This method is mainly applicable to woven textile fabrics. It can be applicable to fabrics produced by other techniques. It is not normally applicable to woven elastic fabrics, geotextiles, nonwovens, coated fabrics, textile-glass woven fabrics, and fabrics made from carbon fibres or polyolefin tape yarns.This method specifies a procedure to determine the maximum force and elongation at maximum force of textile fabrics using a strip method in equilibrium with the standard atmosphere for testing, and of test specimens in the wet state.
In principle there are two sets of test specimen (quantity 5 per set): one in the warp direction and the other in the weft direction of the material. These are individually supported as defined in the standard by clamping of the specimen, slack mounting. The application is to pull to the pretensioning force, then the test is started at a continuous increasing extension (constant rate of Extension) applying a force longitudinally to a test piece of a specified length and width until the specimen fails. The results determination is from the pretensioning point for the maximum and breaking strength and elongation from the recorded force-elongation curve. For this test it is important to have a test data sampling rate to the PC for analysis as high as 100 Hz to ensure the capture a high number of data points.
We use screw action grips, pneumatic action grips with rubber coated jaw faces for clamping of the material fitted to a tensile testing machine. While manual action grips will work, many of our users prefer the pneumatic action grips for ease of use, productivity, and better repeatability. Pneumatic action grips allow you to set a clamping pressure, while the manually operated grips depend on the operator's strength (which may not be so repeatable). We find that gripping pressure and specimen alignment are very important in these tests. Too much gripping pressure can produce premature breaks, while not enough gripping pressure can lead to specimen slippage or breaks at or near the jaws. We also suggest to choose faces that are at least 10 mm wider than the specimen being tested, and at least 25 mm if not more in height.
The testing machine is usually of a
single-column or dual-column tabletop design. Testing software, such as Bluehill® 2, is used to input specimen details, set the desired test control, automatically calculate the desired results and statistics, and produce a test report all in accordance with the standard. For this test type, we use the preload feature of Bluehill software to eliminate any slack in the specimen when loading into the clamping grips prior to test.
We suggest reviewing ISO13934-1 to fully understand the test fixture and results requirements prior to performing any tests.