Zhou, H.; Liu, D.; Lei, G.; Xue, D.; Zhao, Y. The Creep-Damage Model of Salt Rock Based on Fractional Derivative. Energies2018, 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.
Zhou, H.; Liu, D.; Lei, G.; Xue, D.; Zhao, Y. The Creep-Damage Model of Salt Rock Based on Fractional Derivative. Energies2018, 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.
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.
Keywords
salt rock; creep; damage; fractional derivative; acoustic emission
Subject
Environmental and Earth Sciences, Geophysics and Geology
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
