How does a tensile test machine work

To determine the maximum force required to rupture break a woven fabric. This machine is also used for Bra hook and Bra Rings. The centre part of the test specimen is held by grips of a specific dimension and extended at a constant rate until it ruptures breaks.

The force at which this occurs is then recorded. Nb: a 2. A blank dyeing is prepared in the presence of uv-screening agents. The improvement in extensibility and Tensile strength tester is determined following exposure to light fakra 3x. Description: Tensile strength and elongation are the two prime characteristics of most of the raw materials, whether they are metals, or non metals such as foam, rubber, leather, textiles, plastic, paper or finished products such as rods, ropes, yarns, belts etc.

This two properties often play amajor role in determining the suitability of any raw materials for specified application. It is therefore, of utmost importance to determine these characteristics accuratel. Note : the un seamed sample from Tensile test method 4. Carry out the test in this atmosphere. All tests should also be carried out in this atmosphere. Note : any break which occurs within 5mm of the clamping line of the grips should be reported as a grip break.

If the grip break falls below the lowest normal break results then it should be disregarded and further samples tested. If it falls above the lowest normal break result, then it can be included. This test procedure creates tension on the sample which leads to sample failure or fracture. This reading is then recorded by the user to measure the maximum tensile strength of the product. The testing machine provides accurate and reliable test results that are required to produce only best quality of products.

Call Now. Purpose of Measuring Tensile Strength The tensile testing machine is highly recommended to evaluate the tension strength of the products. Standard Working Procedure of Tensile Testing Machine To operate the testing machine efficiently, first of all, take a piece of rubber specimen which you want to test. Presto Admin. Leave a Comment.

Most Tensile Testers can perform bend, crush, peel, puncture, shear, and tension procedures once they are outfitted with the correct fixture configuration. The size of the machine and the grips must be increased for higher force testing. Bend Fixtures are used for conducting 3 pt. There are two pieces to a bend test fixture. First, the top fin which is used to push down onto the center of the sample. The sample rests on the bottom piece of the fixture which has two supports which make up the span distance.

The bottom support spans can be outfitted with different sized contact radii according to the exact ASTM procedure and characteristics of the sample material. The top piece and bottom piece of a 4 pt. Other, more exotic bend fixtures can be used on a tensile tester including bending jigs with articulating rollers and serpentine style 4 pt. Crush or compression tests are performed with platens.

The platens are a pair of flat metal plates which are brought down to squish the sample. Platens are pretty straight forward and can be either circular or square. A compression platen with a spherically seated universal joint can be used to perfectly align the sample.

Only one spherically seated platen is required in this setup. Some compression platens, such as those for testing foam, have holes drilled in them to allow for the air to properly escape.

Peel tests are performed at fixed angles in order to determine the strength of the adhesive on the tape. Special peel testing fixtures can be fabricated which allow the user to adjust the angle of the peel test on the fly.

Along with the angled peel fixtures, there are also other peel grips such as the floating roller peel fixture and the climbing drum peel fixture. Puncture fixtures are used to perform procedures where a hole is poked into a typically square specimen. Puncture fixtures can come in all shapes and sizes and are usually specifically designed for certain standardized tests.

Two pieces make up a puncture fixture including the top puncture plunger and the bottom base fixture. Certain puncture fixtures do not fit into a single column testing machine because there is not enough throat depth between the center alignment and the back of the machine column.

Shear test fixtures are similar to puncture fixtures in that they are almost always specifically designed according to the test standard. For instance, the rail shear fixture and the Iosipescu shear test fixture performs essentially the same function on the sample, however there are some minor but intricate differences. Basic shear tests for adhesives can be performed with standard tensile grips.

There are many different types of tensile tester grips because pull testing is by far the most popular type of material testing procedure. Certain grips work better in different situations and the topic is too numerous to discuss in this article. The Universal Grip Company has one of the most extensive websites for detailing and explaining different types of tensile grips and fixtures.