What is Tensile Strength Tester? Working Principle & Testing Procedure

In today's quality-based manufacturing environment, the longevity of materials is critical. Material tensile failure is one of the most common problems industries are facing, which leads to product damage, safety issues, and customer complaints. To deal with this, a Tensile Strength Tester is used to determine how a material behaves under tensile forces.

The machine accurately determines the tensile strength, elongation, and breaking point for plastics, metals, textiles, and rubber materials. Identifying weak points before mass production allows producers to improve product design, ensure compliance with standards, and avoid costly failures. Thus, tensile testing is an important part of material quality control.

 

What is Tensile Strength of a Material? 

Tensile strength is the maximum amount of tensile (pulling) stress that a material can withstand before it fractures or breaks. It is a fundamental mechanical property that defines a material's resistance to being pulled apart and is typically measured during a tensile test. Tensile strength is expressed in units of force per unit area, such as megapascals (MPa) or pounds per square inch (psi).

During the removal of the stress, the plastic material undergoes:

• Elastic deformation: The material returns to its original shape. The deformation is temporary and reversible. Lasts for small strains.
• Plastic deformation: The material will no longer return to its original form. It is a permanent and irreversible process.

 

What is Tensile Strength Tester for Steel? 

A tensile strength tester for steel, commonly known as a universal testing machine (UTM), is a device used to evaluate the tensile strength and other properties of steel. It applies controlled tensile loads to a steel specimen until it breaks.

By conducting this test, engineers can determine the maximum strength that the material can withstand before breaking, as well as how much it can be stretched before failure occurs. The primary role of a tensile strength tester is to test the tensile strength, yield strength, ultimate tensile strength, and ductility of steel specimens. 

 

Tensile Strength Tester Working Principle 

A Tensile Strength Tester works on a mechanical principle: A controlled pulling force is applied to a specimen until it fractures, while accurately measuring both the applied force and the elongation of the sample. This device is essential for testing tensile strength, yield strength, and elongation of various materials, including plastic, rubber, metal, and fabric.

This standard tensile tester helps in assessing material quality, structural integrity, and suitability for use in applications like packaging, construction, or automobile components.

 

Components of Tensile Testing Machine

A tensile testing machine is a precise tool that is utilized to test the mechanical strength of materials by pulling them under controlled circumstances. It consists of several key parts that together test tensile strength, yield point, elongation, and modulus of elasticity.

Here are the parts described of a tensile Testing machine:

LOAD CELLS

The load cell converts the tensile force into an electrical signal that can be measured. ZwickRoell load cells, in addition to delivering high product quality, also provide maximum compatibility with all our machine parts.

EXTENSOMETERS

An extensometer is a strain gauge used to measure the deformation of a specimen, or strain measurement. Strain measurement of tensile testing is required by almost every standard, e.g., ASTM and ISO.

SPECIMEN GRIPS

Specimen grips are the mechanical connection between the specimen and the tensile testing machine. They function to transfer the motion of the crosshead to the specimen and transfer the test force developed in the specimen to the load cell.

ELECTRONICS

The electronics control the moving parts of the tensile testing machine. Load rate and crosshead speed can be controlled by a microprocessor in the servo controller (motor, controller, and feedback device).

SOFTWARE

Our test software is a very user-friendly, wizard-based Windows system that allows the user to set up the testing system, define and run tests, and display results.

DRIVE SYSTEM

The drive system is supplying the motor of the tensile testing machine with different levels of power and frequency, and indirectly controls the motor speed and torque.

 

Tensile Testing Procedure: Step-by-Step

Step 1: Prepare Specimen

The test specimen must be prepared in advance before conducting a tensile strength test. Once the mold is formed, the sample will have a dumbbell shape with a narrow width. This type of specimen, known as a tensile test specimen or dumbbell, is gripped at each end by a tensile testing machine. Tension is then applied until the specimen fails.

Step 2: Alter the testing environment

The tester must adjust the software settings before executing the test. It is done to ensure each test is executed with the appropriate settings according to the standards of the test. The setting also differs with the type of test to be executed, and also differs with the type of material.

Step 3: Selection of Test Standards

Test standards must be chosen suitably by the operator on the software before executing the test. Choosing test standards is of high value so that the output of the test is standard. Test standards also differ with the nature of the test to be executed, and also differ with the type of material.

Step 4: Clamp the specimen

Put the lower and upper clamps in their respective position so that there is space for the test sample length. Next, put the material between the tensile clamps. Clap the test piece first in the top clamp, then bring the lower clamp to the proper clamping position, and clamp the lower end of the test piece last.

Step 5: Start the Testing

To begin the tensile stress test, slowly separate the tensile clamps at a consistent rate. Depending on the shape and size of the material. The tensile testing would often take five minutes or less for the material to fracture.

Step 6: End of Experiment

Once the breakage has occurred, release the specimen piece from the tensile clamps. The tester should check the test record to confirm that the results obtained are correct and accurate. The tester should also ensure that the test equipment is clean following the test.

 

Presto Instruments: The Top Tensile Strength Tester Manufacturers in India

With today's quality manufacturing era, preserving material strength and longevity has never been so paramount. From the packaging industries to the automobile sector, accurate tensile strength testing is imperative to ensure non-failure and uphold safety measures. That is where Presto Instruments is, a brand name synonymous with innovation, accuracy, and reliability.

Being among the leading tensile strength tester manufacturers of India, Presto Instruments offers cutting-edge testing equipment that matches international quality standards. Supported by robust R&D infrastructure, user-friendly operation, and unmatched after-sales support, Presto keeps setting new benchmarks in material testing technology.

Presto Instruments is a leading tensile strength tester manufacturer in bangladesh, committed to global quality standards. Our equipment is designed to improve product reliability, reduce defects, and ensure consistent performance. Trusted by industries worldwide, we offer reliable and customized solutions to meet your testing needs. Contact us today.