Conferencia: "Structural modeling of biosolids under finite strains: from micro to macro scales"

Fecha: Lunes, 24 de junio de 2013
Lugar: Seminario I, 4ª planta , E.T.S Ing. Caminos, C. y P., Campus de Fuentenueva
Horario: 12:30h
Descripción:
Conferenciante: Professor Gerhard A. Holzapfel Graz University of Technology, Austria, Royal Institute of Technology, Sweden.
- Resumen: In this talk we illustrate the importance of considering the detailed structure of biosolid in a material model. We focus on the micro-structure of arterial walls in health and disease, of the myocardium and of densely cross-linked actin networks which exist mainly in the cortical region of the cell. It is shown how the aterial structure can be quantified by polarized light microscopy or second-harmonic generation which is a nonlinear optical process with very high axial and lateral resolutions to identify, e.g., the collagen structure of the material. Important is the quantification of the structure for the use in material models since otherwise the stresses predicted by using numerical tools might not reflect the ‘true’ in vivo conditions.
  Note that changes in the structural components play an important role in the pathogenesis of the tissue degeneration, e.g., in aneurysmal development. We particularly show how such experimental information can be used within constitutive models. To demonstrate the efficacy of structural models we analyze a sample of collagenous myocardial tissue and focus on the significant changes of the mechanical response by altering the tissue structure. Finally, a multiscale ormulation for the description of the viscoelastic properties of in vitro actin networks, by including the micro-structure, is discussed. In a first step the single filament esponse of F-actin is captured by a worm-like chain model including the extensibility of the ilament, while in a second step the 3D biopolymer network is analyzed by using the microsphere model which accounts for the filaments equally distributed in space. A finite-element simulation of the aspiration of a droplet in a micropipette allows for further insights of the mechanical behavior of actin networks.
Organiza: Máster de Estructuras y los Seminarios Interuniversitarios de Mecánica y Materiales
Más información: http://masteres.ugr.es/iestructuras/
https://w3.mecanica.upm.es/seminarios/
Inas H. Faris
Dpto. Mecánica de Estructuras e Ingeniería Hidráulica.
E.T.S de Ingeniería de Caminos, C. y P.
Universidad de Granada
Edificio Politécnico, Avda. Fuentenueva s/n.
18071 – Granada (SPAIN)
Tlfno: (+34)958 24 94 31 Fax: (+34)958 24 99 59
e-mail: inas@ugr.es

Conferencia: «Structural modeling of biosolids under finite strains: from micro to macro scales»

24 junio 2013 | 10:30 - 11:30 h

Actividades culturales y de divulgación
Conferencias, seminarios, divulgación científica

Fechas y horarios

Conferencia: «Structural modeling of biosolids under finite strains: from micro to macro scales»

24 junio 2013 | 10:30 - 11:30 h

Actividades culturales y de divulgaciónConferencias, seminarios, divulgación científica

Fechas y horarios

Actividades culturales y de divulgación
Conferencias, seminarios, divulgación científica