scholarly journals Actuation of an elastic membrane by the use of an electrorheological valve

PAMM ◽  
2021 ◽  
Vol 20 (1) ◽  
Author(s):  
Thomas Schomberg ◽  
Florian Gerland ◽  
Olaf Wünsch ◽  
Markus Rütten
Keyword(s):  
Elastic Membrane

Shock loading of fixed flexible thread and orthotropic elastic membrane

2003 ◽  
Vol 3 ◽  
pp. 52-59
Author(s):  
S.S. Komarov ◽  
N.Yu. Tsvileneva ◽  
N.I. Miskaktin
Keyword(s):  
Numerical Methods ◽  
Dynamic Loading ◽  
Elastic Deformation ◽  
Numerical Algorithm ◽  
Shock Loading ◽  
Elastic Membrane ◽  
Wave Dynamics ◽  
Elastic Membranes ◽  
Pneumatic Structures

The main problems of the wave dynamics of flexible filaments and elastic membranes are solved. The reliability of the numerical algorithm proposed by the authors for calculating the elastic deformation of pneumatic structures under dynamic loading is confirmed when compared with the results of known studies obtained by analytical and numerical methods.

scholarly journals A stable scheme for a nonlinear, multiphase tumor growth model with an elastic membrane

2014 ◽  
Vol 30 (7) ◽  
pp. 726-754 ◽  
Author(s):  
Ying Chen ◽  
Steven M. Wise ◽  
Vivek B. Shenoy ◽  
John S. Lowengrub
Keyword(s):  
Tumor Growth ◽  
Growth Model ◽  
Elastic Membrane ◽  
Tumor Growth Model ◽  
Stable Scheme

Effect of laser-induced cavitation bubble on a thin elastic membrane

2014 ◽  
Vol 64 ◽  
pp. 94-100 ◽  
Author(s):  
U. Orthaber ◽  
R. Petkovšek ◽  
J. Schille ◽  
L. Hartwig ◽  
G. Hawlina ◽  
...  
Keyword(s):  
Cavitation Bubble ◽  
Elastic Membrane

Bifurcation of rotating circular cylindrical elastic membranes

1980 ◽  
Vol 87 (2) ◽  
pp. 357-376 ◽  
Author(s):  
D. M. Haughton ◽  
R. W. Ogden
Keyword(s):  
Axial Force ◽  
Strain Energy ◽  
Elastic Strain Energy ◽  
Strain Energy Function ◽  
Angular Speed ◽  
Elastic Membrane ◽  
Axial Extension ◽  
End Conditions ◽  
Elastic Membranes ◽  
Realistic Choice

SummaryBifurcation from a finitely deformed circular cylindrical configuration of a rotating circular cylindrical elastic membrane is examined. It is found (for a physically realistic choice of elastic strain-energy function) that the angular speed attains a maximum followed by a minimum relative to the increasing radius of the cylinder for either a fixed axial extension or fixed axial force.At fixed axial extension (a) a prismatic mode of bifurcation (in which the cross-section of the cylinder becomes uniformly non-circular) may occur at a maximum of the angular speed provided the end conditions on the cylinder allow this; (b) axisyim-metric modes may occur before, at or after the angular speed maximum depending on the length of the cylinder and the magnitude of the axial extension; (c) an asymmetric or ‘wobble’ mode is always possible before either (a) or (b) as the angular speed increases from zero for any length of cylinder or axial extension. Moreover, ‘wobble’ occurs at lower angular speeds for longer cylinders.At fixed axial force the results are similar to (a), (b) and (c) except that an axisym-metric mode necessarily occurs between the turning points of the angular speed.

ASME Centennial Historical Perspective Paper: Mechanics of Blood Flow

1981 ◽  
Vol 103 (2) ◽  
pp. 102-115 ◽  
Author(s):  
R. Skalak ◽  
S. R. Keller ◽  
T. W. Secomb
Keyword(s):  
Blood Flow ◽  
Wave Propagation ◽  
Viscoelastic Behavior ◽  
Leonardo Da Vinci ◽  
Arterial System ◽  
Elastic Membrane ◽  
Biological Knowledge ◽  
Collapsible Tubes ◽  
Precise Understanding ◽  
Leonhard Euler

The historical development of the mechanics of blood flow can be traced from ancient times, to Leonardo da Vinci and Leonhard Euler and up to the present times with increasing biological knowledge and mathematical analysis. In the last two decades, quantitative and numerical methods have steadily given more complete and precise understanding. In the arterial system wave propagation computations based on nonlinear one-dimensional modeling have given the best representation of pulse wave propagation. In the veins, the theory of unsteady flow in collapsible tubes has recently been extensively developed. In the last decade, progress has been made in describing the blood flow at junctions, through stenoses, in bends and in capillary blood vessels. The rheological behavior of individual red blood cells has been explored. A working model consists of an elastic membrane filled with viscous fluid. This model forms a basis for understanding the viscous and viscoelastic behavior of blood.

scholarly journals Variational modelling of nematic elastomer foundations

2018 ◽  
Vol 28 (14) ◽  
pp. 2863-2904
Author(s):  
Pierluigi Cesana ◽  
Andrés A. León Baldelli
Keyword(s):  
Liquid Crystal ◽  
Integral Functional ◽  
Elastic Membrane ◽  
Two Dimensional ◽  
Order Tensor ◽  
Asymptotic Regime ◽  
Liquid Crystal Elastomer ◽  
Energy Functionals ◽  
Shear Energy ◽  
Dimensional Integral

We compute the [Formula: see text]-limit of energy functionals describing mechanical systems composed of a thin nematic liquid crystal elastomer sustaining a homogeneous and isotropic elastic membrane. We work in the regime of infinitesimal displacements and model the orientation of the liquid crystal according to the order tensor theories of both Frank and De Gennes. We describe the asymptotic regime by analysing a family of functionals parametrised by the vanishing thickness of the membranes and the ratio of the elastic constants, establishing that, in the limit, the system is represented by a two-dimensional integral functional interpreted as a linear membrane on top of a nematic active foundation involving an effective De Gennes optic tensor which allows for low order states. The latter can suppress shear energy by formation of microstructure as well as act as a pre-strain transmitted by the foundation to the overlying film.

Design of Ultra Low Temperature Pressure and Temperature Sensor Structure

2011 ◽  
Vol 80-81 ◽  
pp. 693-697
Author(s):  
Chang Hong Ji ◽  
Bin Zhen Zhang ◽  
Jian Zhang ◽  
Xiang Hong Li ◽  
Jian Lin Liu
Keyword(s):  
Thin Film ◽  
Low Temperature ◽  
Pressure Sensor ◽  
Temperature Sensor ◽  
Elastic Membrane ◽  
Temperature Influence ◽  
Sensor Sensitivity ◽  
Piezoresistive Pressure Sensor ◽  
Sensor Structure

In order to measure the pressure in the ultra-low temperature condition, the structure of ultra-low temperature piezoresistive pressure sensor is designed. Polysilicon nanometer thin film is used as a varistor according to its temperature and piezoresistive characteristics. The effect of the dimensions of silicon elastic membrane for the sensor sensitivity and the strain dimensions of the elastic membrane are analyzed, then layout position of resistances is arranged. The package structure of pressure sensor is designed. Meanwhile, a low-temperature sensor is designed to compensate the temperature influence to the pressure sensor.

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