PSI - Issue 47

G. Morettini et al. / Procedia Structural Integrity 47 (2023) 296–309 Author name / Structural Integrity Procedia 00 (2019) 000–000

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8

Standard specimens Six dog-bone specimens were made to perform standard PLA tensile tests. Type I specimens were chosen according to the reference standard, whose geometric properties are described in Fig.5

Fig. 5. ASTM standard dog-bone specimens to perform tensile test.

Notch specimens The notched specimens, shown in Fig.6 were made by varying the thickness and the fillet radius of the notch, while keeping the opening angle 2 �� 90° constant. In this way, 9 different sets of specimens were created. The geometric parameters were varied as shown in Table1.

Fig. 6. Notch specimen with geometrical references.

The diversification of the geometries will allow us to evaluate the influence of different types of notches on the strength of the specimens and the ability of the method to predict their failure. For all samples, after removing the edges, the angles and the surfaces were smoothed with fine sandpaper (in accordance with ASTM D638). After this procedure, all surfaces were defect-free, and the specimens were ready for testing procedures.

Table 2. Values of geometric parameters variated.

Set id

1

2

3

4

5

6

7

8

9

H [mm] 15 [mm] 0,5 2 4 0,5 2 4 0,5 2 4 10 10 10 13 13 13 15 15