PSI - Issue 47

Sergio Arrieta et al. / Procedia Structural Integrity 47 (2023) 13–21 Author name / Structural Integrity Procedia 00 (2019) 000–000

20 8

1.8

PLA ASED - Calibrated (ν= 0 .3)

1.6

1.4

ρ=0.9 mm; a/W=0.5; B=5 mm ρ=0.9 mm; a/W=0.5; B=10 mm ρ=0.9 mm; a/W=0.25; B=5 mm ρ=0.9 mm; a/W=0.25; B=10 mm ρ=0.9 mm; a/W=0.25; B=20 mm ρ=1.3 mm; a/W=0.5; B=5 mm ρ=1.3 mm; a/W=0.5; B=10 mm ρ=1.3 mm; a/W=0.25; B=5 mm ρ=1.3 mm; a/W=0.25; B=10 mm

1.2

1.0

P ASED /P EXP

0.8

0.6

0.4

0.2

0.0

0.50

0.75

1.00

1.25

1.50

ρ (mm)

Fig. 5. Comparison between experimental results and ASED estimations.

4. Conclusions

In this work, the Average Strain Energy Density (ASED) criterion, a has been applied to evaluate fracture loads in 3D printed PLA plates containing U-notches and subjected to tensile loads. Given that the material is not fully brittle, the ASED criterion has required a previous calibration process based on experimental fracture loads obtained in SENB specimens containing two different notch radii. The validation has been performed on one single raster orientation (45/-45), observing that the proposed approach has provided conservative safe estimation of critical loads in all cases, with P ASED /P exp ratios ranging between 0.5 and 0.75.

Acknowledgements

This publication is part of the project “Comportamiento en fractura y efecto entalla en compuestos de matriz termoplástica obtenidos por fabricación aditiva, PID2021-122324NB-I00” funded by MCIN/ AEI /10.13039/501100011033/FEDER “Una manera de hacer Europa”.

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