Results 161 to 170 of about 8,196 (223)
Statistical mechanics of bone damage: a constitutive model. [PDF]
Eur Biophys JGarcía-Vilana S, Sánchez-Molina D.
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International Journal of Solids and Structures, 1973
Abstract An alternative to the currently used Perzyna's theory of viscoplasticity for small strains is presented. The plastic strain rate vector is normal to the quasistatic yield surface which in turn may not include the origin. Consequently, new loading/unloading criteria are introduced.
Phillips, Aris, Wu, Han-Chin
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Abstract An alternative to the currently used Perzyna's theory of viscoplasticity for small strains is presented. The plastic strain rate vector is normal to the quasistatic yield surface which in turn may not include the origin. Consequently, new loading/unloading criteria are introduced.
Phillips, Aris, Wu, Han-Chin
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Viscoplasticity of respiratory tissues
Journal of Applied Physiology, 1990Low-frequency mechanical behavior of various respiratory tissues shows certain similarities. In this study we test the hypothesis that rate-independent plastic processes along with rate-dependent viscoelastic processes are responsible. We considered oscillatory responses of several respiratory tissues measured over prescribed ranges of frequency (up ...
D, Stamenović +3 more
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A comparison between the Perzyna viscoplastic model and the Consistency viscoplastic model
European Journal of Mechanics - A/Solids, 2002zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Heeres, O.M. +2 more
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Homogenization in Viscoplasticity
SIAM Journal on Mathematical Analysis, 2007In this work we present the justification of the formally derived homogenized problem for the quasi-static initial boundary value problem with internal variables, which models the deformation behavior of viscoplastic materials with a periodic microstructure.
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Averaging Models for Heterogeneous Viscoplastic and Elastic Viscoplastic Materials
Journal of Engineering Materials and Technology, 2001Averaging models are proposed for viscoplastic and elastic-viscoplastic heterogeneous materials. The case of rigid viscoplastic materials is first discussed. Large deformations are considered. A first class of models is based on different linearizations of the nonlinear local response.
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Viscoplastic fingering in rectangular channels
Physical Review E, 2020We experimentally study the viscous fingering problem of viscoplastic fluids in channels of rectangular cross section. We find that a yield stress-dependent capillary number (Ca^{*}) and an aspect ratio-dependent Bond number (Bo^{*}) can classify the finger shape into ramified and unified fingering patterns, and the finger flow regime into yield stress,
A. Eslami, S. M. Taghavi
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Slip of Spreading Viscoplastic Droplets
Langmuir, 2015The spreading of axisymmetric viscoplastic droplets extruded slowly on glass surfaces is studied experimentally using shadowgraphy and swept-field confocal microscopy. The microscopy furnishes vertical profiles of the radial velocity using particle image velocimetry (PIV) with neutrally buoyant tracers seeded in the fluid.
Maziyar, Jalaal +2 more
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Viscoplastic Analysis of Adhesive Joints
Journal of Applied Mechanics, 1996The uniaxial constitutive law for an adhesive is studied by constant strain rate tensile, creep and relaxation tests. The S-D effect of the adhesive is taken into account by using the Raghava yielding criterion in a three dimensional constitutive formulation. The obtained constitutive law is then used to analyze a single lap joint and a butt joint by a
Hu, G. K. +3 more
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