نتایج جستجو برای: hyperelastic

تعداد نتایج: 1368  

2003
Marc Droske Martin Rumpf Carlo Schaller

We present a novel variational method to non rigid registration of multi-modal data. A suitable deformation will be determined via the minimization of a morphological, i.e., contrast invariant, matching functional along with an appropriate regularization energy. Here we want to give special focus on the practical issues involving scale-space methods, regularization of the corresponding gradient...

2007
Robin Ming Chen

In this paper we study finite deformations in a pre-stressed, hyperelastic compressible plate. For small-amplitude nonlinear waves, we obtain equations that involve an amplitude parameter ε. Using an asymptotic perturbation technique, we derive a new family of two-dimensional nonlinear dispersive equations. This family includes the KdV, Kadomtsev-Petviashvili and Camassa-Holm equations.

Journal: :Journal of biomechanical engineering 2005
Alexander I Veress Grant T Gullberg Jeffrey A Weiss

The assessment of regional heart wall motion (local strain) can localize ischemic myocardial disease, evaluate myocardial viability, and identify impaired cardiac function due to hypertrophic or dilated cardiomyopathies. The objectives of this research were to develop and validate a technique known as hyperelastic warping for the measurement of local strains in the left ventricle from clinical ...

2017
Alain Goriely

For cellular bodies involving large elastic deformations, mesoscopic continuum models that take into account the interplay between the geometry and the microstructural responses of the constituents are developed, analysed and compared with finiteelement simulations of cellular structures with different architecture. For these models, constitutive restrictions for the physical plausibility of th...

2003
Alexander I. Veress Nikhil Phatak Jeffrey A. Weiss

The extraction of quantitative information regarding growth and deformation from series of image data is of significant importance in many fields of science and medicine. Imaging techniques such as MRI, CT and ultrasound provide a means to examine the morphology and in some cases metabolism of tissues. The registration of this image data between different time points after external loading, tre...

2004
R. W. Ogden

This paper is concerned with determining material parameters in incompressible isotropic elastic strain–energy functions on the basis of a non-linear least squares optimization method by fitting data from the classical experiments of Treloar and Jones and Treloar on natural rubber. We consider three separate forms of strain-energy function, based respectively on use of the principal stretches, ...

2008
Rossen I. Ivanov

We investigate the integrability of a class of 1+1 dimensional models describing nonlinear dispersive waves in continuous media, e.g. cylindrical compressible hyperelastic rods, shallow water waves, etc. The only completely integrable cases coincide with the Camassa-Holm and Degasperis-Procesi equations.

Journal: :The Laryngoscope 2015
David A Zopf Colleen L Flanagan Hassan B Nasser Anna G Mitsak Farhan S Huq Vishnu Rajendran Glenn E Green Scott J Hollister

OBJECTIVES/HYPOTHESIS The mechanical properties of normal auricular cartilage provide a benchmark against which to characterize changes in auricular structure/function due to genetic defects creating phenotypic abnormalities in collagen subtypes. Such properties also provide inputs/targets for auricular reconstruction scaffold design. Several studies report the biomechanical properties for sept...

Journal: :Advanced intelligent systems 2022

Soft growing robots have received considerable attention because of their unique locomotion. However, the use a single material for manufacturing causes numerous problems, each part robot requires different characteristics. This study attempts to solve this fundamental problem from perspective, rather than integrating independent solutions. A hyperelastic is proposed building soft robot. Severa...

Journal: :Investigative ophthalmology & visual science 2011
Abhijit Sinha Roy William J Dupps

PURPOSE To model keratoconus (KC) progression and investigate the differential responses of central and eccentric cones to standard and alternative collagen cross-linking (CXL) patterns. METHODS Three-dimensional finite element models (FEMs) were generated with clinical tomography and IOP measurements. Graded reductions in regional corneal hyperelastic properties and thickness were imposed se...

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