Multiphase continua for fiber-reinforced materials
Kinematics and constitutive relations in the stress-gradient theory: interpretation by homogenization
The stress-gradient theory has a third order tensor as kinematic degree of freedom, which is work-conjugate to the stress gradient. This tensor was called micro-displacements just for dimensional reasons. Consequently, this theory requires a constitutive relation between stress gradient and micro-displacements, in addition to the conventional stres...
Finite-deformation second-order micromorphic theory and its relations to strain and stress gradient models
Germain's general micromorphic theory of order n is extended to fully non-symmetric higher order tensor degrees of freedom. An interpretation of the microdeformation kinematic variables as relaxed higher order gradients of the displacement ?eld is proposed. Dynamical balance laws and hyperelastic constitutive equations are derived within the ?nite ...
Investigation of Crack Propagation in Asphalt Pavement Based on APT Result and LEFM Analysis
When reinforcing existing cracked asphalt pavements, the design and evaluation of the durability of the reinforced structure are quite different from those of a new pavement generally based on fatigue criteria deduced from stress and strain fields computed for the undamaged pavement. For the design of reinforcement solutions, the presence of cracks...
L'impact des formes urbaines dans la mise en place des politiques de transition énergétique : une approche par la modéli...
International audience
L'impact des formes urbaines dans la mise en place des politiques de transition énergétique : une approche par la modéli...
A Melan theorem in diffusion-induced plasticity: Applications to lithium-ion batteries
We present a Melan-type theorem applying to cyclically loaded media in which plastic flow and diffusion of guest atoms are coupled, such as electrode materials in lithium-ion batteries. The presented theorem ensures that elastic shakedown occurs ( i.e. that the plastic strain stabilizes to a time-independent limit), independently of the initial sta...
On the validity of several previously published perturbation formulas for the acoustoelastic effect on Rayleigh waves.
Published in Ultrasonics
This article revisits the evaluation by a perturbation theory of the modification of the Rayleigh wave velocity under a static loading varying with depth. Two derivations, that have been exposed in the past and presented as comparable, are questioned. A new derivation of the perturbation formula is given by adapting Auld's approach. Validation with...
Population characteristics and the decision to convert to organic farming
We revisit some ideas of why farmers do not convert to organic farming from our previous article with a dynamic individual based model. In this model, an agent's decision on transitioning to organic is based on the comparison between the satisfaction with its current situation and the potential satisfaction with an alternative farming strategy. A f...
Une anthropologie critique à l'ère de la globalisation ?
Cet article revient sur la notion de critique − issue de la philosophie, importante en sociologie − et montre ses différents déploiements en anthropologie, tout d'abord à travers ce qui est défini comme des moments et des fragments critiques dans les cinquante dernières années. L'auteure s'attache ensuite à cerner les contradictions et les tensions...
