Πλοήγηση ανά Θέμα "DEFORMATION"
Αποτελέσματα 1-20 από 26
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The adhesive contact of a flat punch on a hyperelastic substrate subject to a pull-out force or a bending moment
(2011)In the last decade; instrumented macro- and nano-indentation tests have become useful tools for probing mechanical properties of materials. In this context, little in-depth work has been done for soft bio-materials like ... -
Analysis of fault rupture propagation through uniform soil cover
(2009)This paper presents results from numerical simulations of the propagation of an active dip-slip fault rupture through a uniform soil layer covering the rigid bedrock. Following verification of the numerical methodology ... -
Bubble rise dynamics in a viscoplastic material
(2015)The axisymmetric dynamics of a bubble rising in a Bingham fluid under the action of buoyancy is studied. The Volume-of-Fluid (VOF) method is used to solve the equations of mass and momentum conservation, coupled to an ... -
Conical indentation of incompressible rubber-like materials
(2009)In the last decade, the indentation test has become a useful tool for probing mechanical properties of small material volumes. In this context, little has been done for rubber-like materials (elastomers), although there ... -
Constitutive modeling of porous viscoelastic materials
(2007)The effect of porosity on the constitutive response of an isotropic linearly viscoelastic solid that obeys a constitutive law of the standard differential form is investigated under small strain deformation conditions. The ... -
Constitutive modeling of solid propellant materials with evolving microstructural damage
(2008)Solid propellants are composite materials with complex microstructure. In a generic form, the material consists of polymeric binder, crystal oxidizer (e.g., ammonium perchlorate), and fuel particles (e.g., aluminum). Severe ... -
The effect of interfacial slip on the dynamics of a drop in flow: Part I. Stretching, relaxation, and breakup
(2012)Using a numerical method based on the boundary-integral technique, we assess the impact of interfacial slip on the dynamics of deformation and breakup of a single drop subjected to a uniaxial extensional flow under ... -
Elastic and viscoelastic indentation of flat surfaces by pyramid indentors
(2006)The present work presents the results of frictionless and adhesionless contact of flat surfaces by pyramid indentors. The materials of the contacting solids were modelled as homogeneous and isotropic, linear elastic, as ... -
Elastic properties of nanostructured materials with layered grain boundary structure
(2007)Atomistic calculations of the elastic constants for a bulk nanostructured material that consists of a layered structure where alternating layers meet along high angle grain boundaries and where atoms interact via a ... -
Explicit integration of bounding surface model for the analysis of earthquake soil liquefaction
(2010)This paper presents a new plasticity model developed for the simulation of monotonic and cyclic loading of non-cohesive soils and its implementation to the commercial finite-difference code FLAC, using its User-Defined-Model ... -
Finite element analysis of discrete edge dislocations: Configurational forces and conserved integrals
(2015)We present a finite element description of Volterra dislocations using a thermal analogue and the integral representation of dislocations through stresses in the context of linear elasticity. Several analytical results are ... -
Finite element implementation of gradient plasticity models - Part I: Gradient-dependent yield functions
(1998)Theories with intrinsic or material length scales find applications in the modeling of size-dependent phenomena such as, for example, the localization of plastic flow into shear bands. In gradient-type plasticity theories, ... -
Finite element simulation of the mechanical impact of computer work on the carpal tunnel syndrome
(2014)Carpal tunnel syndrome (CTS) is a clinical disorder resulting from the compression of the median nerve. The available evidence regarding the association between computer use and CTS is controversial. There is some evidence ... -
High performance MRI simulations of motion on multi-GPU systems
(2014)Background: MRI physics simulators have been developed in the past for optimizing imaging protocols and for training purposes. However, these simulators have only addressed motion within a limited scope. The purpose of ... -
Hydrogen induced shear localization of the plastic flow in metals and alloys
(2001)Hydrogen enhanced localized plasticity (HELP) is a viable mechanism for hydrogen embrittlement supported by experimental observations. According to the HELP mechanism, hydrogen induced premature failures result from hydrogen ... -
A Linear Complementarity formulation of rate-independent finite-strain elastoplasticity. Part I: Algorithm for numerical integration
(2012)A methodology for the numerical integration of rate-independent, elastic-plastic finite-strain models is developed. The methodology is based on the idea of local linearization of the yield surface that was proposed in Maier ... -
Material modeling of biofilm mechanical properties
(2014)A biofilm material model and a procedure for numerical integration are developed in this article. They enable calculation of a composite Young's modulus that varies in the biofilm and evolves with deformation. The ... -
A model based on the assessment of intrinsic creep resistance concept
(2003)In the present study a simple model is proposed to assess creep behavior. The model is applied to experimental results performed on austenitic steel X8 CrNiMoNb 16 16. The model is based on a modification of the Levy-Mises ... -
A numeric-symbolic approach to the problem of localization of plastic flow
(2001)A method combining numerical and symbolic computations is presented for deciding whether or not a mechanical state given numerically in terms of its fourth-order tenser of moduli satisfies the localization condition, and ... -
On the effect of hydrogen on plastic instabilities in metals
(2003)Experimental observations and theoretical calculations have demonstrated that hydrogen solute atoms increase the dislocation mobility in metals and alloys, thus promoting highly localized plastic processes which eventually ...