ASTM D2290 plastic pipe hoop tensile strength tester

Description
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1. Introduction of testing machine

WDW-150KN microcomputer controlled plastic pipe tensile strength tensile testing machine is used to test the tensile strength of plastic pipe ring specimens. The test machine measurement control system adopts microcomputer closed-loop control, which has a wide and accurate loading speed and force measurement range, and has high precision and sensitivity for the measurement and control of load and displacement.

2.relative test method

ASTM D2290 standard test method for apparent hoop tensile strength of plastic or reinforced plastic pipe

GB/T 2611 testing machine General technical requirements

GB/T 16491 electronic universal testing machine

GB/T 13634 Calibration of standard dynamometer for single-axis testing machine inspection

ISO 376 Metallic materials-calibration of force-proving instruments used for the verification of uniaxial testing machines

GB/T 16825.1 Inspection of static single-axis testing machines - Part 1 : Tests and s

ISO 7500-1 metallic materials-verification of static uniaxial testing machines- parts 1: tension/compression testing machines-verification and calibration of the force-measuring system

GB/T 228 metal materials tensile test method at room temperature

GB/T 232 metal material bending test method

GB/T 7314 metal materials room temperature compression test method

3. Features of the testing machine

3.1 The testing machine has beautiful appearance, convenient operation and stable performance

3.2 The AC servo speed control system with high speed control accuracy and stable performance is used as the driving system, and the loading is stable and reliable.

3.3 The synchronous toothed belt deceleration system and the ball screw pair drive the movement of the moving beam of the testing machine, and the displacement measurement is accurate

3.4 The test software is based on the windows operating platform, and the test data can be displayed in real time. After the test is completed, it can be queried, printed, and compared.

3.5 The test software adopts closed-loop control to realize tests such as constant force, constant displacement, constant strain, constant velocity load cycle, and constant velocity deformation cycle, and can switch smoothly between various control modes

4. Scope of use

The testing machine can be used for material inspection and analysis in construction materials, aerospace, machinery manufacturing, wire and cable, rubber and plastics, automobile manufacturing, shock absorption systems and other industries. Ideal test equipment for other departments.

5. Technical parameters

No	Item	Specification
1	Force capacity	150KN
2	Measuring range	0.4%-100%FS
3	Accuracy of force value	Less than ±0.5% of set value
4	Precision of displacement	0.001mm
5	Accuracy of displacement value	±0.5%
6	Deformation measuring range	0.4%-100%FS
7	Accuracy of deformation measuring	±0.5%
8	Resolution of deformation	0.001mm
9	Force speed range	0.005-5%FS/S
10	Accuracy of force speed	Less than ±1% of set value
11	Deformation speed range	0.02-5%FS/S
12	Accuracy of deformation speed control	When set value is less than 0.05%FS，error is less than ±2.0% of set value When set value is more than 0.05%FS，error is less than ±0.5% of set value
13	Displacement speed range	0.001-500mm/min
14	Accuracy of displacement speed	When speed is less than 0.01mm/min，error is less than ±1.0% of set value When set value is more than 0.01mm/min，error is less than ±0.2% of set value
15	Range of constant force, constant deformation, constant displacement control	0.5％～100％FS
16	Accuracy of constant force, constant deformation, constant displacement control	When set value is less than 10%FS，error is less than ±1.0% of set value When set value is more than 10%FS，error is less than ±0.1% of set value
17	Accuracy of deformation speed	When set value is less than 0.05%FS，error is less than ±2.0% of set value When set value is more than 0.05%FS，error is less than ±0.5% of set value
18	Tension space	800mm
20	Voltage	Single phase,220V±10%,50Hz(110V)
21	Motor power	3.5KW
22	Dimension	1150x850x2600mm
23	Weight	1400kg

How to Select the Right Tensile, Compression, Bending, Shear, Peel, and Tear Testing Machine: Calculation Formulas with Examples

Selecting the appropriate testing machine for tensile, compression, bending, shear, peel, and tear tests requires careful consideration of multiple factors, including the force range, specimen dimensions, test standards, and machine capabilities. Below are the key calculation formulas to help determine the necessary machine specifications, along with examples for better understanding.

1. Tensile Testing Machine Selection

Tensile testing machines measure the maximum tensile strength and elongation of materials.

Key Formula:

F_max=σ_max × A

Where:

F_max = Maximum required force (N)

σ_max = Ultimate tensile strength of the material (MPa)

A = Cross-sectional area of the specimen (mm²)

Example: For a steel specimen with σ_max =400MPa and cross-sectional area A =100mm²:

F_max=400 × 100=40,000N (40kN)

A 50 kN tensile testing machine would be suitable.

2. Compression Testing Machine Selection

Compression tests determine a material's resistance to compressive forces.

Key Formula:

F_max=σ_c × A

Where:

F_max = Maximum required force (N)

σ_c = Compressive strength of the material (MPa)

A = Cross-sectional area of the specimen (mm²)

Example: For a concrete cube with σ_c =30MPa and A =150²=22,500mm²:

F_max=30 × 22,500=675,000N (675kN)

A 1000 kN compression testing machine would be ideal.

3. Bending Testing Machine Selection

Bending tests evaluate the flexural strength of materials.

Key Formula for Three-Point Bending:

Where:

σ_f = Flexural stress (MPa)

F= Applied force (N)

L= Span length (mm)

b= Width of the specimen (mm)

h= Thickness of the specimen (mm)

Example: For a wooden beam with L=500mm, b=50mm, h=25mm, and requiring a stress of 10 MPa:

A 5 kN bending tester would be suitable.

4. Shear Testing Machine Selection

Shear tests determine the shear strength of materials.

Key Formula:

F_max=τ × A

Where:

F_max = Maximum shear force (N)

τ= Shear strength of the material (MPa)

A = Shear area (mm²)

Example: For an aluminum sheet with τ=90 MPa and A=200mm²:

F_max=90×200=18,000N(18kN)

A 20 kN shear testing machine is recommended.

5. Peel Testing Machine Selection

Peel tests measure the adhesion strength between bonded materials.

Key Formula:

Where:

P= Peel strength (N/mm)

F= Measured force (N)

W= Width of the specimen (mm)

Example: For a tape with F=50N and W=25mm:

A peel testing machine with at least 5 N force capacity is required.

6. Tear Testing Machine Selection

Tear tests determine the resistance of a material to tearing forces.

Key Formula:

Where:

F_tear= Tear strength (N/mm)

F= Measured force (N)

t= Thickness of the specimen (mm)

Example: For a rubber sheet with F=100N and t=2mm:

A tear testing machine with 100 N capacity is needed.

When selecting a testing machine, ensure that the maximum force capacity of the machine is at least 1.2 to 1.5 times the calculated force to account for safety margins and unexpected variations. Additionally, consider compliance with relevant test standards (ASTM, ISO, GB, EN, JIS) and machine features such as speed control, data acquisition, and test automation.

By using the above formulas and examples, engineers and manufacturers can accurately determine the appropriate testing machine specifications for their specific material and application requirements.