Journal of engineering mechanics, Vol. 135 N°3. Journal of engineering mechanics (ASCE) - Mars 2009
| Titre : | Journal of engineering mechanics, Vol. 135 N°3. Journal of engineering mechanics (ASCE) - Mars 2009 |
| Type de document : | Bulletin |
| Paru le : | 02/05/2009 |
Dépouillements
Article : texte imprimé
A unifying thermomechanical framework is presented that reconciles several classes of gradient elastoviscoplasticity and damage models proposed in the literature during the last 40 years. It is based on the introduction of the micromorphic coun[...]
Article : texte imprimé
The plastic shear localization is studied via the flow theory of mechanism-based strain gradient plasticity. The shear strain rate displays a rather sharp decrease from the center to the boundary of shear band, and gradually approaches the unifo[...]
Article : texte imprimé
George Z. Voyiadjis, Auteur ;
Amin H. Almasri, Auteur
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Material length scale that can be used in nonlocal gradient theories is obtained in this work based on experimental observations for two metals using nanoindentation experiments. The materials are cold rolled 1018 steel and oxygen free high cond[...]
Article : texte imprimé
Youping Chen, Auteur ;
James Lee, Auteur ;
Liming Xiong, Auteur
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Classic continuum mechanics views a crystal as a homogeneous and continuous medium, in which the basic structural unit of the crystal is taken without structure and is idealized as point mass. Micromorphic theory views a material as a continuous[...]
Article : texte imprimé
C. B. Hirschberger, Auteur ;
P. Steinmann, Auteur
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A classification of various formulations coined as generalized plasticity is introduced. Thereby the authors present variants of both gradient and micromorphic plasticity, which prove thermodynamically consistent by fulfilling the second law of [...]
Article : texte imprimé
A technique for setting up generalized continuum theories based on a balance law and nonlocal thermodynamics is suggested. The methodology does not require the introduction of gradients of the internal variable in the free energy, while allowing[...]
Article : texte imprimé
A finite strain micromorphic pressure-sensitive plasticity model is formulated starting with thermodynamically conjugate stresses and plastic deformation rates in the reduced dissipation inequality, written in the intermediate configuration. Iso[...]
Article : texte imprimé
James D. Lee, Auteur ;
Xianqiao Wang, Auteur ;
Youping Chen, Auteur
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This paper presents a multiscale field theory and its applications in modeling and simulation of atomistic systems. The theoretical construction of the multiscale field theory is briefly introduced. A single crystal is discretized into finite-el[...]
Article : texte imprimé
A. Zervos, Auteur ;
S.-A. Papanicolopulos, Auteur ;
I. Vardoulakis, Auteur
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We present and compare two different methods for numerically solving boundary value problems of gradient elasticity. The first method is based on a finite-element discretization using the displacement formulation, where elements that guarantee c[...]
Article : texte imprimé
Raffaele Ardito, Auteur ;
Claudia Comi, Auteur
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The evaluation of loss mechanisms in microscale mechanical resonators is addressed. Among various dissipation causes, thermoelastic loss is considered as a fundamental dissipation mechanism in microbeam resonators packed in a near-vacuum environ[...]
Article : texte imprimé
A. Carpinteri, Auteur ;
M. Corrado, Auteur ;
M. Paggi, Auteur
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The well-known cohesive crack model describes strain localization with a softening stress variation in concrete members subjected to tension. An analogous behavior is also observed in compression, when strain localization takes place in a damage[...]
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