Results 241 to 250 of about 28,768 (295)

Effect of stress on the shape of ferromagnetic hysteresis loops

Journal of Applied Physics, 2005
The shape of ferromagnetic hysteresis loops is described in terms of symmetric Brown and antisymmetric Bozorth stress fields. The magnetization and nonlinear stress dependence of stress fields are measured and plotted. The Brown field is found to exist in every magnetoelastic process and is manifested when hysteresis of 90° domain walls is asymmetric ...
exaly   +2 more sources

On Kinetic Nature of Hysteresis Phenomena in Stress-Induced Phase Transformations

, 2019
A simplest model is developed which demonstrates that hysteresis phenomena in stress-induced phase transformations may have a kinetic nature and follow from the discrepancy between strain rate and characteristic rate of the new phase growth.
Freidin A. B., Eremeyev V. A.
openaire   +3 more sources

Stress hysteresis and temperature dependence of phase transition stress in nanostructured NiTi—Effects of grain size

Applied Physics Letters, 2013
Stress hysteresis (H) and temperature dependence of phase transition stress (d σ / d T) are the two signatures of first-order phase transition in shape memory alloys.
Aslan Ahadi, Qingping Sun
exaly   +2 more sources

Hysteresis in stress cycling of amorphous ribbons

Journal of Magnetism and Magnetic Materials, 2004
The permeability of soft amorphous ribbons shows significant hysteresis through stress cycling. The response of a circuit incorporating an amorphous CoFeNiSiB based ribbon, as a function of longitudinal stress, with a longitudinal excitation field, is measured.
G.J. Tomka, J. Milne, S. Tweed, O. Thomas   +3 more
openaire   +2 more sources

Thermal stress hysteresis and stress relaxation in an epoxy film

Journal of Materials Science, 2007
Thermal cycling of an epoxy coating on silicon through the glass transition temperature (T g) revealed a large stress hysteresis on the first thermal cycle through T g and a change in the stress–temperature slope at T g resulting from the change in the epoxy elastic properties due to the glass transition.
Jeremy Thurn, Theresa Hermel-Davidock
openaire   +1 more source

A theory of ferroelectric hysteresis with a superimposed stress

Journal of Applied Physics, 2002
Based on the mechanism of domain switch, a micromechanics-based model is developed to calculate the hysteresis loop of ferroelectric ceramics under combined electromechanical loading. The development makes use of an extension of the Eshelby-type elastic inclusion problem to a heterogeneous electromechanically coupled ferroelectric medium with ...
W. F. Li, G. J. Weng
openaire   +1 more source

On non-monotonic rate dependence of stress hysteresis of superelastic shape memory alloy bars

International Journal of Solids and Structures, 2011
This paper presents a simple thermo-mechanical model to explain and quantify the observed strain-rate dependence of the stress hysteresis of shape memory alloys (SMAs) bars/strips during stress-induced forward/reverse phase transition with latent heat ...
Yongjun He, Qingping Sun
exaly   +2 more sources

Biaxial stress effects on hysteresis and MIVC

Journal of Magnetism and Magnetic Materials, 1995
Abstract Changes in the magnetic properties of a cruciform-shaped SAE-4130 steel specimen were measured under biaxial stress conditions. Compared to model predictions are the experimental remanence at various biaxial stresses and the magnetically induced velocity changes (MIVC) of ultrasonic shear and longitudinal waves propagated perpendicular to ...
M.J. Sablik, H. Kwun, G.L. Burkhardt
openaire   +1 more source

A Stress-Dependent Hysteresis Model for PZT

MRS Proceedings, 2005
AbstractThis paper addresses the development of an energy-based characterization framework which quantifies stress-induced dipole switching in ferroelectric materials. Helmholtz and Gibbs energy relations that accommodate 90° and 180° dipole orientations as equilibrium states are constructed at the lattice level. For regimes in which thermal relaxation
Brian L. Ball, Ralph C. Smith, Sang-Joo Kim, Stefan Seelecke   +3 more
openaire   +1 more source

Adaptive Hysteresis Compensation for SMA Actuators with Stress-Induced Variations in Hysteresisa

Journal of Intelligent Material Systems and Structures, 1999
The strain-temperature hysteresis for shape memory alloy (SMA) actuators has been shown to undergo large changes according to the applied load. This paper provides an adaptive hysteresis model capable of accounting for a time-varying hysteresis, specifically SMA hysteresis under a varying applied stress.
G. WEBB, D. LAGOUDAS, A. KURDILA
openaire   +1 more source