GB/T 32788.4-2016 in English
VALIDTest method for properties of prepreg―Part 4:Determination of tensile strength
- Issued on:2016-06-14
- Implemented on:2017-05-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$136.00
《GB/T 32788.4-2016预浸料性能试验方法 第4部分：拉伸强度的测定》由TC39（全国纤维增强塑料标准化技术委员会）归口，主管部门为中国建筑材料联合会。
Introduction
1. Standard Overview
GB/T 32788.4-2016 "Prepreg Performance Test Methods Part 4: Determination of Tensile Strength" is a Chinese national standard, which is specifically used to determine the tensile strength of unidirectional prepregs with carbon fiber, glass fiber and other reinforcement materials. The standard was officially implemented on May 1, 2017.
2. Background and significance of standard formulation
With the increasing application of composite materials in aerospace, automobile manufacturing and construction, the requirements for prepreg performance are also getting higher and higher. Tensile strength is one of the key indicators for evaluating the mechanical properties of prepregs. The formulation of this standard provides a scientific basis for unifying the determination method of prepreg tensile strength in the industry.
3. Comparison of standard frameworks
| Dimensions | Requirements of this standard | Comparison with relevant international standards |
|---|---|---|
| Test principle | Tensile loading to failure, record the failure load to calculate the strength. | Consistent with ISO standards, using the same basic principles. |
| Instruments | Testing machine, analytical balance, air drying oven, etc. | International standards have similar requirements, but some details are different. |
| Specimen preparation | Same size, no less than 5 pieces. | There are differences with the ASTM standard, but both meet the basic requirements of material performance testing. |
4. Implementation Recommendations
4.1 Test Condition Control
In actual operation, it is recommended to strictly control the temperature and humidity of the test environment. According to the standard requirements, if the prepreg does not require state adjustment, it can be tested directly; otherwise, it needs to be adjusted in the test environment for at least 2 hours.
4.2 Data Processing and Analysis
Calculate the cross-sectional area of the fiber bundle according to Appendix A, and calculate the tensile strength in combination with the breaking load. It is recommended to use professional software for data statistics and analysis to ensure the accuracy of the results.
4.3 Inter-laboratory Collaboration
Since the current standard does not include a precision report, it is recommended that laboratories strengthen cooperation and jointly accumulate test data to provide support for future revisions.
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