to withstand complex loads such as high temperature, high pressure and high speed in extreme environments, which puts extremely high requirements on the performance of materials. By conducting brittleness tests on the 3D printed filament, its reliability under these extreme conditions can be effectively assessed, thus ensuring the safe operation of the aircraft.

Optimize material formulation: Brittleness test results can provide material scientists with important data to help them optimize the formulation of 3D printed filament, improve the toughness of the material and reduce brittleness. For example, by adjusting the composition and proportion of the polymer matrix, the mechanical properties of the filament can be improved, making it more suitable for the aerospace field.

Improve the printing process: The brittleness test results can also provide engineers with feedback to help them optimize 3D printing process parameters such as print temperature, print speed, etc., to improve the performance of the filament. By adjusting these parameters, the internal defects of the filament can be reduced and its overall performance can be improved.

Design optimization: Brittleness test results can also provide guidance to designers to help them optimize the structural design of parts and improve their resistance to brittleness. For example, by increasing the wall thickness of a component and optimizing its shape and size, the risk of brittleness can be effectively reduced.

Iii. Case analysis

An aerospace company has used 3D printing technology to make a new type of engine blade. During the development process, engineers conducted brittleness tests on a variety of 3D printed filaments, and finally selected a filament with good toughness and low brittleness. By optimizing the printing process and structural design, the engine blades that meet the performance requirements are successfully manufactured, and show good reliability in practical use.

Iv. Future Outlook

With the continuous development and improvement of 3D printing technology, the application prospect of 3D printing filament in the field of aerospace will be broader. In the future, by further studying the brittleness test method of 3d printer filament and its performance under extreme conditions, the material formulation and printing process can be continuously optimized to improve the performance and reliability of parts. At the same time, with the application of new technologies such as artificial intelligence and big data, brittleness test methods will be more intelligent and accurate, providing more powerful support for the application of 3D printing technology in the aerospace field.

In short, the brittleness test of 3D printed filament has important application value in the field of aerospace. By continuously optimizing the material formulation, improving the printing process and optimizing the design, the performance and reliability of the parts can be effectively improved, and the development of the aerospace industry can be contributed.