PSI - Issue 37

Mohammed Zwawi et al. / Procedia Structural Integrity 37 (2022) 1057–1064 Mohammed Zwawi/ Structural Integrity Procedia 00 (2019) 000 – 000

1063

7

TK

1992 1485 1947 2546

4.1 3.8 4.2

4.59 3.94 4.13 6.32

11.90% 3.68% 1.67% 8.40%

3.56% 3.21% 3.29% 4.12%

12.72 17.38

AD

FS

7.04

AS

5.83

26.01

(a)

(b)

(c)

(d)

(e)

Figure 7: Reality vs. simulation crack initiation point for ( a) model “OR” , ( b) model “TK” , (c) model “AD” , (d) model “FS” , (e) model “AS” .

4. Conclusion This paper investigated the mechanical performance and load capacity of five models of eye grab hooks with different cross sections. The hooks were made of PLA material using an FDM technique. The eye grab hooks were tensile tested until failure to analyse the mechanical performance and loading limits for each eye grab hook model. The force vs. displacement curve of each model was plotted and analysed. An investigation of the influence of multiple 3D printing parameters will be investigated in future to improve the loading capacity and performance of PLA eye hooks. The following conclusions were drawn: 1- The original model “OR” had a maximum load capacity of 2.6 kN and weighed 50 grams. 2- Model “AS” showed superior performance, with a load capacity of 2.5 kN an d decreasing its weight to 42 grams (a 16% weight reduction). Hence, the cylindrical holes within model “AS” had a minimal effect on the loading capacity. 3- The remaining models “TK”, “AD”, and “FS” had lower load capacities of 2.0, 1.5, and 1.9 kN, respecti vely. 4- Model “AS” had the best results in terms of maximum displacement compared to the results for model “OR”. The remaining models demonstrated decreased displacements by more than 27% when compared to model “OR”. 5- Model “OR” had the maximum cost of USD$2. 00 for each eye grab hook. 6- The FEA predicted the crack initiation points of all fractured eye grab hook models highly effectively.

References

Algarni, M. (2021). The Influence of Raster Angle and Moisture Content on the Mechanical Properties of PLA Parts Produced by Fused Deposition Modeling. Polymers, 13(2), 237.