Emmanuelle Jacquet

Emmanuelle Jacquet
University of Franche-Comté | UFC · Institut FEMTO-ST

About

50
Publications
10,807
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366
Citations
Citations since 2016
17 Research Items
205 Citations
2016201720182019202020212022010203040
2016201720182019202020212022010203040
2016201720182019202020212022010203040
2016201720182019202020212022010203040

Publications

Publications (50)
Article
Full-text available
Acute exposure to hand-arm transmitted vibrations (HAVs) may decrease the wall shear stress (WSS) exerted by the blood flow on the arterial endothelium. In the case of chronic exposure to HAVs, these WSS changes can lead to arterial growth and remodeling potentially induced by an intimal hyperplasia phenomenon. Accordingly, we implemented an agent-...
Article
Full-text available
Prolonged exposure to strong hand-arm vibrations can lead to vascular disorders such as Vibration White Finger (VWF). We modeled the onset of this peripheral vascular disease in two steps. The first consists in assessing the reduction in shearing forces exerted by the blood on the walls of the arteries (Wall Shear Stress—WSS) during exposure to vib...
Article
Full-text available
Objectives To quantify and model normal foetal lung and liver elasticities between 24 and 39 weeks of gestation (WG) using two-dimensional shear wave elastography (2D-SWE). To assess the impact of the distance between the probe and the target organ on the estimation of elasticity values. Methods Measurements of normal foetal lungs and liver elasti...
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Full-text available
To characterize the anisotropic and viscoelastic behaviors of the skin, we conducted an experimental campaign of in-vivo suction tests using the CutiScan®CS100 device from Courage and Khazaka electronics. In this data paper, we present the raw acquired data of the tests and their respective treated data. The tests were performed 30 times on the ant...
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Full-text available
We introduce a finite-element-model-updating-based open-source framework to identify mechanical parameters of heterogeneous hyperelastic materials from in silico generated full-field data which can be downloaded here https://github.com/aflahelouneg/inverse_identification_soft_tissue. The numerical process consists in simulating an extensometer perf...
Article
Full-text available
The aim of this work is to characterize the mechanical parameters governing the in-plane behavior of human skin and, in particular, of a keloid-scar. We consider 2D hyperelastic bi-material model of a keloid and the surrounding healthy skin. The problem of finding the optimal model parameters that minimize the misfit between the model observations...
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Keloids are pathologic scars, defined as fibroproliferative diseases resulting from abnormal wound responses, which grow beyond the original wound margins. They develop on specific pro-keloid anatomic sites frequently characterized by high stress states. The initiation and growth mechanisms of keloid are not well-understood. This study relates mult...
Article
Le travail proposé concerne la prédiction de la réponse numérique d'une structure biomécanique sou-mise à un état de chargement externe inconnu. La méthodologie s'appuie sur la modélisation de structures homogènes puis hétérogènes, telles que des tissus cutanés sains ou pathologiques accessibles expé-rimentalement et soumis à des conditions aux lim...
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Full-text available
La peau humaine se comporte comme une membrane élastique précontrainte. La présence de sites anatomiques favorables à l'apparition de certaines tumeurs, une chéloïde dans notre cas, alors que d'autres en sont systématiquement dépourvus atteste de l'importance de l'environnement mécanique du tissu. Par conséquent, une caractérisation de la peau avec...
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Full-text available
Background/purpose: The mechanical properties and behavior of the human skin in vivo are of medical importance, particularly to surgeons who have to consider the skin extension capabilities in the preparation of surgical acts. Variable data can be found in literature that result from diverse kinds of tests (in vivo, ex vivo, and postmortem) perfor...
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Background/purpose: This paper aims to present an ultra-light extensometer device dedicated to the mechanical characterization of the human skin in vivo. Methods: The device developed was conceived to be non-invasive, to work without any stand and to perform various uniaxial tensile tests with either effort or displacement control. We also use s...
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The V-Y advancement flap is a usual technique for the closure of skin defects. A triangular flap is incised adjacent to a skin defect of rectangular shape. As the flap is advanced to close the initial defect, two smaller defects in the shape of a parallelogram are formed with respect to a reflection symmetry. The height of the defects depends on th...
Article
The V-Y advancement flap and, more recently, the keystone flap are commonly used to cover skin defects. Both flaps allow for primary closure after advancement by substituting the initial defect for a narrower defect distributed over a greater length. The first objective of this study was to develop a geometrical analysis of the V-Y advancement flap...
