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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摘要

Johnson-Holmquist(J-H)本构模型被普遍用于研究岩石动态破坏过程，但由于包含参数较多，确定参数需要大量试验，J-H本构模型描述岩石类的动态力学性质缺乏准确可信的模型参数。为此开展致密砂岩的三轴静态和三轴动态岩石力学试验，依据试验结果探讨J-H损伤本构模型参数求取方法，给出四川须家河组致密砂岩J-H本构模型参数及取值范围，利用所取参数及AUTODYN软件模拟不同围压下致密砂岩的split Hopkinson pressure bar(SHPB)试验过程，结果显示，试验和数值模拟的应力波曲线吻合较好，模拟得到的动态应力–应变曲线与试验结果的平均误差为14.31%，验证了模型参数的准确性。

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	石祥超1
	陶祖文1
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	孟英峰1
	蔡武强1
	李皋1
	刘力1

关键词 ：岩石力学, 致密砂岩, SHPB试验, Johnson-Holmquist损伤本构模型, AUTODYN

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

引用本文:

石祥超1，陶祖文1，2，孟英峰1，蔡武强1，李皋1，刘力1. 致密砂岩Johnson-Holmquist损伤本构模型参数求取及验证[J]. 岩石力学与工程学报, 2015, 34(S2): 3750-3758.
SHI Xiangchao1，TAO Zuwen1，2，MENG Yingfeng1，CAI Wuqiang1，LI Gao1，LIU li1. CALCULATION AND VERIFICATION FOR JOHNSON-HOLMQUIST CONSTITUTIVE MODEL PARAMETERS OF TIGHT SANDSTONE. , 2015, 34(S2): 3750-3758.

链接本文:

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

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