基于非线性动态强度准则的岩石动态变形过程统计损伤模拟方法

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Abstract The dynamic strain rate has a great effect on the dynamic deformation process of rocks. Considering the nonlinear effect of dynamic strain rate of rocks on their strength，a nonlinear dynamic strength criterion reflecting the influence of strain rate was developed based on the improvement to the existing dynamic strength criterions of rocks. With the nonlinear dynamic strength criterion proposed and the measurement method of the microelement strength considering the effect of the strain rate of rocks，a dynamic statistical damage constitutive model for rocks was proposed based on the statistical damage theory. A method for determining the model parameters based on the dynamic stress-strain curves from the dynamic triaxial test of rocks was also put forward. A method simulating the dynamic deformation process of rocks was established，which reflect the influence of not only stress state but also strain rate on the dynamic deformation process of rocks. Finally，a comparison between the experimental and theoretical curves of this model and other existing similar models was carried out and the rationality and advantage of the proposed model in this paper were demonstrated.

Key words： rock mechanics nonlinear dynamic strength criterion strain rate statistical damage dynamic constitutive model

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	Articles by authors
	CAO Wengui
	LIN Xingtao
	ZHANG Chao
	YANG Shang

Cite this article:

CAO Wengui,LIN Xingtao,ZHANG Chao, et al. A statistical damage simulation method of dynamic deformation process for rocks based on nonlinear dynamic strength criterion[J]. , 2017, 36(4): 794-802.

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http://www.rockmech.org/EN/Y2017/V36/I4/794

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