ISO 527-4, ISO 527-5, ASTM D3039, EN 2561

ASTM D3039 describes the standard method for tensile testing polymer matrix composites

It covers test methods for a wide range of specimen dimensions as different testing configurations. The specimens is generally prepared with tabbed ends that allowed for a secure grip on the specimen and ensured that breaks occurred within the gauge length and not in the jaw face.

These tests generally require an Environmental Chamber with range from -70° C (nitrogen liquid) to 350° C. Grips can be wedge types with Clip on Extensometer, or Video Extensometer. When testing far below or above ambient temperatures, polymer composites will often expand or contract, putting the specimen in tension or compression as the temperature changes. Labtest software allows you to set a load threshold that won't be exceeded until the test is started, for a specimen protection.

Additionally, the specimen alignment device is suggested to ensure optimal positioning of the specimen in the jaw faces, since offset loading can greatly effect tests results. Labtest software calculates E-modulus, maximum load, tensile strength, and strain at break. Poisson ratio measurement is available with dedicated Extensometers.