Tensile properties & tear strength, trouser specimen to ISO 1798
ASTM D3574-E, ISO 8067, ASTM D3574-F and factory regulations
Tensile tests are used to determine various tensile properties on a particular specimen under defined environmental conditions. In addition to recording a stress-strain diagram, the focus is on determining the tensile strength and strain at break values.
The method is used to compare materials and for quality control purposes.
Tensile properties Standards for tensile properties Tear strength Standards for tear strength Testing systems Plastics brochure
Tensile properties
- The specimens for these tests are normally taken from finished parts or a sheet. ZwickRoell offers sheet cutting presses with standardized blades. It is important that the blades are equipped with an ejector to avoid the risk of operator injury during specimen removal.
- The cross-section of the specimen must be determined before the test. The width of the specimen is normally adopted from the dimensions of the cutting die, while the thickness is measured using a defined surface pressing, for example, to ISO 1923. ZwickRoell offers special measuring instruments for this.
- A variety of pneumatic or mechanical specimen grips can be used to grip the specimen. The specimen must be gripped in such a way that it is held securely in the shoulder area and no specimen fractures occur near the gripping point. ZwickRoell's testing lab is available to help you select the right specimen and jaw inserts.
- To measure strain at break, ZwickRoell offers mechanical and optical extensometers, which record the extension of the specimen in a specified gauge length range. The function of these extensometers is largely automatic. When using a mechanical extensometer, you must ensure that the weight and frictional forces of the extensometer remain low in comparison to the measured forces. If optical extensometers are used, it is important that the specimen is not damaged during the marking process.
