Performance test standards for carbon fiber boards
Performance test standards for carbon fiber boards
Carbon fiber boards are widely used in aerospace, automobile manufacturing, building reinforcement and other fields due to their light weight, high strength and corrosion resistance. In order to ensure the quality and performance of carbon fiber boards, performance testing is essential. This article will introduce the performance test standards for carbon fiber boards in detail.
1. Tensile strength and elastic modulus
Tensile strength and elastic modulus are important parameters for measuring the strength and stiffness of carbon fiber boards. The values of tensile strength and elastic modulus can be obtained by measuring the load and displacement changes of the material during the tensile test.
- Test standard: GB/T3354-2014 "Test method for tensile properties of oriented fiber reinforced polymer matrix composites"
- Test method: Clamp the carbon fiber board sample on the tensile testing machine, apply tension at a constant speed, record the load-displacement curve of the sample, and calculate the tensile strength and elastic modulus.
2. Flexural strength and flexural modulus
Flexural strength and flexural modulus are common methods for evaluating the performance of carbon fiber boards under bending loads. The bending strength and bending modulus are calculated by applying bending force to make the material produce curvature and measuring the relationship between force and displacement.
- Test standard: ASTMD7905/D7905M-19e1 "Test method for type II interlaminar fracture toughness of unidirectional fiber reinforced polymer matrix composite materials"
- Test method: Place the carbon fiber plate specimen on a three-point bending tester, apply bending force at a constant speed, record the load-displacement curve of the specimen, and calculate the bending strength and bending modulus.
3. Fracture toughness
Fracture toughness is an important indicator for evaluating the material's ability to resist crack propagation. Impact tests are usually used to measure the fracture toughness of materials. By applying high-speed impact loads, the absorbed energy of the material during crack propagation is measured to evaluate its toughness.
- Test standard: HB7402-1996 "Test method for type I interlaminar fracture toughness of carbon fiber composite laminates"
- Test method: Clamp the carbon fiber plate specimen on the impact tester, apply impact force at high speed, record the impact energy of the specimen, and calculate the fracture toughness.
4. Thermal performance
The performance of carbon fiber boards in high temperature environments is crucial for material selection and use in some specific application scenarios. Testing of parameters such as thermal expansion coefficient, thermal conductivity and heat resistance can help material users understand the performance of materials at high temperatures.
- Test standard: GB/T8924-2005 "Fiber reinforced plastic combustion performance test method oxygen index method"
- Test method: Use a thermal analyzer (such as differential scanning calorimeter DSC) to measure the thermal expansion coefficient, thermal conductivity and heat resistance of carbon fiber boards.
5. Conductive performance
Carbon fiber itself has excellent conductive properties, but in carbon fiber composite boards, due to the presence of resin matrix, the conductive properties may be affected to a certain extent. Testing the conductive properties of carbon fiber composite boards can help evaluate their application potential in conductivity.
- Test standard: GB50728-2011 "Technical Specifications for Safety Identification of Engineering Structure Reinforcement Materials"
- Test method: Use the four-probe method or resistance tester to measure the resistance value of the carbon fiber board and calculate its conductivity.
Conclusion
The performance test standard of carbon fiber board includes tests on tensile strength and elastic modulus, flexural strength and flexural modulus, fracture toughness, thermal properties and conductivity. By testing and evaluating these indicators, we can understand the performance characteristics of the material and provide a scientific basis for its application in different fields.
If you have more questions about the performance test standard of carbon fiber board, please feel free to ask questions.
