PURPOSE During the last decades, derivatives and integrals of non-integer orders are being more commonly used for the description of constitutive behavior of various viscoelastic materials including soft biological tissues. Compared to integer order constitutive relations, non-integer order viscoelastic material models of soft biological tissues are capable of capturing a wider range of viscoel...

Si is a promising anode material for Li-ion batteries, since it absorbs large amounts of Li. However, insertion of Li leads to 334% of volumetric expansion, huge stresses, and fracture; it can be suppressed by utilizing nanoscale anode structures. Continuum approaches to stress relaxation in LixSi, based on plasticity theory, are unrealistic, because the yield strength of LixSi is much higher t...

Micropipette aspiration (MA) technique has been widely used to measure the viscoelastic properties of different cell types. Cells experience nonlinear large deformations during the aspiration procedure. Neo-Hookean viscohyperelastic (NHVH) incompressible and compressible models were used to simulate the creep behavior of cells in MA, particularly accounting for the effect of compressibility, bu...

We study the average velocity of crack fronts during stable interfacial fracture experiments in a heterogeneous quasibrittle material under constant loading rates and during long relaxation tests. The transparency of the material (polymethylmethacrylate) allows continuous tracking of the front position and relation of its evolution to the energy release rate. Despite significant velocity fluctu...

We present • study of the morphology •nd bulk physical properties of • Fontainebleau s•ndstone vi• an X ray tomographic •nalysis. Synchrotron-b•sed X ray tomographic techniques provide us with a high-resolution (7.5 •um), threedimensional digitized representation of the sandstone that leaves the s•mple intact and unaltered. To estimate • wide spectrum of bulk properties of the Fontainebleau s•n...

Many molecular glass forming liquids show a shift of the glass transition Tg to lower temperatures when the liquid is confined into mesoporous host matrices. Two contrary explanations for this effect are given in literature: First, confinement induced acceleration of the dynamics of the molecules leads to an effective downshift of Tg increasing with decreasing pore size. Second, due to thermal ...

We constructed a looped tube thermoacoustic engine equipped with a stack made of ceramics having many square pores and two heat exchangers. We employed three stacks with different pore sizes and studied the effect of changing the pore size on the acoustic field excited in the present engine through the pressure and velocity measurements. By analysing the experimental data, we are led to conclud...

Rheological material properties are high-dimensional function-valued quantities, such as frequency-dependent viscoelastic moduli or non-Newtonian shear viscosity. Here we describe a process to model and optimize design targets for such rheological material functions. For linear viscoelastic systems, we demonstrate that one can avoid specific a priori assumptions of spring-dashpot topology by wr...

Abstract 3D non-linear magnetohydrodynamic simulations of a disruption triggered by massive injection argon gas in JET are performed with the JOREK code. The key role thermal drive m = 2, n 1 tearing mode (i.e. from helical cooling inside island) process is highlighted varying amplitude and position source across simulations, also during simulation. In cases where this persists spite developmen...