Rifky Ismail, Deni Fajar Fitriyana, Mukhamad Alfian Habibi, Sugiyanto, A.P. Bayuseno
The below-knee prosthesis is a technology in the health field that serves as foot-replacement equipment for below-knee amputee whose main causes are diabetes, trauma, and severe injuries due to accidents. In general, the usage of the prosthetic leg is limited to the patient's walking activity and it cannot be used for sports activities such as running. The manufacturing industry of prosthetics foot in Indonesia has yet to produce prosthetic leg that can be used to run and instead it needs to be imported at a high price which makes it difficult for middle to lower class amputee. This research aims to design and develop a below-knee prosthesis designed specifically for running that is strong, lightweight, comfortable, flexible, and has affordable price compared to imported products. The product design method is used to determine the best prosthetic leg design on the shape geometry criteria and the prosthetic leg installation concept. This research uses 6 geometry shapes and 3 leg-installation concepts with models from Software Solidworks 2016. The finite element method is used to evaluate designs with a static load 8 times the user's body weight with a maximum weight of 80 kg. The simulated materials are carbon fiber composites which have tensile strength, Young's modulus and Poisson's ratio values of 538.83 MPa; 76975.71 MPa; and 0.14, respectively. The result showed that the geometry design with a thickness of 10 mm was the best design with a maximum von Mises stress value of 414.76 MPa and a safety factor value of 1.29. The highest value on the matrix of decision making matrices is 80 which is found on the prosthetic foot with the second concept with geometry design 3. © 2020 IEEE.
Diponegoro University, Center for Biomechanics Biomaterial, Biomechatronics and Biosignal Processing, Semarang, Indonesia; Universitas Negeri Semarang, Mechanical Engineering Dept., Semarang, Indonesia; Diponegoro University, Mechanical Engineering Dept., Semarang, Indonesia
