Testing Instruments for Tensile Properties of Fibers and Fabric

Methods of Tensile Testing of Textiles

I.    Constant Rate of Elongation (CRE)

Constant rate of elongation tests are tests used to determine the strength of textile materials. In constant rate of elongation tests, the specimen is extended at a constant rate and the force is a dependent quantity.
It is possible in constant rate of elongation tests for load to decrease while elongation increases.

II.    Constant Rate of Loading (CRL)

Constant rate of loading tests are tests used to determine the strength of textile materials. In constant rate of loading (CRL) tests, the specimen is loaded at a constant rate and the elongation is a dependent quantity.
It is not possible in constant rate of loading tests for load to decrease. Load must increase all the time.