GB/T 44752-2024 in English
VALIDTest method for bending fatigue of flexible glass
- Issued on:2024-10-26
- Implemented on:2025-05-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$204.00
《GB/T 44752-2024柔性玻璃弯曲疲劳试验方法》由TC447（全国工业玻璃和特种玻璃标准化技术委员会）归口，主管部门为中国建筑材料联合会。
Introduction
Flexible glass bending fatigue test method: in-depth interpretation of GB/T 44752-2024 standard
With the wide application of flexible glass in display panels, wearable devices and other fields, its bending resistance and durability have become the focus of industry attention. In order to standardize the bending fatigue test method of flexible glass, the national standard GB/T 44752-2024 came into being. The standard specifies the requirements for test equipment, sample preparation and test procedures in detail.
Background of standard formulation and analysis of technological evolution
As a high-performance material, the bending fatigue performance of flexible glass directly affects the service life and reliability of the product. In recent years, with the rapid development of display technology and electronic devices, the demand for flexible glass has continued to increase. However, due to the special properties of flexible glass (such as high flexibility and high strength), traditional glass testing methods can no longer meet its testing needs.
The formulation of GB/T 44752-2024 standard fills this technical gap and provides a scientific basis for the performance evaluation of flexible glass by introducing the two-point bending method and bending fatigue test equipment. This standard is based on a large amount of experimental data and technical accumulation, combined with relevant research results at home and abroad, and finally forms a complete set of test methods.
Test principle and equipment requirements
According to GB/T 44752-2024, the flexible glass bending fatigue test adopts the two-point bending method. Its core principle is to apply periodic bending loads to the specimen through fixed plates and moving plates to simulate the stress state in actual use.
| Equipment parameters | Technical requirements | Example values |
|---|---|---|
| Drive motor | Provide stable bending frequency and loading force | 20 times/min ~60 times/min, not less than 100 N |
| Fixed plate and movable plate | Parallelism error ≤0.02 mm, surface roughness Ra≤0.8 μm | Adjustable range of plate spacing: 0 mm~150 mm |
| Bending curvature radius characterization device | Conform to GB/T 38686—2020 requirements, support image recognition and processing | Measurement accuracy ±5% R |
Explanation of professional terms and practical application cases
Unidirectional bending fatigue: Refers to the performance degradation process of the sample under compression and extension in a single direction. For example, when the mobile phone screen is repeatedly folded, the flexible glass will undergo multiple unidirectional bending cycles.
Maximum plate spacing and minimum plate spacing: Correspond to the maximum bending curvature radius and minimum bending curvature radius of the sample respectively. By adjusting the plate spacing, the stress state under different use conditions can be simulated.
Comparative analysis of standard frameworks
| Dimensions | GB/T 44752—2024 | Related international standards | Difference analysis |
|---|---|---|---|
| Test methods | Two-point bending method | Multi-point loading method | GB/T 44752—2024 is more targeted and operational |
| Equipment requirements | High-precision control (±1 time/min) | ±3% deviation allowable range | Domestic standards are more stringent |
| Specimen size | Length: 100 mm~200 mm, width: 20 mm~150 mm | No clear regulations | Added dimensional requirements in actual operation |
Implementation suggestions and future prospects
To ensure the effective implementation of GB/T 44752—2024 standard, it is recommended that:
- Strengthen the calibration and maintenance of test equipment to ensure that the measurement accuracy meets the requirements.
- Establish a unified sample preparation specification to reduce test deviations caused by sample differences.
- Promote the application of the standard in actual production and improve product quality and technical level.
In the future, with the development of flexible glass technology, the standard will continue to be optimized and expanded to meet the needs of more application scenarios.
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