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      The Creep-Damage Model of Salt Rock Based on Fractional Derivative

      , , , ,
      Energies
      MDPI AG

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          Abstract

          The use of salt rock for underground radioactive waste disposal facilities requires a comprehensive analysis of the creep-damage process in salt rock. A computer-controlled creep setup was employed to carry out a creep test of salt rock that lasted as long as 359 days under a constant uniaxial stress. The acoustic emission (AE) space-time evolution and energy-releasing characteristics during the creep test were studied in the meantime. A new creep-damage model is proposed on the basis of a fractional derivative by combining the AE statistical regularity. It indicates that the AE data in the non-decay creep process of salt rock can be divided into three stages. Furthermore, the authors propose a new creep-damage model of salt rock based on a fractional derivative. The parameters in the model were determined by the Quasi-Newton method. The fitting analysis suggests that the new creep-damage model provides a precise description of full creep regions in salt rock.

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          Most cited references12

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          A creep constitutive model for salt rock based on fractional derivatives

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            Fractional calculus in the transient analysis of viscoelastically damped structures

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              Fractal property of spatial distribution of acoustic emissions during the failure process of bedded rock salt

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                Author and article information

                Journal
                ENERGA
                Energies
                Energies
                MDPI AG
                1996-1073
                September 2018
                September 06 2018
                : 11
                : 9
                : 2349
                Article
                10.3390/en11092349
                93dfc010-2fcd-42ba-b9c7-1658bae3ffeb
                © 2018

                https://creativecommons.org/licenses/by/4.0/

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