20 ton tension stress tester

Description
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20 ton tension stress tester

1 Introduction

l Suitable for tension, compress, shear, peeling, tear, test

l Attractive appearance, easy operating, stable and reliable

l Dual test space, upper space for tension test, bottom space for compress test

l Crossbeam speed can reach up to 1000mm/min, suitable for most test speed

l Low noise during test

l Suitable for industries of metal manufacturing, non-metal manufacturing, industrial and mining enterprises, technical supervision, commodity inspection and arbitration and other departments

2. Test method

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. Technical parameters

No	Item	Specification
1	Force capacity	200KN 300KN
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	600mm
20	Voltage	Single phase,220V±10%,50Hz(110V)
21	Motor power	3.5KW
22	Dimension	1150x850x2600mm
23	Weight	1400kg

4. software introduction

4.1 auto stop: crossbeam auto stop when sample break

4.2 auto save: test parameters, test curves and test results can be auto saved after test

4.3 speed adjusting: speed of crossbeam can be adjusted during test automatically or manually

4.4 auto calibrating: system can do auto calibrating

4.5 easy operate: computer software can auto finish test procedures, measuring, displaying and analyze test data.

4.6 batch test: for test sample with same parameters, test can be finished in order after one time setting

4.7 display mode: data and curves can be displayed during test in real time

4.8 curve scanning: test curves can be re-analyzed after test, test date of each point on the test curve can be displayed via mouse click

4.9 curve choosing: stress-strain curve, force-displacement curve, force-time curve, displacement-time curve can be chosen accords with test requirement.

4.10 test report: test report can be printed in different format

4.11 stroke protection: mechanism and program control protecting functions

4.11 over load protecting: when force is more than 3%-5%of rated capacity, machine will auto stop.

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.