Key points of carbon fiber rod compression test

Key points of carbon fiber rod compression test

Carbon fiber rods are widely used in many fields due to their excellent properties such as high strength and low density.The compression test conducted on it this time can effectively evaluate its performance under pressure conditions and provide key basis for product design and application.

The following are the key points of the carbon fiber rod compression test. During the test, we used Huayan’s 10-ton universal testing machine (this machine is equipped with a reducer first-level transmission system, which runs more smoothly and has lower noise, providing a strong guarantee for the accurate conduct of the test).

1.Preparation before test

(1)Sample preparation

1.Dimensional requirements: According to relevant standards (such as GB/T 3856-2005 "Carbon Fiber Reinforced Plastic Compression Performance Test Method"), select the length, diameter and other dimensions of the sample carbon fiber rod sample.Generally speaking, the length of the sample must ensure that axial compression deformation mainly occurs during the compression process to avoid problems such as end effects due to too short length. The diameter must be uniform and the deviation must be controlled within a small range.

(2)Equipment debugging

1. Universal testing machine inspection: Turn on the 10-ton universal testing machine and check whether all components of the equipment are operating normally.Check the working status of the first-level transmission system of the reducer to confirm that the transmission is stable and there is no abnormal noise.Check whether the force sensor, displacement sensor, etc. have been calibrated to ensure the accuracy of the detection data.

2. Clamp adaptation: Select a clamp suitable for the carbon fiber rod compression test. The clamp must be able to apply pressure evenly and have good contact with the end of the specimen to avoid stress concentration due to clamp problems and affect the test results.When installing the fixture, ensure the coaxiality between the fixture and the testing machine. Pre-centering operations can be performed to make the specimen axis coincide with the loading axis of the testing machine.

2.Test process

(1)load control

1.Loading rate: Set an appropriate loading rate according to standard regulations or test requirements.Generally, the loading rate of carbon fiber rod compression tests should not be too fast to avoid brittle failure of the specimen due to too high a loading rate, which cannot accurately reflect its true compression performance.

2.Real-time monitoring: During the loading process, the monitoring system of the universal testing machine is used to observe the changes in force value, displacement and other data in real time.Pay attention to the deformation of the carbon fiber rod, such as whether there are bends, wrinkles, etc. If there are any abnormalities, stop the test in time, analyze the reasons, and adjust the test plan.

(2)data logging

When the carbon fiber rod reaches compression failure or the test reaches the preset conditions, key data such as maximum compression force and compression displacement are recorded.At the same time, abnormal conditions during the test process are recorded to provide reference for subsequent test analysis.

3. Post-test analysis

(1)Data processing

Calculate the compressive strength of the carbon fiber rod based on the maximum recorded compressive force and the cross-sectional area of ​​the specimen.Analyze the displacement-force curve of the carbon fiber rod during the compression process to understand its deformation rules, such as the characteristics of the elastic deformation stage, plastic deformation stage, etc.

(2) Result evaluation

Combined with data such as compression strength and deformation, evaluate whether the compression performance of the carbon fiber rod meets the design requirements or relevant standards.The compression test results of carbon fiber rods prepared by different batches and processes can also be compared.Analyze the impact of process parameters on its compression performance to provide improvement basis for the production and application of carbon fiber rods.

In addition, with the help of our Huayan 10-ton universal testing machine equipped with a reducer first-level transmission system, the compression test process of carbon fiber rods can be made more stable and efficient, and the data obtained can be more accurate and reliable, laying a solid foundation for performance testing for the rational application of carbon fiber rods in various fields. Friends in need can learn more ♥.