GB/T 37794-2019 English PDF

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GB/T 37794-2019: Carbon fibre - Determination of knot strength
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 37794-2019	119	Add to Cart	3 days	Carbon fibre - Determination of knot strength	Valid

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Basic data

Standard ID: GB/T 37794-2019 (GB/T37794-2019)
Description (Translated English): Carbon fibre - Determination of knot strength
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Q36
Classification of International Standard: 59.100.20
Word Count Estimation: 6,636
Date of Issue: 2019-08-30
Date of Implementation: 2020-07-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 37794-2019: Carbon fibre - Determination of knot strength

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Carbon fibre - Determination of knot strength ICS 59.100.20 Q36 National Standards of People's Republic of China Determination of tensile strength of carbon fiber nodules Published on.2019-08-30 2020-07-01 implementation State market supervision and administration China National Standardization Administration issued

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard was proposed by the China Building Materials Federation. This standard is under the jurisdiction of the National Glass Fiber Standardization Technical Committee (SAC/TC245). This standard was drafted. Inner Mongolia Aerospace Honggang Machinery Co., Ltd., Nanjing Glass Fiber Research and Design Institute Co., Ltd. The main drafters of this standard. Zhang Pengfei, Xie Deyou, Xu Qi, Zhang Zeru, Guo Xiaodong, Chen Xiaopeng, Guo Xiufang, Zhao Hongbao, Yang Zaiqing, Zhang Yongsheng. Determination of tensile strength of carbon fiber nodules

1 Scope

This standard specifies the method for determining the tensile strength of carbon fiber nodules. This standard applies to polyacrylonitrile-based carbon fibers with a tow size of 24k and below.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. Determination of tensile properties of GB/T 26749 carbon fiber dipped yarn

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 Nodular tensile strength knotstrength Tensile strength after knotting. Note. in megapascals (MPa).

4 Principle

The knotted tow is stretched to break under uniform loading by a suitable mechanical device. Tensile strength divided by breaking load divided by tow cross section Get it.

5 test equipment

5.1 Tensile testing machine. Constant velocity elongation (CRE), the speed can be constant within the range of (20 ± 3) mm/min. The accuracy of the load reading is higher than the test 1% of the value. 5.2 Fixture. It should ensure that the center line of the sample is consistent with the central axis of the test machine. The clamping surface of the clamp should be guaranteed not to damage the sample and not in the fixture. Slip. If the clamped specimen does not meet the requirements, use a gasket, zigzag or corrugated clamp, paper, felt, leather, plastic or rubber sheet. Can be used as a gasket material. Pneumatic clamps are recommended.

6 sample

6.1 Shape and size The shape and dimensions of the sample are shown in Figures 1 and 2. ......

Image     

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