Search Results - "Ionescu, Ioan R."

Orthotropic strain rate potential for the description of anisotropy in tension and compression of metals by Cazacu, Oana, Ionescu, Ioan. R., Yoon, Jeong Whan

“…In this paper, a macroscopic anisotropic strain rate potential, which can describe both the anisotropy and tension-compression asymmetry of the plastic…”
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A Lagrangian DG-Method for Wave Propagation in a Cracked Solid with Frictional Contact Interfaces by Gomez, Quriaky, Goument, Benjamin, Ionescu, Ioan R.

“…We developed a discontinuous Galerkin (DG) numerical scheme for wave propagation in elastic solids with frictional contact interfaces. This type of numerical…”
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Design of pre-stressed plate-strips to cover non-developable shells by Danescu, Alexandre, Ionescu, Ioan R.

“…In this paper we address the following design problem: what is the shape of a plate and the associated pre-stress that relaxes toward a given three-dimensional…”
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Viscoplastic modeling of granular column collapse with pressure-dependent rheology by Ionescu, Ioan R., Mangeney, Anne, Bouchut, François, Roche, Olivier

“…•The two parameters rheological model very well reproduces the laboratory experiments.•Drucker–Prager plasticity with a constant viscosity better than the μ(I)…”
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Viscoplastic shallow flow equations with topography by Ionescu, Ioan R.

“…► A new shallow flow model for visco-plastic fluids with cohesion was deduced. ► The deduced model works for a general basal topography. ► The model points out…”
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Tempering the mechanical response of FCC micro-pillars: An Eulerian plasticity approach by Salman, Og̃uz Umut, Ionescu, Ioan R.

“…•The first use of a “minimal” 2D Eulerian plasticity approach in modeling micro-pillars compression.•The model reproduces ductile fracture (kink band…”
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Numerical modeling of wave propagation in a cracked solid by Gomez, Quriaky, Ciobanu, Oana, Ionescu, Ioan R

“…In this study, we investigate the dynamics of (damaged) materials with a nonlinear microstructure (microcracks in frictional contact) using a discontinuous…”
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Augmented Lagrangian for shallow viscoplastic flow with topography by Ionescu, Ioan R.

“…In this paper we have developed a robust numerical algorithm for the visco-plastic Saint-Venant model with topography. For the time discretization an implicit…”
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Schwarz method for earthquake source dynamics by Badea, Lori, Ionescu, Ioan R., Wolf, Sylvie

“…Dynamic faulting under slip-dependent friction in a linear elastic domain (in-plane and 3D configurations) is considered. The use of an implicit time-stepping…”
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Random multiple-fragmentation and flow of particles on a surface by Beznea, Lucian, Ionescu, Ioan R., Lupaşcu-Stamate, Oana

“…We investigate stochastic fragmentation processes for particles with spatial position. The mathematical problem models the time evolution of a system of…”
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On the effective friction law of a heterogeneous fault by Campillo, Michel, Favreau, Pascal, Ionescu, Ioan R., Voisin, Christophe

“…Numerical simulation of the rupture process is usually performed under an assumption of scale invariance of the friction process although heterogeneous fault…”
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Onset and dynamic shallow flow of a viscoplastic fluid on a plane slope by Ionescu, Ioan R.

“…The shallow flow of a viscoplastic fluid on a plane slope is investigated. The material constitutive law may include two plasticity (flow/no-flow) criteria:…”
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Dynamic crystal plasticity: An Eulerian approach by Cazacu, Oana, Ionescu, Ioan R.

“…In this paper an Eulerian rate-dependent single crystal model that accounts for high-strain rates, large strains and rotations is developed. The viscoplastic…”
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Structure–soil–structure coupling in seismic excitation and “city effect” by Ghergu, Marius, Ionescu, Ioan R.

“…We study the interaction between the buildings of a city through a fully coupling structure–soil–structure model. The main issues are to emphasize the…”
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Augmented Lagrangian method for Eulerian modeling of viscoplastic crystals by Cazacu, Oana, Ionescu, Ioan R.

“…A robust numerical algorithm for an Eulerian rigid-viscoplastic crystal model that accounts for high-strain rates, large strains, and large material and…”
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Discontinuous velocity domain splitting in limit analysis by Ionescu, Ioan R., Oudet, Édouard

“…We present a new limit analysis method, originated in Ionescu and Lachand-Robert (2005) and called discontinuous velocity domain splitting method (DVDS). DVDS…”
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Earth surface effects on active faults : An eigenvalue asymptotic analysis by IONESCU, Ioan R, VOLKOV, Darko

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Numerical modeling of projectile penetration into compressible rigid viscoplastic media by Cazacu, Oana, Ionescu, Ioan R., Perrot, Thomas

“…We develop computational methods for modeling penetration of a rigid projectile into porous media. Compressible rigid viscoplastic models are used to capture…”
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Asymptotic analysis and scaling of friction parameters by Bucur, Dorin, Ionescu, Ioan R.

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Compressible rigid viscoplastic fluids by Cazacu, Oana, Ionescu, Ioan R.

“…In this paper, a general methodology for constructing fluid-type constitutive equations for description of the behavior of porous media when subjected to large…”
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