This study aims at performing grain scaled energy balance in mechanically-loaded aluminum polycrystal specimen. Two complementary imaging techniques were used in order to investigate the so-called material thermomechanical behavior: Digital Image Correlation and InfraRed Thermography to investigate respectively the kinematic and the thermal response of the material and, combining these two tech...

This paper considers a thermomechanical model describing the behavior of shape memory alloys (SMA). This new model (see [3]) takes into account the nonisothermal character of the phase transformations, as well as the existence of the intrinsic dissipation. For the governing equations we prove existence, uniqueness and regularity in certain well chosen functions spaces. MSC: 74N30, 74H20, 74H25.

CEA, DEN, Service de Recherches Métallurgiques Appliquées, 91191 Gif-sur-Yvette, France Centre de mise en forme des matériaux (CEMEF), Mines Paris-tech, CNRS UMR 7635, BP 207, 1 rue Claude Daunesse, 06904 Sophia Antipolis Cedex, France c Laboratory of Thermomechanical Metallurgy – PX Group Chair, Ecole Polytechnique Fédérale de Lausanne (EPFL), Rue de la Maladière 71b – CP 526, CH-2002 Neuchâte...

2014 It has been observed that in cholesterics shear flow induces a transverse drift of small particles suspended in the liquid crystal. Quantitative measurements of the drift velocity are presented. The effect is interpreted using the analogy of the thermomechanical coupling, predicted for cholesterics. J. Physique LETTRES 42 ( 1981 ) L-41 L-43 Classification Physics Abstracts 61.30 15 JANVIER...

THERMOMECHANICAL FINITE ELEMENT ANALYSIS. Andrew J. Dombard ([email protected]), Sean C. Solomon, Mark A. Bullock, Roger J. Phillips, and David H. Grinspoon, Dept. of Earth & Planetary Sciences, Washington University, Saint Louis, MO 63130, Dept. of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Rd., NW, Washington, DC 20015, Dept. of Space Studies, Southwest ...

Because of the small thermal capacity of ultrathin ( approximately 200 nanometers) metal single crystals, it is possible to explore the coupling of catalytic and thermal action at low pressures. We analyzed a chemothermomechanical instability in this regime, in which catalytic reaction kinetics interact with heat transfer and mechanical buckling to create oscillations. These interacting compone...

An approach is developed to predict stability of carbyne-based nanodevices. Within this approach, the thermo-fluctuation model of instability and break of contact bond in nanodevices, containing carbyne chains and graphene sheets, is offered. Unlike the conventional models, it does not include empirical constants. The results of DFT calculations are used as initial data for this model. Possibil...

Carboxylic acid groups were introduced onto thermomechanical pulp (TMP) long fiber surfaces by 2,2,6,6,tetramethylpiperidine-1-oxyl radical (TEMPO)-mediated oxidation in the present study. The number of introduced carboxylic groups was closely related to the NaClO dosage, and more flexible fibers with lower curl and kink index were generated. Lignin was dissolved during the TEMPO-mediated oxida...

Thermomechanical analysis (TMA) is widely used to characterize materials and determine transition temperatures and thermal expansion coefficients. Atomic-force microscopy (AFM) microcantilevers have been used for TMA. We have developed a micromachined probe that includes two embedded sensors: one for measuring the mechanical movement of the probe (deflection) and another for providing localized...

Covering the solid lattice with a finite-element mesh produces a coarse-grained system of mesh nodes as pseudoatoms interacting through an effective potential energy that depends implicitly on the thermodynamic state. Use of the pseudoatomic Hamiltonian in a Monte Carlo simulation of the two-dimensional Lennard-Jones crystal yields equilibrium thermomechanical properties (e.g., isotropic stress...