Tensile tests were performed with an INSTRON-1275 servohydraulic
machine, measuring the applied load by means of a load
cell INSTRON 2518-101-25 KN with a precision of ±0.125 kN. Displacements
were measured through an INSTRON EX-LON 06 longitudinal
extensometer, with a measuring range of 12.5 ± 2.5 mm.
The precision achieved by this extensometer was ±0.01 mm. The
load was applied through displacement control, at a constant rate
of 0.0015 mm/s