致密砂岩Johnson-Holmquist损伤本构模型参数求取及验证

doi:10.13722/j.cnki.jrme.2015.0515

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Abstract

Johnson-Holmquist(J-H) constitutive model has been widely used to study the dynamic failure process of rock. But for the reason that J-H constitutive model contains many parameters and determining these parameters requires a lot of experiments，J-H constitutive model for describing the dynamic mechanical properties of rocks is lack of accurate and reliable model parameters. The triaxial static and dynamic rock mechanics test of the tight sandstone were carried out，and the mothed of determining J-H model parameters was discussed. The parameters and parameters range of tight sandstone from Xujiahe formation of Sichuan basin were determined. The parameters were used in the AUTODYN software to simulate the failure process of rock in split Hopkinson pressure bar(SHPB) test. The results show that the tress wave curves form test and numerical simulation are in good agreement. The average error of the dynamic stress-strain curves between simulation and test results is 14.31%，and so the accuracy of the model parameters is verified.

Key words： rock mechanics tight sandstone split Hopkinson pressure bar(SHPB) test Johnson-Holmquist damage constitutive model AUTODYN

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	Articles by authors
	SHI Xiangchao1
	TAO Zuwen1
	2
	MENG Yingfeng1
	CAI Wuqiang1
	LI Gao1
	LIU li1

Cite this article:

SHI Xiangchao1,TAO Zuwen1,2, et al. CALCULATION AND VERIFICATION FOR JOHNSON-HOLMQUIST CONSTITUTIVE MODEL PARAMETERS OF TIGHT SANDSTONE[J]. , 2015, 34(S2): 3750-3758.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2015.0515 OR https://rockmech.whrsm.ac.cn/EN/Y2015/V34/IS2/3750

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