PSI - Issue 53

Venanzio Giannella et al. / Procedia Structural Integrity 53 (2024) 172–177 Raffaele Sepe / Structural Integrity Procedia 00 (2019) 000 – 000 are: 0 = 1.0343, 1 = −2.8098, 2 = 4.1335, 3 = −23.694, 4 = 76.371, 5 = − 83.25 . The crack lengths measured with crack gauge, were used to validate the data obtained from Eq. 1. The good agreement between the crack length measured with crack gauges and that calculated by Eq. 1 was obtained using in the Eq. 1 a values of Young’s modulus E =105 GPa A very good repeatability can be overall observed. Moreover, small variations among the three building directions can be noticed, even though the samples that were manufactured in-plane (green samples in Figure 2) demonstrated a slightly longer fatigue life. This small dependence of the fatigue life with reference to the building direction does not generally agree with many literature studies (Sepe et al., 2022; Alfieri et al. 2022). 175 4 / < 0.8

Fig. 3. Samples as coming from the manufacturing for 3 building directions.

{ = 0 + 1 + 2 2 + 3 3 + 4 4 + 5 5 = 1 (√ + 1) ⁄ = | / |

(1)

Fig. 4. Example of a fractured specimen.