This standard specifies the test principle, specimen preparation, operating procedures, and data processing for determining the bending strength of glass materials, utilizing two core methods: the three-point bending method and the four-point bending method. The three-point bending method is suitable for brittle glass, while the four-point bending method is applicable to flat glass; neither method is suitable for glass with a thickness below 3 mm or for composite glass. The test involves applying a static bending load to fracture the specimen, and the strength value is calculated based on the maximum bending stress at the cross-section. Relevant testing instruments include a universal testing machine with a load indication error of ≤ ±1%, equipped with hardened steel supports and pressure rollers (elastic modulus ≥ 200 GPa), as well as a vernier caliper with an accuracy of 0.02 mm. For four-point bending tests, specialized support rollers and bending rollers capable of free rotation must also be provided.
| Status | Active | ||
|---|---|---|---|
| CCS | Q30 | ICS | 81.040.10 |
| Release Date | 2019-08-30 00:00:00 | Implementation Date | 2020-07-01 00:00:00 |
