The Behavior of the Virtual Human Head-Neck System during the Main Movements

Ciunel, Stefanita; Duță, Alina; Popa, Dragoș Laurențiu; Popa-Mitroi, Gheorghe; Dumitru, Violeta Cristina

doi:10.4028/www.scientific.net/amm.657.780

Cited by 5 publications

(4 citation statements)

References 2 publications

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“…In this module, a new library was defined, which contains the data contained in Table 1 . To determine these values, a selective bibliography was analysed [ 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 ].…”

Section: Resultsmentioning

confidence: 99%

“…The materials shown in Table 2 [ 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 ] were defined and activated in the engineering data module.…”

Section: Resultsmentioning

confidence: 99%

“…The required materials were defined or loaded in the engineering data module. These are listed in Table 3 [ 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 ].…”

Section: Resultsmentioning

confidence: 99%

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An Experimental and Virtual Approach to Hip Revision Prostheses

et al. 2022

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(1) Introduction: The changes in the joint morphology inevitably lead to prosthesis, but the hip pathology is complex. The hip arthroplasty is a therapeutic solution and can be caused, most frequently, by primary and secondary coxarthrosis due to or followed by traumatic conditions. The main aim of this study was to find the method of revision hip prosthesis that preserves as much bone material as possible and has sufficiently good mechanical strength. (2) Materials and Methods: In this study, in a first step, the two revision prostheses were performed on bone components taken from an animal (cow), and then, they were tested on a mechanical testing machine until the prostheses physically failed, and the force causing their failure was determined. (3) Results: These prostheses were then modelled in a virtual environment and tested using the finite element method (FEM) in order to determine their behaviour under loading from normal human gait. Displacement, strain, and stress maps were obtained. (4) Discussion: Discussions on hip revision prostheses, method, and theory analysis are presented at the end of the paper. (5) Conclusions: Important conclusions are drawn based on comparative analyses. The main conclusion shows that the both orthopaedic prostheses provide a very good resistance.

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Section: Resultsmentioning

confidence: 99%

“…The materials shown in Table 2 [ 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 ] were defined and activated in the engineering data module.…”

Section: Resultsmentioning

confidence: 99%

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An Experimental and Virtual Approach to Hip Revision Prostheses

et al. 2022

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“…Virtual joints are considered active mechanical couples (motors) driven by motion laws obtained by the analysis of film images. Practically, data obtained in the joints have been transposed to control the mechanical couplings in the virtual environment [9,10].…”

Section: Reconstruction Of Human Normal Walking In the Motion Environmentioning

confidence: 99%

CAD, CAE and rapid prototyping methods applied in long bones orthopaedics

Popa¹,

Buciu²,

Călin³

et al. 2019

FME Transactions

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The paper presents some methods used to analyze human bone joints. First, there were defined the "hard" parts as the main bone components and "soft" parts as ligaments or menisci using CT images. These components are imported into a parameterized environment assembly module and a biomechanical model of human walking is being obtained, which is exported to a kinematic simulation environment and finite element analysis, where first the kinematic parameters are defined. With these defined parameters, the kinematic and dynamic simulation of the subsystems for classical, normal motion can be switched. Following the interpretation of the results, the initial parameters of the biomechanical subsystems may be modified. In the next phase, the components of the subsystems are divided successively and the finite element structure is obtained for the entire biomechanical system of the joints that participate in human locomotion.

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Simulations Using Finite Element Method Made on a Personalized Dental System

Vătu

Vintilă

Popa

et al. 2019

AEF

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The human skull and the maxillary bones have a very complicated architecture, determined by the outer walls, by the internal bone structures and their joining. In this paper CAD parametric software has been used to define complex virtual models. First, the mandible and jaw were defined using CT images. These images were imported into a CAD software using specific techniques and methods. These models have been finalized in SolidWorks where the virtual model of the studied system has been generated. Then, the virtual models were exported to a software for FEA simulation and prepared for every dentistry simulations. The structure of the maxillary bones contains spongy bone tissue, cortical bone tissue along with dental tissues. Each of these tissues have certain properties (elasticity, plasticity, density) assessed by flexibility. The analysis of the mechanical tension of the dental structures has been a subject of interest in recent years in order to determine the state of tension in the dental structures and to improve the mechanical strength of these structures. Such numerical techniques can give a better understanding of reactions and interactions of individual tissues. This involves a series of computational procedures to calculate stress in each element. Field variables can be interpolated by using form functions for scientific verification and validation of clinical assumptions. Various loadings have been applied to a personalized skull obtained from CT images using CAD techniques and procedures. On this system, FEM simulations were made and maps of stress, displacements and deformations were obtained that show the mechanical behavior of the maxillary dental system. Finally, important conclusions were highlighted.

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The Behavior of the Virtual Human Head-Neck System during the Main Movements

Cited by 5 publications

References 2 publications

An Experimental and Virtual Approach to Hip Revision Prostheses

An Experimental and Virtual Approach to Hip Revision Prostheses

CAD, CAE and rapid prototyping methods applied in long bones orthopaedics

Simulations Using Finite Element Method Made on a Personalized Dental System

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