Search for dissertations about: "Gerhard A. Holzapfel"

Found 3 swedish dissertations containing the words Gerhard A. Holzapfel.

  2. 1. Arterial mechanics : noninvasive identification of constitutive parameters and residual stress

    Author : Jonas Stålhand; Gerhard A. Holzapfel; Linköpings universitet; []
    Keywords : TECHNOLOGY; TEKNIKVETENSKAP;

    Abstract : This thesis concerns the mechanical modelling of arteries, and particularly a method to identify parameters describing the mechanical properties using only clinically obtainable in vivo measurements. The artery is modelled as a fibre reinforced, incompressible, thick-walled cylinder subjected to large deformations and a residual stress field. READ MORE

  4. 2. Mechanochemical Modeling of Smooth Muscle Activation

    Author : Sae-Il Murtada; Gerhard A. Holzapfel; Robert McMeeking; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Biomechanics; Muscle contraction; Smooth muscle; Contractile unit; Filament overlap; Intracellular calcium; Carotid artery; Mathematical model;

    Abstract : Smooth muscle has an important role in several physiological processes, where it regulates the wall tension and the size of hollow organs. In blood vessels, the contraction and relaxation of smooth muscle contribute to the mechanical stability of the vessel wall and determines the diameter. READ MORE

  5. 3. Computer Aided Angioplasty : Patient-specific arterial modeling and smooth 3D contact analysis of the stent-balloon-artery interaction

    Author : Dimitrios Kiousis; Gerhard Holzapfel; Kenneth Runesson; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Contact; continuous surfaces; B-splines; balloon angioplasty; stenting; FEM; Bioengineering; Bioteknik;

    Abstract : Paper A: In this paper, the development and implementation of a contact algorithm based on C2-continuous surface representations is discussed. In 3D contact simulations involving models with arbitrarily curved surfaces (as in the case of vessel walls), the discretization of the contact surfaces by means of facet-based techniques could lead to numerical instabilities and finally loss of quadratic convergence. READ MORE