Publications associées à Approximate cloaking for the full wave equation via change of variables: The Drude-Lorentz model

Symplectic Dynamical Low Rank approximation of wave equations with random parameters

In this paper we propose a dynamical low-rank strategy for the approximation of second order wave equations with random parameters. The governing equation is rewritten in Hamiltonian form and the approximate solution is expanded over a set of

2S

dynamica ...

2017

Ultra low cycle fatigue of welded steel joints under multiaxial loading

Albano António De Abreu E Presa De Castro E Sousa

Extreme loading scenarios such as earthquakes, exceptional wind gusts or tides are characterized by very high amplitude and multidirectional cyclic loads applied to a structure. Ultra Low Cycle Fatigue (ULCF) arises in such cases and can be summarily defin ...

EPFL2017

MATHICSE Technical Report : Effective models for long time wave propagation in locally periodic media

Timothée Noé Pouchon, Assyr Abdulle

A family of effective equations for the wave equation in locally periodic media over long time is derived. In particular, explicit formulas for the effective tensors are provided. To validate the derivation, an a priori error estimate between the effective ...

MATHICSE2017

A vector field method on the distorted Fourier side and decay for wave equations with potentials

Joachim Krieger, Roland Donninger

We study the Cauchy problem for the one-dimensional wave equation

\partial_t^2 u(t,x)-\partial_x^2 u(t,x)+V(x)u(t,x)=0.

The potential

V

is assumed to be smooth with asymptotic behavior

V(x)\sim -\tfrac14 |x|^{-2}\mbox{ as } |x|\to \infty.

...

2016

Auxetic Metamaterial Simplifies Soft Robot Design

Peer Fischer, Tian Qiu

Soft materials are being adopted in robotics in order to facilitate biomedical applications and in order to achieve simpler and more capable robots. One route to simplification is to design the robot's body using 'smart materials' that carry the burden of ...

Ieee2016

Two-dimensional fluid-filled closed-cell cellular solid as an acoustic metamaterial with negative index

A concept for acoustic metamaterials consisting of a cellular medium with fluid-filled cells is fabricated and studied experimentally. In such a system, the fluid and solid structure explicitly interact, and elastic wave propagation is coupled to both phas ...

Amer Physical Soc2016

Broadband Topological Non-Reciprocity in Time-Floquet Metamaterials

Romain Christophe Rémy Fleury

We introduce and discuss time-Floquet metamaterials, or artificial media possessing a double periodicity both in space and time. They can be obtained from a regular crystal by periodically modulating in time the physical properties of each unit cell, leadi ...

2016

Acoustic metamaterial properties of a 2D closed cellular solid with entrained fluid

Vladimir Dorodnitsyn

Metamaterials are often defined as artificial compositions designed to exhibit desired physical properties. These materials attract a lot of research attention due to unusual behavior that may not yet have been seen in nature. Although there is no commonly ...

EPFL2016

Reducing the shell thickness of double emulsions using microfluidics

Esther Amstad, Antoine Claude Jean Vian

Double emulsion drops are well-suited templates to produce capsules whose dimensions can be conveniently tuned by adjusting those of the drops. To closely control the release kinetics of encapsulants, the composition and thickness of the capsule shell must ...

Springer Verlag2016

A priori error analysis of the finite element heterogeneous multiscale method for the wave equation in heterogeneous media over long time

Timothée Noé Pouchon, Assyr Abdulle

A fully discrete a priori analysis of the finite element heterogeneous multiscale method introduced in [A. Abdulle, M. Grote, and C. Stohrer, Multiscale Model. Simul., 12, 2014, pp. 1135-1166] for the wave equation with highly oscillatory coefficients over ...

Siam Publications2016

Approximate cloaking for the full wave equation via change of variables: The Drude-Lorentz model

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Symplectic Dynamical Low Rank approximation of wave equations with random parameters

Ultra low cycle fatigue of welded steel joints under multiaxial loading

MATHICSE Technical Report : Effective models for long time wave propagation in locally periodic media

A vector field method on the distorted Fourier side and decay for wave equations with potentials

Auxetic Metamaterial Simplifies Soft Robot Design

Two-dimensional fluid-filled closed-cell cellular solid as an acoustic metamaterial with negative index

Broadband Topological Non-Reciprocity in Time-Floquet Metamaterials

Acoustic metamaterial properties of a 2D closed cellular solid with entrained fluid

Reducing the shell thickness of double emulsions using microfluidics

A priori error analysis of the finite element heterogeneous multiscale method for the wave equation in heterogeneous media over long time

Ultra low cycle fatigue of welded steel joints under multiaxial loading

Symplectic Dynamical Low Rank approximation of wave equations with random parameters

Two-dimensional fluid-filled closed-cell cellular solid as an acoustic metamaterial with negative index

Acoustic metamaterial properties of a 2D closed cellular solid with entrained fluid

A priori error analysis of the finite element heterogeneous multiscale method for the wave equation in heterogeneous media over long time

A vector field method on the distorted Fourier side and decay for wave equations with potentials

MATHICSE Technical Report : Effective models for long time wave propagation in locally periodic media

Broadband Topological Non-Reciprocity in Time-Floquet Metamaterials

Reducing the shell thickness of double emulsions using microfluidics

Auxetic Metamaterial Simplifies Soft Robot Design