GB/T 5349-1985 Test method for axial tensile properties of fiber reinforced thermosetting plastic pipes

GB/T 5349-1985 Test method for axial tensile properties of fiber reinforced thermosetting plastic pipes GB/T5349-1985 standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
GB/T5349-1985
Test method for axial tensile properties of fiber-reinforced thermosetting plastic pipes
National Bureau of Standards
1986-05-01
Page 1
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"Test method for axial tensile properties of fiber-reinforced thermosetting plastic pipes" Data number:
5349-1985
1 Definition,|| tt||2 Test specimen
3 Test conditions and equipment..
4 Test procedures
6 Test results
7 Test report
Additional notes:
Page 2
“Test method for axial tensile properties of fiber reinforced thermosetting plastic pipes” Material No.:
5349-1985
This method is applicable to the determination of axial tensile strength, tensile elastic modulus and elongation at failure ring of fiber reinforced thermosetting plastic pipes.
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《Fiber reinforced thermosetting plastics performance test method for axial tensile strength 1
5349-1985
Page 3
1 Definition
Fiber reinforced thermosetting plastic pipe refers to a tubular product with inorganic or organic fibers (or their products) as reinforcement material and thermosetting resin as matrix
《Fiber reinforced thermosetting plastics performance test method for axial tensile strength 1
5349-1985
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2 Test specimen
2.1 See Figure 1 (figure omitted) and Table 1 for the test specimen type and size. Length between two clamping sections L
≥450
Length of clamping section 1
50~100
2.2 The number of specimens shall be in accordance with Chapter 2 of GB1146-83 "General Rules for Test Methods for Properties of Fiber Reinforced Plastics". 2.3 The end face of the specimen shall be perpendicular to its axis and flat, without delamination, tearing, etc. The rest of the surface shall be free of damage. If there are tumors or other protrusions on the surface of the clamping section, they shall be smoothed, but damage to the reinforcing fibers shall be avoided as much as possible. Page 5
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"Test Method for Axial Tensile Properties of Fiber Reinforced Thermosetting Plastic Pipes
Raw Material Code+
5349-1985
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3.3 The clamping device shall have sufficient strength, rigidity and dimensional processing accuracy. Under the action of tension, the sample will not be damaged in the clamping section, and relative displacement with the sample should be avoided as much as possible. Figure 2 (Figure omitted) is applicable to the test conditions and equipment for the nominal diameter not more than 3
3.1 The test standard environmental conditions shall comply with the provisions of 3.1 in GB1446-83. 3.2 The sample state adjustment shall be placed in the laboratory standard environmental conditions for at least 40 hours. 3.5.1 When measuring strength, the conventional test is 10~12mm/min; the arbitration test is 56mm/min. 3.4 The test equipment shall comply with the provisions of Chapter 5 of GB1446-83. The structure diagram of the clamping device for 100mm sample (Figure omitted). 3.5.2 When measuring the elastic modulus and elongation at break, it is 2~3mm/min. 3.5 Loading speed
Test method for axial tensile properties of fiber-reinforced thermosetting plastic pipes
5349-1985
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4 Test steps
4.1 Process and inspect the appearance of the specimens according to 2.3. 4.2 Adjust the state of the specimens according to 3.2. 4.3 Number the qualified specimens and measure the dimensions. The measurement accuracy shall be in accordance with 4.1 of GB1446-83. 4.3.1 Measure the outer diameters in two mutually perpendicular directions at three different cross-sections between the two clamping sections of the specimen, and take the average value as the average outer diameter.
4.3.2 Measure the wall thickness at eight equally spaced positions on any end face of the specimen, discard the maximum and minimum values, and take the average value of the remaining points as the average wall thickness. For pipes with non-reinforced layers, the thickness of the reinforced layer should be measured in the same way, and its average value should be calculated.
4.4 Install the clamping device at both ends of the specimen. When installing, be careful not to damage the specimen. 4.5 Install the clamping device with the mounted specimen between the two chucks of the testing machine. When installing, align the core rod of the clamping device with the center line of the upper and lower chucks of the testing machine. 4.6 Load evenly and continuously until the specimen is destroyed. The loading speed shall be in accordance with the provisions of 3.5. Record the failure load (or maximum load) and the damage of the specimen.
4.7 If the specimen is destroyed in the clamping section or has obvious defects, it shall be discarded. If there are less than 5 valid specimens in the same batch, the test shall be repeated.
4.8 When measuring the elastic modulus, there is a self-recording device for continuous loading, otherwise, the loading shall be graded. The gauge length of the measuring instrument shall not be less than 50mm. The loading speed shall be in accordance with the provisions of 3.5. When using graded loading to measure the elastic modulus, it shall be divided into at least five levels. The maximum load applied shall not exceed the elastic deformation range of the material. Record the loads at each level and the corresponding deformation values. If the elongation at failure is to be determined, the load shall be continuously applied and the total elongation within the measuring gauge length when the specimen fails shall be recorded. Page 7
Fiber-reinforced thermosetting plastic pipe and shaft factory
Test method for axial tensile properties
5349-1985
5.1 The axial tensile strength shall be calculated according to formula (1): Where: ot-
5 calculation
J (Dt)t
- axial tensile strength, MPa (kgf/cm2); P - breaking load (or maximum load), N (kgf); - average outer diameter of the specimen, mm (cm);
- average wall thickness of the specimen (for pipes with non-reinforced layers, it should be the average thickness of the reinforced layer), mm (cm). 5.2 The axial tensile elastic modulus is calculated according to formula (2): LO·AP
J (Dt)t.Al
Wherein: Et-
Axial tensile elastic modulus, MPa (kg/cm2); LO instrument measurement gauge length, mm (cm):
△P Load increment within the elastic range of the material, N (kgf): AL-
Deformation increment within the gauge length LO corresponding to the load increment △P, mm (cm); D, tSame as formula (1)
5.3 The elongation at failure is calculated according to formula (3):
Wherein: 8-
Elongation at failure, %;
Total elongation within the gauge length LO when the specimen fails, mm (cm) LOSame as formula (2).
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《Fiber reinforced thermosetting plastic pipe axial tensile performance test method》Material
5349-1985
Test results
According to the provisions of Chapter 6 of GB1446-83
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Performance test square depth
《Fiber reinforced thermosetting plastic pipe axial tensile performance test method》Material
5349-1985|| tt||Page 9
7 Test Report
According to the provisions of Chapter 7 of GB1446-83
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Energy Test Method
Fiber Reinforced Thermosetting Plastics
Tube and Axle Factory
Stretchability 1
5349-1985
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Additional Notes:
This standard was proposed by the State Bureau of Building Materials Industry and is under the jurisdiction of the National Technical Committee for Standardization of Fiber Reinforced Plastics. .sinoaec.com
This standard was jointly drafted by Harbin Institute of Architecture and Civil Engineering, Ministry of Urban and Rural Construction and Environmental Protection, Shanghai Materials Research Institute, Ministry of Machinery Industry, and Beijing Glass Fiber Reinforced Plastics Research Institute, State Bureau of Building Materials Industry. The main drafters of this standard are He Shoujian, Zhao Jinghai, Shi Yongyu, Zhu Lizhen, Wang Zhenhua, He Xiaoyuan. "Fiber Reinforced Thermal
Test Method bzxZ.net
Solid
Plastic
5349-1985
Page 11
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