考虑温度和体积应力的分数阶蠕变损伤Burgers模型

doi:10.13722/j.cnki.jrme.2020.0734

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Abstract Salt cavern is an ideal shielding rock for deep storage of oil，natural gas and high-level radioactive nuclear waste. Considering the combined influence of temperature and volume-stress in deep，a damage variable is proposed based on the Weibull distribution of random failure of meso-scale element. The Drucker-Prager criterion is used to describe the brittle failure in the linear deformation at meso-scale，and the generalized Hook's Law considering the plastic damage is introduced to describe the sample-scale damage. As a result，a static constitutive model under triaxial compression is effectively established. Furthermore，introducing both the static constitutive model and the nonlinear fractional viscosity dashpot into Burgers model，a fractional Burgers model with creep damage considering the temperature and the volume stress is effectively established. The results show that the new model，sensitive to the temperature and the volume stress，can well simulate the creep deformation in whole evolution，especially for the accelerated creep deformation.

Key words： rock mechanics full-stage modeling triaxial creep fractional creep Burgers model

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	Articles by authors
	XUE Dongjie1
	2
	LU Lele1
	YI Haiyang3
	WU Zhide4
	ZHANG Qingsen1
	ZHANG Zepeng1

Cite this article:

XUE Dongjie1,2,LU Lele1, et al. A fractional Burgers model for uniaxial and triaxial creep of damaged salt-rock considering temperature and volume-stress[J]. , 2021, 40(2): 315-329.

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http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2020.0734 OR http://rockmech.whrsm.ac.cn/EN/Y2021/V40/I2/315

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