Finite element analysis of the CFRP-based 3D printed ankle-foot orthosis

Ali, Md. Hazrat; Smagulov, Zhalgas; Otepbergenov, Temirlan

doi:10.1016/j.procs.2020.12.008

Cited by 29 publications

(14 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The FDM method uses, among others, PLA, ABS, ASA, FLEX, HIPS, NYLON (PA6, PA12), and PET-G. The list of materials with their properties is presented in the table below [4,7,18]. The material of the orthosis has a great influence on its mechanical properties.…”

Section: Manufacturing Of Afo Orthoses With the Additive Methodsmentioning

confidence: 99%

“…In the past, the AFOs were usually made of pure leather and wood. Currently, owing to the development of manufacturing techniques and the development of material engineering, products such as orthoses are of increasingly better quality, have better parameters and are and user-oriented [4]. After analyzing the literature, it was found that there are two ways to manufacture AFOs, namely:…”

Section: Introductionmentioning

confidence: 99%

“…• manufacturing technology using impressions or moulage, and then thermoplastic polymer materials (traditional method) [4,6,7], • additive-manufacturing, i.e., 3D printing [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Application of the finite element method to the design of an ankle orthosis

Stefańczak

Gajewski

Rogala

2021

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

AFO (Ankle-Foot Orthosis), which covers the ankle and foot, protects and supports the ankle joint as well as the structures around it. It contributes to the maintenance of the correct gait cycle. Owing to orthoses, the functional capacity of the body part is significantly improved, and so is the quality of life for the user. Personalized orthoses, which are adapted to the anatomy of the user, are more and more often produced by the additive methods. The use of 3D printing for the manufacturing medical devices is becoming increasingly common due to the low cost of the whole process, short production time and the possibility of the product personalization. One of the stages in manufacturing AFOs with the additive method is to create a three-dimensional model of the orthosis in CAD software. Finite element analysis was performed to assess the mechanical properties of the orthosis. The influence of geometry and the materials used were investigated with FEM analysis software. As a result of structural analysis during the design stage, the assessment of the medical device in terms of its durability and mechanical resistance without putting the user at risk is possible. On the basis of the obtained results, the structure strength was compared.

show abstract

Section: Manufacturing Of Afo Orthoses With the Additive Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Application of the finite element method to the design of an ankle orthosis

Stefańczak

Gajewski

Rogala

2021

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

“…Shahar et al (2019) showed the high potential of anisotropic materials for energy storage tasks for orthoses. Ali et al (2021) described a similar approach to design AFO based on 3D printed CFRP structures. The use of anisotropic nonlinear materials further increases the computational time to solve the displacement ordinary differential equation (ODE), since the nonlinear effects must also be approximated.…”

Section: Introductionmentioning

confidence: 99%

A New Design Method for Generating Surrogate Kinematic Truss Orthoses to Support Pathological Gait Patterns in Human Model Simulations

et al. 2023

View full text Add to dashboard Cite

With increasing life expectancy, the risk of diseases of the central nervous system, such as cancer, strokes, etc., also increases. Strokes often result in injury to the sciatic nerve, which is responsible for controlling the calf muscles (plantar and dorsal flexors). A so-called ankle joint orthosis (AFO) helps to support the pathological gait and to avoid foot drop during gait. Passive orthoses are of particular importance for research, as they do not require additional incoming energy from outside to the orthotic system. However, current passive orthoses are often not personalized. On the one hand, because they usually have only a temporary muscle-building function and, on the other hand, because the individual design process is computationally time consuming and thus expensive. This paper presents a possibility to pre-dimension and pre-design passive orthoses fast and cost-efficiently by reducing the complexity of the model based on volume-optimized truss elements. Therefor a traditional high calculation intensive design procedure is compared with the complexity reduced model to show its effectiviness and the similarity of the results.

show abstract

“…Simulations were performed with material properties from various polymers using FreeCAD 0.19.4 software and analyzed according to the stress required for orthosis use. The FEM has been increasingly applied in biomechanical research (Driscoll, 2019;Ali, et al, 2021;Tiwari, et al, 2022), such as studying the biomechanical behavior of biological structures. Preventive medicine is another field that has been using various FEM resources for applications such as medical visualization, data monitoring to build a model of a part of the anatomy and physiology of an individual, and manufacturing of prostheses (Fish & Belytschko, 2009).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of polymers for upper limb orthosis through computer simulation

Oliveira

et al. 2022

RSD

View full text Add to dashboard Cite

Material selection is one of the most relevant and challenging steps in engineering projects. In this study, we focused on selecting polymers with low density and stiffness for upper limb orthoses that help in the recovery of patients who have undergone cerebrovascular accident (CVA). CES EduPack 2011 software was used to compare the density and Young's modulus of different polymers. The merit index aided in the classification of these materials, which were applied to 3D orthosis models for computer simulations in FreeCAD 0.19.4 software. Using the simulation data, a decision matrix was developed using the Pahl & Beitz method to classify polymers according to the weighted property index. The decision matrix using the simulated and merit index data indicated polyethylene terephthalate (PET) and polylactic acid (PLA) as the best polymers for upper limb orthoses. The weighted property index values were 127.34 and 123.19, respectively. It is noteworthy that polyethylene terephthalate glycol (PETG - adaptation of PET) is an alternative to 3D printing filaments, and PLA is one of the main filaments.

show abstract

Finite element analysis of the CFRP-based 3D printed ankle-foot orthosis

Cited by 29 publications

References 11 publications

Application of the finite element method to the design of an ankle orthosis

Application of the finite element method to the design of an ankle orthosis

A New Design Method for Generating Surrogate Kinematic Truss Orthoses to Support Pathological Gait Patterns in Human Model Simulations

Evaluation of polymers for upper limb orthosis through computer simulation

Contact Info

Product

Resources

About