3K carbon fiber coiled pipe It is a composite product with high strength and lightweight characteristics. It is widely used in aerospace, automobile industry, sports equipment and other fields. This article will focus on 3K Carbon fiber coiled pipe To reveal its mechanical properties, test and analyze the bending properties.

First, we select a sample of 3K carbon fiber coil for testing. The sample is 1m long and 5mm in diameter. The test is carried out with a universal material testing machine, and the bending test is carried out according to ASTM standards.

In the first test, we applied bending force at the speed of 20 degrees/minute, and recorded the relationship between force and displacement. It can be seen from the chart that the 3K carbon fiber coiled pipe has good elasticity in the bending process and maintains a stable displacement after reaching a certain bending degree.

Next, we will increase the bending force and continue the test. It is found that the displacement of 3K carbon fiber coiled pipe increases with the increase of bending force. However, when the bending force exceeds a certain threshold, the 3K carbon fiber coiled tube breaks. This shows that the 3K carbon fiber coiled pipe can bear more force within the bending limit range.

In order to understand the bending performance of 3K carbon fiber coiled pipe in more detail, we further carried out finite element analysis. The model of 3K carbon fiber coiled tube sample is imported into the finite element software, and different bending forces are applied for simulation.

The results of finite element analysis show that the bending process of 3K carbon fiber coiled pipe presents nonlinear characteristics. In a small range, the bending force has a linear relationship with the displacement of the coiled pipe; When the bending force exceeds a certain threshold, the displacement of the coiled pipe increases rapidly, resulting in bending failure.

Further analysis found that local stress concentration occurred in the bending process of 3K carbon fiber coiled pipe. This is because carbon fibers are densely arranged, resulting in fiber fracture in the area with large bending displacement.

Based on the above test and analysis results, we can conclude that 3K carbon fiber coiled pipe has good bending performance and can withstand large bending force within a certain range. However, in the process of bending, attention should be paid to the size of the control force, so as to avoid cracking due to exceeding its limit range.