PSI - Issue 3

V. Crupi et al. / Procedia Structural Integrity 3 (2017) 424–431

427

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Author name / Structural Integrity Procedia 00 (2017) 000–000

moulded plates at orientation angle of 0°. Table 3 shows the dimensions of the specimen geometry; the values are elaborated by a statistical study on 15 specimens.

Fig. 1. Standard ISO 527-2:1993 specimen.

Table 3. Dimensions of the specimen.

a

b

c

d

e

f

R

h

[mm]

[mm]

[mm]

[mm]

[mm]

[mm]

[mm]

[mm]

AVG

30.61

30.54

169.45

9.86 0.02

19.84

3.93 0.01

25.00

83.48

D.St.

0.18

0.13

0.37

0.06

0.00

0.26

The static tests were carried out using a servo-hydraulic load machine at a crosshead rate equal to 5 mm/min with constant relative humidity and temperature. The tensile tests were carried out on 15 specimens using a hydraulic testing machine (ITALSIGMA) and the DIC technique (ARAMIS 3D 2M LT) was used to analyze the strain pattern of the specimen surface (Fig. 2a). Two cameras with a resolution of 1600 x 1200 pixel were used. Moreover, during tensile tests, an IR camera FLIR A40 was used (Fig. 2b).

(a)

(b)

Fig. 2. a. Strain pattern of the specimen surface. b. hydraulic testing machine.

The 15 specimens, investigated under fatigue loading, have the same geometry (Fig. 1) of those used for the static tests and are made from the same material by injection moulding as reported in Table 2. For fatigue tests, the