WDL-300KN electronic horizontal tensile testing machine

Description
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WDL-300L Electroic Servo Horizontal Tensile Testing Machine

1. Applications

Test types: tension test for steel rod, wire rope, steel wire, steel strand, chain or other samples required by client

Application field: construction and building industries, metallurgical industry, transportation industry, energy resources industry, scientific research unit, college and universities, quality inspection center, commodity inspection department, etc.

2. Introductions of the machine

l Adopt frame structure, electric loading, test force is loaded via precise ball screws.

l Equip with manually glass protecting shield, when doing test, close protecting shield for avoid any flying out of breaking test sample

l Computer test software display test force and displacement in real time and has functions of auto analyze, process and save test result. Printer is equipped for printing required test report.

l High rigid of main loading frame, small deformation during test, test space adjusted from 0mm to 5m range continuously

l Adopt closed loop control to drive electroic servo control system, computer software control test procedures. It loads stably and continuously and has functions of force maintaining, auto collecting test data and display test curves.

3. machine pictures for reference

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4. technical specifications

Force capacity	300KN
Frame structure	Servo motor and driver, ball screws guiding
Loading speed	0.5-50Kn/S
Control mode	Computerized electronic servo control
Test type	Tension test in ambient temperature
Over load protecting	105% of force capacity
Accuracy of force indicating	Better than ±1%
Resolution of force	1/500000 in whole capacity
Force measuring range	1%-100%FS(0.5-50KN)
Accuracy of force control	Better than ±1%
Accuracy of stress control	Better than ±1%
Accuracy of displacement control	Better than ±1%
Resolution of displacement	0.001mm
Accuracy of displacement speed	Better than ±0.5%
Moving speed of crossbeam	0-150mm/min
Test space adjust range for tension test	according to test specimen size
Clamping method of tension grips	Pin through, wedge clamp
Max. distance between grips	according to test specimen size
Width for tension test(distance between two columns)	800mm
Center height for tension test	600mm
Dimension	according to specimen size
Weight	according to dimension

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.