Article
Full-text available
After performing a V-Y advancement flap, we observed an unusually shaped necrosis, resembling a keyhole at the apex of the flap. As high closing tensions are an accepted cause of skin necrosis, we developed a mathematical model based on the finite element analysis in order to determine the stress field by simulating the mechanical behavior of human...
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Full-text available
There is a lack of information regarding the forces required for suturing human wounds. The knowledge of suturing forces serves as complementary information for setting up the limiting geometry when using tissue adhesives and it might also be used in robot-assisted surgery. The main purpose of this paper was to evaluate the forces required for sutu...
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Different models of reconstructed skin are available, either to provide skin wound healing when this process is deficient, or to be used as an in vitro model. Nevertheless, few studies have focused on the mechanical properties of skin equivalent. Indeed, human skin is naturally under tension. Taking into account these features, the purpose of this...
Article
Knowing biomechanical properties of human skin is important for clinical decision making as well as clinical intervention. Measuring these properties in vivo is essential. However, existing devices don't respect the fact, that human skin is an anisotropic material. Nowadays devices investigate mostly the human skin anisotropy by uniaxial testing. T...
Article
La rupture peropératoire d’une membrane de collagène est une source potentielle de complications et de perte d’efficacité. Le but de notre travail était de déterminer expérimentalement les propriétés mécaniques (module de Young, courbe force/déformation, allongement à la rupture) de trois membranes de collagène utilisées en régénération osseuse gui...
Article
The peroperative rupture of a collagen membrane is a potential cause of complications and loss of effectiveness. The purpose of our study was to determine experimentally the mechanical properties (Young modulus, stress-strain curve, tensile strength) of three collagen membranes used in guided bone regeneration. These properties and isotropy were co...
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La modélisation du comportement non linéaire anisotrope et fortement dépendant du temps de la peau humaine nécessite la connaissance de l’état fonctionnel du tissu pour l’identification du comportement. Il s’agit de déterminer le champ de contraintes de tension dans la peau à partir de prélèvements cutanés. l’évolution de la forme des zones libérée...
Article
The precise determination of skin's mechanical properties is still an open question. When performing an in vivo test, the piece of skin tested is not as well defined as it is in material testing. Moreover, the body zone and the body posture imply an initial stress on the skin. Consequently, a precise mechanical analysis needs a precise measurement...
Article
To obtain an unified treatment of the phase transformation materials pseudoelasticity, a model based on the two independent normal dissipative processes assumption has been developed, one for forward transformation and the other one for reverse transformation. Within the context of building a numerical tool for the optimal design of adaptive struct...
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Pour tenter d'améliorer les techniques d'ostéosynthèse, afin de réduire les fractures du fémur, apparaît la nécessité de développer un modèle géométrique et numérique capable de caractériser le comportement mécanique du fémur humain. La présente étude propose des résultats expérimentaux issus de tests de compression sur fémurs frais équipés de jaug...
Article
We consider a boundary value problem in a composite medium formed by three materials distributed periodically in a domain Ω(ε-periodic), , n⩾2, ε<1. Suppose that two of the materials have elastic behavior with stiffness of the same order of magnitude whereas the third one is viscoelastic and has a small stiffness (order εr, r⩾0). This latter is loc...
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A problem commonly encountered in plastic and reconstructive surgery is the prediction of the stress put on the skin when various types of skin flaps are used. We developed a mathematical model based on the finite element method, in order to determine the stress field, by simulating the mechanical behaviour of human skin during wound closure. We ch...
Article
Consider a boundary value problem in an elastic composite medium formed by three elastic materials distributed periodically in a domain Ω∗. After the reduction to a non-dimensional boundary value problem it ensues a ε-periodic media in the domain . Suppose that two of the materials have rigidities of the same order of magnitude whereas the third on...
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Full-text available
The possibilities provided by the rule of mixtures are well-known as regards the calculation of the longitudinal modulus and the Poisson's ratio of a unidirectional composite material. Its limits for determining the transverse and shear moduli are also known. The aim of this study is to demonstrate that the transverse and isotropic moduli of an agg...

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