Tensile testing machine, which mechanical properties can be tested? Bend, shear, stretch

Tensile testing machine, which mechanical properties can be tested? Bend, shear, stretch
Tensile testing machine is a widely used laboratory test equipment used to measure the mechanical properties and stress-strain characteristics of objects. Tensile testing machines are usually used to test materials, such as steel, polymers, metals, composite materials, etc., and are widely used in quality control and research and development in all walks of life. This paper will introduce the use of tensile testing machine, fault maintenance and mechanical testing in detail.

Use a tensile testing machine
Before using the tensile testing machine, ensure that the operator has received the relevant training and skills certification. Before conducting the test, please refer to the test standards to understand the test methods and procedures. Before you use the testing machine, please check the following carefully:

1. Check the power supply and grounding wire of the tensile testing machine to ensure that they are in good condition. Replace damaged components if necessary.

2. Clean and calibrate the tension sensor and displacement sensor. Check the condition of the fixture or pliers and confirm that they are able to tighten and maintain the stability of the sample.

3. Set test parameters, including test method, speed, strength and size, shape and material of the tested sample.

4. Install the sample to be tested on the fixture or pliers, and fix the probe on the beam of the testing machine. Calibrate the tester to ensure that the probe is perpendicular to the sample being tested and perform zero calibration before the test begins.

5. Before starting the test, please ensure that all measuring equipment and sensors are working properly. After starting the test, observe all measurements and record the data.

6. During the test, please keep an eye on the status of the sample and the operation of the testing machine. If abnormal conditions occur, stop the test immediately and check and adjust.

 Mechanical test

Tensile testing machines can be used for different types of mechanical tests, such as tensile testing, compression testing, shear testing, bending testing, etc.

The principles and methods of different tests are slightly different, but they all require the use of a tensile testing machine to measure force and displacement. Several common test types are described in detail below:

1. Tensile test: Tensile test is one of the most common types of mechanical test, which can measure the tensile strength and breaking strength of materials. In the tensile test, the sample will be mounted on a fixture or pliers of the testing machine, and then tension will be applied until the sample is stretched to the breaking point. At this point, the tester will record tension and displacement and plot a stress-strain curve to determine the tensile properties of the sample.

2. Compression test: In compression test, the tested sample will be installed in a clamp or pliers, and then pressure will be applied until the material breaks during compression. This measures the compressive strength and fragmentation modulus of the material.

3. Shear test: The shear test evaluates the shear strength and shear modulus of the material under different stress and strain. In the shear test, the tested material is cut and the force is applied, the changes in shear stress and shear strain are recorded, and the shear force and deformation curves are drawn.

4. Bending test: This test is used to measure the bending strength and modulus of the material. In a bending test, the sample is applied with a lower force to produce a curve, and the stress, strain and deformation rate are recorded.

Fault maintenance

When using tensile testing machines, we also need to have a clear understanding of possible failures and how to perform repairs. Here are some possible failures and troubleshooting suggestions:

1. Tensile testing machine can not start or crash: check whether the power supply and wire are properly connected, and try to restart the testing machine. If it still does not start, contact the device manufacturer for further troubleshooting.

2. The test results do not match the standard values: check whether the test method and parameters are correctly set, and ensure that the sample is free from external interference during installation and testing.

3. The controller displays an error code: ask the operation manual to determine the meaning of the error code and take appropriate corrective action.

4. Fixture or displacement sensor failure: Clean and calibrate the fixture or displacement sensor, and confirm that they can work properly with the testing machine.