*3.2. Tensile Strength and Elasticity at Room Temperature*

Average pace of tensile loading was equal to 6 MPa/s. Digital cameras had simultaneously been taking photos from one or two perpendicular directions in set up periods of time.

After the test, photos were analysed in DIC software and, for each specimen, three virtual tensiometers with the length of approximately 100 mm were set on each specimen to calculate strains. Elasticity moduli were calculated as the directional coefficients in linear approximation of stress–strain relations.
