scholarly journals Computational stochastic homogenization of heterogeneous media from an elasticity random field having an uncertain spectral measure

2021 ◽  
Author(s):  
Christian Soize
Keyword(s):  
Random Field ◽  
Spectral Measure ◽  
Heterogeneous Media ◽  
Stochastic Homogenization

On spectral measure and Monte Carlo Approaches to flow in heterogeneous media

1992 ◽  
Vol 28 (5) ◽  
pp. 1447-1450 ◽  
Author(s):  
Fei-Wen Deng ◽  
John H. Cushman
Keyword(s):  
Monte Carlo ◽  
Spectral Measure ◽  
Heterogeneous Media

Comparison of random field strengths in (1-x)SrTiO3-xBiFeO3 and (1-x)SrTiO3-xBaTiO3 relaxor ferroelectrics by means of acoustic emission

2020 ◽  
Vol 92 (2) ◽  
pp. 20401
Author(s):  
Evgeniy Dul'kin ◽  
Michael Roth
Keyword(s):  
Acoustic Emission ◽  
Random Field ◽  
Electric Fields ◽  
Bias Field ◽  
Relaxor Ferroelectrics ◽  
External Bias ◽  
Field Strengths

In relaxor (1-x)SrTiO3-xBiFeO3 ferroelectrics ceramics (x = 0.2, 0.3 and 0.4) both intermediate temperatures and Burns temperatures were successfully detected and their behavior were investigated in dependence on an external bias field using an acoustic emission. All these temperatures exhibit a non-trivial behavior, i.e. attain the minima at some threshold fields as a bias field enhances. It is established that the threshold fields decrease as x increases in (1-x)SrTiO3-xBiFeO3, as it previously observed in (1-x)SrTiO3-xBaTiO3 (E. Dul'kin, J. Zhai, M. Roth, Phys. Status Solidi B 252, 2079 (2015)). Based on the data of the threshold fields the mechanisms of arising of random electric fields are discussed and their strengths are compared in both these relaxor ferroelectrics.

Vibroacoustic dynamics of heterogeneous media and NPP structures

2014 ◽  
Vol 2014 (1) ◽  
pp. 99-110
Author(s):  
Vladimir Sergeevich Fedotovskij ◽  
Tat’yana Nikolaevna Vereschagina ◽  
Svetlana Valer’evna Lunina ◽  
Evgeniya Aleksandrovna Ivanova
Keyword(s):  
Heterogeneous Media
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