The test standard ISO 527-1 specifies methods for the uniaxial tensile test on plastics. This test is used to determine essential mechanical properties of a standardized specimens, including tensile stress, elongation, tensile modulus, yield point, breaking point and Poisson's ratio. These parameters are used to characterize the material.

The test specimens can be produced by injection molding or cut. Providing a constant clamping force, pneumatic grips are particularly suitable as specimen holders. At a constant strain rate, the specimen is moved in tensile direction until it breaks.
Due to the visco-elastic properties of many plastic materials, changing testing velocities will produce different mechanical properties. This must be taken into account when designing a component or plastic product.
The above-mentioned material characteristics can then be determined from the recorded resulting data. The use of external displacement measuring systems also allows a specific strain measurement of the relevant sample area.

The test requirements described in DIN 527-1 can be easily implemented with THELKIN's servo-static test systems. These offer the required measuring accuracy of 1% (class 1 or better). Test profiles, failure criteria and data acquisition can be defined easily and efficiently via the operating software:

• THELKIN Servo Static Load Frame SSL-M-100 - complies with all specifications of ISO 527-1 and allows easy and safe sample mounting, programming of the test as well as data acquisition and test execution.
• Vise Grip GR.VI.PN - fast and safe fixing of the specimen.

Other accessories, such as external extensometers or chambers for environmental simulation, complete the functionality of the basic system.