PSI - Issue 49

Teiba Ahmed et al. / Procedia Structural Integrity 49 (2023) 37–42 Teiba Ahmed et al. / Structural Integrity Procedia 00 (2023) 000–000

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4. Conclusion In this study the stiffness of single-wall extrusion-3D-printed sinusoidal geometries where characterised through cantilever mechanical testing. It was found that straight specimens exhibited the highest stiffness and increasing the frequency (reducing the wavelength) reduced stiffness. Thicker specimens exhibited higher stiffness, as expected, but the method was successful across a range of printed thicknesses. Based on the results, this study shows the potential to identify design parameters for the desired stiffness for edges in orthotics. Acknowledgements The first author acknowledges facilities made available by Loughborough University. References Allum, J., Moetazedian, A., Gleadall, A., & Silberschmidt, V. V. (2020). Interlayer bonding has bulk-material strength in extrusion additive manufacturing: New understanding of anisotropy. Additive Manufacturing , 34 (April), 101297. https://doi.org/10.1016/j.addma.2020.101297 Gleadall, A. (2021). FullControl GCode Designer: Open-source software for unconstrained design in additive manufacturing. Additive Manufacturing , 46 , 1–25. https://doi.org/10.1016/j.addma.2021.102109 Moetazedian, A., Budisuharto, A. S., Silberschmidt, V. V., & Gleadall, A. (2021). CONVEX (CONtinuously Varied EXtrusion): A new scale of design for additive manufacturing. Additive Manufacturing , 37 , 0–31. https://doi.org/10.1016/j.addma.2020.101576 Ng, K. J., Duke, K., & Lou, E. (2019). Investigation of future 3D printed brace design parameters: evaluation of mechanical properties and prototype outcomes. Journal of 3D Printing in Medicine , 3 (4), 171–184. https://doi.org/10.2217/3DP-2019-0012 Xu, Y., Li, X., Chang, Y., Wang, Y., Che, L., Shi, G., Niu, X., Wang, H., Li, X., He, Y., Pei, B., & Wei, G. (2022). Design of Personalized Cervical Fixation Orthosis Based on 3D Printing Technology. Applied Bionics and Biomechanics , 2022 . https://doi.org/10.1155/2022/8243128