Preprint Article Version 1 This version is not peer-reviewed

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

Version 1 : Received: 30 July 2018 / Approved: 30 July 2018 / Online: 30 July 2018 (11:15:31 CEST)

A peer-reviewed article of this Preprint also exists.

Zhou, H.; Liu, D.; Lei, G.; Xue, D.; Zhao, Y. The Creep-Damage Model of Salt Rock Based on Fractional Derivative. Energies 2018, 11, 2349. Zhou, H.; Liu, D.; Lei, G.; Xue, D.; Zhao, Y. The Creep-Damage Model of Salt Rock Based on Fractional Derivative. Energies 2018, 11, 2349.

Journal reference: Energies 2018, 11, 2349
DOI: 10.3390/en11092349

Abstract

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

Subject Areas

salt rock; creep; damage; fractional derivative; acoustic emission

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