Mechanical Modeling of The Leg Assembly Acting on the The Ankle: a CFD Analysis Study for Stress and Strain Measurement the a

This the of the probability of adaptation the A 3D leg assembly model is constructed by and the boundary conditions and respecting the specific characteristics of the providing a realistic and efficient structural analysis. This study describes a 3D construction process for the ankle in leg assembly as well as the generation of the mesh


Mini Review
Imaging techniques are considered useful approaches for nondestructively describing synthetic or natural biomaterials [1].
The mechanisms of orthopedic prostheses and the local CFD flow phenomena are still ambiguous for the experts. In particular, the distribution of flow in the prosthesis system of patients with bone diseases is a challenge to understand. For decades, the intrinsic movement of the foot and ankle complex during walking activity has been hindered by simplified foot modeling as a single functional segment [2]. The issue has partially remedied for the development of three-dimensional (3D) multi-assembly foot models [3].
Therefore, these 3D models of established lower limbs have proven their clinical impact by detecting impairments in foot mobility. In a more specific way, the biomechanics of the foot and ankle was analyzed via the kinematics of the walking cycle treated in different fields such as invasive bone pins, biplanar video radiography [4], studies of non-invasive surface markers [5,6]. As well as study of foot kinematics using a dynamic walking cadaver model, and plantar strain measurements [7][8][9][10][11]. Improvements in imaging techniques combined with advanced simulation methods, such as CFD, can provide better understanding as well as meaningful analysis measures for our leg assembly case and in a more specific method to perform the strain and stress at the ankle joint.

Material and Methods
A 3D model was produced for the leg assembly with 0,5 m of length and steel material composed of 738 faces 13 volumes, 1259 nodes, 1955 edges. A Tet-Dominant algorithm was run for fast generation and automated tetrahedral meshes as described in [12]. The linear elastic behavior has been described with the initial  Table 1.

Result
The ankle prosthesis was tested under three axes of translation in the nodal directions x, y and z and rotations around the nodal

ARTICLE INFO Abstract
The increasing incidence of fractures or bone accidents for aged or injured patients is seen as a challenge for experts. Following our study of an accidental case wearing a prosthetic leg, the risk of poor adaptation to the ankle following the change in biomechanics was described. This study aims to analyze the evolution of the proximal biomechanics of this leg assembly using dynamic calculation fluid analysis (CFD) and to extract parameters such as deformation and stress measurements which could predict the probability of well adaptation inside the ankle and simulate the measurement of strain and stress. A 3D leg assembly model is constructed by configuring the material and the boundary conditions and respecting the specific characteristics of the patient, providing a realistic and efficient structural analysis. This study describes a 3D construction process for the ankle in leg assembly as well as the generation of the mesh on the basis of a parallel processing of 16 processors turned in the cloud.

Discussion
Recently, the biomechanics of the foot and ankle have been  Special thanks to the medical staff for providing us with as access to the archive of patients and the administrative framework for the warm welcome in their team.

Conflicts of Interest
No conflict to declare.