| Title: | Numerical analysis of a transtibial prosthesis socket using 3D-Printed Bio-Based PLA |
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| Authors: | ID Plesec, Vasja (Author)
ID Humar, Jani (Author)
ID Dobnik-Dubrovski, Polona (Author)
ID Harih, Gregor (Author) |
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| Files: |  Plesec-2023-Numerical_Analysis_of_a_Transtibia.pdf (5,99 MB)
MD5: F40E361A7212E6AF0DB8E30E86DD1E9E
 https://doi.org/10.3390/ma16051985
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| Language: | English |
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| Work type: | Article |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | FS - Faculty of Mechanical Engineering
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| Abstract: | Lower-limb prosthesis design and manufacturing still rely mostly on the workshop process of trial-and-error using expensive unrecyclable composite materials, resulting in time-consuming, material-wasting, and, ultimately, expensive prostheses. Therefore, we investigated the possibility of utilizing Fused Deposition Modeling 3D-printing technology with inexpensive bio-based and bio-degradable Polylactic Acid (PLA) material for prosthesis socket development and manufacturing. The safety and stability of the proposed 3D-printed PLA socket were analyzed using a recently developed generic transtibial numeric model, with boundary conditions of donning and newly developed realistic gait cycle phases of a heel strike and forefoot loading according to ISO 10328. The material properties of the 3D-printed PLA were determined using uniaxial tensile and compression tests on transverse and longitudinal samples. Numerical simulations with all boundary conditions were performed for the 3D-printed PLA and traditional polystyrene check and definitive composite socket. The results showed that the 3D-printed PLA socket withstands the occurring von-Mises stresses of 5.4 MPa and 10.8 MPa under heel strike and push-off gait conditions, respectively. Furthermore, the maximum deformations observed in the 3D-printed PLA socket of 0.74 mm and 2.66 mm were similar to the check socket deformations of 0.67 mm and 2.52 mm during heel strike and push-off, respectively, hence providing the same stability for the amputees. We have shown that an inexpensive, bio-based, and bio-degradable PLA material can be considered for manufacturing the lower-limb prosthesis, resulting in an environmentally friendly and inexpensive solution. |
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| Keywords: | 3D printing, bio-based, polylactic acid, PLA, prosthesis, prosthesis socket, numerical model, finite element method |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Submitted for review: | 25.01.2023 |
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| Article acceptance date: | 24.02.2023 |
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| Publication date: | 28.02.2023 |
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| Publisher: | MDPI |
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| Year of publishing: | 2023 |
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| Number of pages: | Str. 1-17 |
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| Numbering: | Letn. 16, Št. 5, št. članka 1985 |
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| PID: | 20.500.12556/DKUM-87382  |
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| UDC: | 331.1:519.6 |
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| ISSN on article: | 1996-1944 |
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| COBISS.SI-ID: | 144563203 |
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| DOI: | 10.3390/ma16051985 |
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| Publication date in DKUM: | 14.03.2024 |
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| Views: | 450 |
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| Downloads: | 63 |
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| Metadata: |    |
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| Categories: | Misc.
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