1,720,961 research outputs found
Torsional deformations in incompressible fibre--reinforced cylindrical pipes
No full textThe first part of the paper deals with an extension of the classical Rivlin’s solution of the torsion problem of a neo-Hookean pipe. The second part concerns a study of the passive torsional deformation processes in a fibre-reinforced cylindrical dummy of the beating heart. Especially, the dependence of the torsional and volumetric stiffness of the cylindrical pipe on different geometric and material parameters is discussed through a set of numerical simulations
Passive and Active Deformation Processes of 3D Fibre-Reinforced Caricatures of Cardiovas- cular Tissues
No full textMechanical response of helically wound fiber-reinforced incompressible non-linearly elastic pipes
No full textWe study the mechanical response of a helically wound fiber–reinforced
incompressible axisymmetric structure under torsion and compare it with the response
turning out from the classical Rivlin solution of the torsion problem of a
neo-Hookean pip
Passive and Active Deformation Processes in Cardiac Tissue
No full textWe present a continuum model able to describe the mechanism of muscle
contractions from a macroscopic point of view
Passive and Active Deformation Processes of 3D Fibre-Reinforced Caricatures of Cardiovascular Tissues
No full textIn this paper, we present a mathematical
model of contractile elastic solids
meant to simulate various districts of the cardiovascular
system, and based on the concepts
of active deformation and embedded muscle -
bres.
Specically, here we deal with the modelling
of the gross mechanics of the left ventricle
(LV) which is strictly related to its pump
function. The muscle bres embedded in the
LV walls govern, through their contraction and
relaxation, the characteristic phases of the cardiac
cycle. Moreover, muscle bres dene the
anisotropy directions of the LV wall, and the
collagene bres determine the material properties
along these directions; thus, to model the
mechanical behaviour of the LV, both the passive
and the active material properties of the
must be accurately accounted for. As is well
known, the eectiveness of the pumping action
is well represented by the pressure-volume
(PV) diagrams that relate the blood pressure
to the volume of the LV during the cardiac cycle.
Here, we aim at reproducing realistic PV
by specifying appropriate sequence of muscle
contractio
Torsional deformations in incompressible fibre–reinforced cylindrical pipes
No full textThe first part of the paper deals with an extension of the classical Rivlin’s solution of the torsion problem of a neo-Hookean pipe. The second part concerns a study of the passive torsional deformation processes in a fibre-reinforced cylindrical dummy of the beating heart. Especially, the dependence of the torsional and volumetric stiffness of the cylindrical pipe on different geometric and material parameters is discussed through a set of numerical simulations
Mechanical response of Helically Wound Fiber-Reinforced Incompressible Non-linearly Elastic Pipes
No full text
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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