This standard specifies apparatus, specimens, test conditions, test procedures, calculation of test results and test report for test methods for tensile properties of carbon fiber multifilament.
This standard is applicable to determination of tensile strength, tensile modulus of elasticity and elongation at break of gummed and cured 1 K~24 K carbon fiber multifilament.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 1446 The Generals of Test Methods for Properties of Fiber-reinforced Plastics
GB/T 30019 Carbon Fiber—Determination of Density
3 Terms and Definitions
For the purposes of this document, the following term and definition apply.
3.1
multifilament
A kind of filament, threadlet made by multi-hole spinnerette or twisted/untwisted yarn from such threadlet
4 Apparatus
4.1 Tester: complying with GB/T 1446, automatic record of load-displacement curve.
4.2 Extensometer: extensometer weight has no influence on the measuring accuracy that shall meet the requirements of GB/T 1446.
4.3 Clamp: it, when connected with the tester, shall ensure that the specimen is centered during tension; a clamp shall be suitable for clamping specimens with paper as stiffener, and pneumatic clamping should be adopted.
4.4 Drying oven: temperature meets specimen curing requirements and temperature control accuracy is not less than ±2℃.
