How to test the brittleness of filament rod
Brittleness test is an important method to evaluate the resistance of materials to fracture under specific conditions. For filament, brittleness testing can reveal its performance under extreme conditions, thus ensuring its reliability and safety in a variety of application environments. This paper will introduce in detail how to test filament brittleness, including test methods, standards, applications and precautions.

Test method

The brittleness test of filament usually involves the following methods:
Low temperature brittleness test: This test is used to evaluate the brittleness of the filament at low temperatures. By exposing the filament to a gradually decreasing temperature and applying a load, the brittle fracture is observed. Common test standards include GB/T 1682-2014 and GB/T 15256-2014.

Impact brittleness test: This method evaluates the brittleness of the filament by applying a momentary impact load. During the test, the filament is subjected to high-speed impact and its impact resistance is measured. ASTM D3332-1999 provides a method for mechanical impact brittleness testing using an impact machine.

Bending brittleness test: Bending test can simulate the bending deformation of the filament in actual use. The bending brittleness of the filament is evaluated by bending the 3d printer filament several times and observing whether it has cracks or breaks.

Test standard

When conducting filament brittleness test, relevant national standards and industry standards should be followed to ensure the standardization of the test and the reliability of the results. Common test criteria include:

GB/T 1682-2014: Determination of low temperature brittleness of vulcanized rubber - single sample method.

GB/T 6849-1995: Brittle wedge test method for photographic film and paper.

ASTM D3332-1999: Test method for the Determination of Mechanical Impact Brittleness of products by impact machines.

ISO 10587-2000: Metal and other inorganic coatings Metallic and uncoated external threaded parts and bars surface residual brittleness test oblique wedge method.

Application example

The brittle test results of filament rods have a wide range of applications in many fields. The following are some typical application examples:

Aerospace: Aerospace materials and detectors need to operate at extremely low temperatures. Through the low temperature brittleness test, the performance of these materials under extreme conditions can be evaluated to ensure the safety of flight missions.

Material selection for nuclear power plants: Key materials for nuclear power plants need to maintain their properties at extremely low temperatures. Brittleness testing can assess the reliability of these materials at low temperatures, thereby optimizing material selection and improving the safety of nuclear power plants.

Automotive manufacturing: Automotive parts may exhibit brittleness at low temperatures. Through brittleness testing, the low temperature resistance of these components can be assessed, thus optimizing the design of automotive products.

Building insulation materials: Building insulation materials need to maintain their performance at low temperatures. Through brittleness testing, the performance of these materials at low temperatures can be evaluated to ensure the safety and energy efficiency of the building.

Matters needing attention

When conducting filament brittleness tests, the following points need to be noted:

Test environment control: Conditions such as temperature and humidity of the test environment have a significant impact on the test results. Therefore, it is necessary to strictly control the test environment and eliminate interference factors.

Test method selection: The appropriate test method and standard should be selected according to the specific application scenario and performance requirements of the filament. For example, the low temperature brittleness test is suitable for evaluating the performance of the filament at low temperatures, while the impact brittleness test is suitable for evaluating the impact resistance of the filament.

Data analysis and result interpretation: Test data analysis and result interpretation should be scientific and reasonable. According to the specific application scenario and engineering practice, the corresponding optimization scheme and implementation plan are formulated.

The brittleness test of filament is an important means to evaluate its performance under extreme conditions. By selecting appropriate test methods and standards, strictly controlling the test environment and scientifically analyzing the test data, the brittleness performance of the filament can be effectively evaluated to ensure its reliability and safety in various application environments.