Suares, Reza Mardiansah (2025) Analisis Struktur Telapak Kaki Prostetik Tipe Energy Storing And Return (ESAR) Menggunakan Finite Element Analysis Berdasarkan Standar ISO 10328. Undergraduate thesis, UPN Veteran Jawa Timur.
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Abstract
The application of Energy Storing and Return (ESAR) prosthetic leg technology in developing countries is often hampered by the high cost of materials. On the other hand, studies on cost-effective core materials such as Nylon and UHMWPE as economical yet functional alternatives are still rare in the context of Indonesia's demographics. This study presents new insights through the analyze of alternative core materials, namely Aluminum 7075, Nylon, and UHMWPE, using a simulation approach with the Finite Element Analysis (FEA) method that combines the ISO 10328 static loading standard with experimental Ground Reaction Force (GRF) data from local subjects. Simulations were conducted on three main walking phases: heel strike, midstance, and toe off. The parameters analyzed included total deformation, Von Mises stress, safety factor, and energy efficiency. The simulation results showed that although Aluminum 7075 had the highest strength, Nylon was the most optimal material in terms of ESAR functional performance. Nylon recorded a peak Von Mises stress of 23.220 MPa with a safety factor of 3.455. Nylon material showed optimal elastic recovery in the unloading phase, with permanent deformation remaining at only 0.123 mm, well below the ISO 10328 tolerance limit (1 mm). Nylon shows the highest energy efficiency in the crucial midstance (81.139%) and toe-off (70.945%) phases for propulsion force. Energy efficiency is calculated based on the ratio of the area of the force-displacement curve in the unloading phase (returned energy) to the loading phase (stored energy). The analysis also identified the ankle joint cavity as a critical point of stress concentration. In conclusion, Nylon proved to be the best core material because it offers a balance between structural safety, cost efficiency, and energy return capability. Keywords: ESAR Prosthetic, Finite Element Method, ISO 10328, Nylon, Energy Efficiency.
| Item Type: | Thesis (Undergraduate) | ||||||||
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| Subjects: | T Technology > TJ Mechanical engineering and machinery | ||||||||
| Divisions: | Faculty of Engineering > Departement of Mechanical Engineering | ||||||||
| Depositing User: | Reza mardiansah suares | ||||||||
| Date Deposited: | 22 Dec 2025 04:04 | ||||||||
| Last Modified: | 22 Dec 2025 05:03 | ||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/48148 |
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