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6 papers · 1 filter
A plasticity model with yield surface distortion for non proportional loading
Marc Louis Maurice François
In order to enhance the modeling of metallic materials behavior in non proportional loadings, a modification of the classical elastic-plastic models including distortion of the yie…
A new yield criterion for the concrete materials
Marc Louis Maurice François
The proposed yield criterion depends upon two material constants and is proven to be smooth and convex under a simple condition. These properties induce a mathematical robustness t…
Une nouvelle analyse des symétries d'un matériau élastique anisotrope. Exemple d'utilisation à partir de mesures ultrasonores
Marc Louis Maurice François, Yves Berthaud, Giuseppe Geymonat
This note deals with stiffness tensors measured from anisotropic linear elastic materials, whose symmetry is unknown. Their possible symmetries (exact or approximative) are reveale…
A damage model with non-convex free energy for quasi-brittle materials
Marc Louis Maurice François
A state coupling between the hydrostatic (volumetric) and deviatoric parts of the free energy is introduced in a damage mechanics model relevant for the quasi-brittle materials. It…
Numerical study of the temperature and porosity effects on the fracture propagation in a 2D network of elastic bonds
Harold Auradou, Maria Zei, Elisabeth Bouchaud
This article reports results concerning the fracture of a 2d triangular lattice of atoms linked by springs. The lattice is submitted to controlled strain tests and the influence of…
Supercritical bifurcation of a hula hoop
Frederic Moisy
The motion of a hoop hung on a spinning wire provides an illustrative and pedagogical example of a supercritical bifurcation. Above a certain angular velocity threshold Omega_c, th…