Publications

Mechanics of materials

Kelvin decomposition and multiple effective stresses concept in anisotropic materials

The effective stress concept, now classical in continuum damage mechanics, is generalized to the case of an initial anisotropy. In order to be used for both damage–elasticity and damage–(visco-)plasticity coupling, the effective stress should not…

Rodrigue Desmorat

Comptes Rendus. Mécanique - 2009

Mechanics of materials

Mécanique des matériaux solides - 3e édition

Ce cours s'adresse aux élèves-ingénieurs et aux étudiants en Masters ainsi qu'aux enseignants, aux chercheurs et aux ingénieurs. Cette nouvelle édition, entièrement revue et actualisée, s'intéresse aux phénomènes qui déterminent la résistance des…

Jean Lemaitre, Jean-Louis Chaboche, Ahmed Benallal, Rodrigue Desmorat

Materials

Early age behaviour of concrete nuclear containments

A numerical model has been developed to predict early-age cracking for massive concrete structures. Taking into account creep at early-age is essential if one wants to predict quantitatively the induced stresses if autogenous or thermal strains are…

Farid Benboudjema, Jean-Michel Torrenti

Nuclear Engineering and Design - 2008

Mechanics of materials

Topology optimization in damage governed low cycle fatigue

Topology optimization is applied here to discuss an optimization problem of fatigue resistance. Fatigue lifetime is maximized by optimizing the shape of a structure in cyclic plasticity combined with Lemaitre damage law. The topology optimization…

Boris Desmorat, Rodrigue Desmorat

Comptes Rendus. Mécanique - 2008

Mechanics of materials

Cross-identification isotropic/anisotropic damage and application to anisothermal structural failure

Cross-identification is an easy way to build confidence in a design solution for mechanical components, as it gives dif- ferent modeling possibilities for the same case study. As an example, phenomenological Lemaitre’s damage model is cross-…

Rodrigue Desmorat, S. Otin

Engineering Fracture Mechanics - 2008

Mechanics of materials

Continuum damage mechanics for hysteresis and fatigue of quasi‐brittle materials and structures

Abstract For a material exhibiting hysteresis such as quasi‐brittle materials, it is natural to consider that hysteresis and fatigue are related to each other. One shows in the present work that damage, from the continuum damage mechanics point of…

Rodrigue Desmorat, F. Ragueneau, H. Pham

International Journal for Numerical and Analytical Methods in Geomechanics - 2007

Mechanics of materials

Modèle d'endommagement avec refermeture de la porosité pour le calcul des ouvrages souterrains

A damage model is proposed to model ground loss of confinement around an underground excavation and apply it to the convergence-confinement method. The constitutive law is based, on the one hand on a continuous evolution of a damage scalar variable…

François Martin, Rodrigue Desmorat

Revue Européenne de Génie Civil - 2007

Mechanics of materials

Positivity of intrinsic dissipation of a class of nonstandard anisotropic damage models

A nonstandard thermodynamics framework ensures the positivity of the dissipation due to degradation mechanisms for damage states represented by a symmetric second order tensor. The proof of the positivity of the intrinsic dissipation is given. An…

Rodrigue Desmorat

Comptes Rendus. Mécanique - 2006

Mechanics of materials

Courbe de convergence d’un tunnel pour un modèle phénoménologique d’endommagement

A closed-form solution of the ground reaction curve is presented. Non-linearities of rock materials are modelled by using the isotropic phenomenological damage formalism. À validation of the solution by the transfer matrix method is proposed. The «…

F. Martin, Rodrigue Desmorat, A. Saitta

Revue française de Géotechnique - 2006

Mechanics of materials

Fatigue limit evaluations of a complex structure by using temperature measurements

The study deals with the long-term reliability of a high precision pressure sensor using bellows mainly made of electroplated Ni. The bellows are expected to stay in service for many decades. Their high cycle fatigue behavior has to be known to…

Olivier Arnould, Pierre Brémond, François Hild

Applied Mechanics and Materials - 2005