GB/T 40398.2-2021 specifies the test method for determining the flexural properties of carbon-carbon composite carbon materials at room temperature. It is applicable to three-dimensional needled and quasi-three-dimensional needled carbon-carbon composite materials and can also be referenced for similar structural products. The standard defines the test principle, specimen preparation, operational procedures, and data calculation requirements. The core equipment includes a universal testing machine with a capacity of 50 kN, paired with instruments such as a vernier caliper with an accuracy of 0.02 mm and a deflection gauge. Using a three-point bending loading mode, pressure is applied at a specific rate to measure the maximum load and deformation of the specimen. Based on these measurements, the flexural strength and flexural elastic modulus are calculated, providing a standardized basis for material quality evaluation and application design.
| Status | Active | ||
|---|---|---|---|
| CCS | Q50 | ICS | 29.050 |
| Release Date | 2021-08-20 00:00:00 | Implementation Date | 2022-03-01 00:00:00 |
