Sensitivity Analysis and Determination of Some Parameters of the Rock RHT Model

LI Hongchao; WANG Fuqi; ZHANG Ji; LIANG Rui; WEN Yiming

doi:10.11858/gywlxb.20240965

Volume 39 Issue 6

Jun 2025

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Chinese Journal of High Pressure Physics > 2025 > 39(6): 064203.

LI Hongchao, WANG Fuqi, ZHANG Ji, LIANG Rui, WEN Yiming. Sensitivity Analysis and Determination of Some Parameters of the Rock RHT Model[J]. Chinese Journal of High Pressure Physics, 2025, 39(6): 064203. doi: 10.11858/gywlxb.20240965

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LI Hongchao, WANG Fuqi, ZHANG Ji, LIANG Rui, WEN Yiming. Sensitivity Analysis and Determination of Some Parameters of the Rock RHT Model[J]. Chinese Journal of High Pressure Physics, 2025, 39(6): 064203. doi: 10.11858/gywlxb.20240965

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Sensitivity Analysis and Determination of Some Parameters of the Rock RHT Model

doi: 10.11858/gywlxb.20240965

LI Hongchao^{1, 2
,},
WANG Fuqi¹,
ZHANG Ji¹,
LIANG Rui³,
WEN Yiming^{4,*
,
,}

1.
Faculty of Public Safety and Emergency Management, Kunming University of Science and Technology, Kunming 650093, Yunnan, China
2.
Faculty of Urbanism, Kunming University of Science and Technology, Kunming 650051, Yunnan, China
3.
Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China
4.
College of Metallurgy and Mining, Kunming Metallurgy College, Kunming 650033, Yunnan, China

Received Date: 25 Dec 2024
Rev Recd Date: 21 Jan 2025

Available Online: 06 Mar 2025

Issue Publish Date: 05 Jun 2025

Abstract

Abstract

The Riedel-Hiermaier-Thoma (RHT) model is extensively used in the numerical simulation and analysis of phenomena such as explosive impacts and penetration. The accuracy of the simulation results is primarily dependent on the constitutive model and the parameter values used within it. To perform sensitivity analysis and parameter determination for Lode angle correlation coefficient, the tensile yield surface parameter, the reference compressive strain rate, the reference tensile strain rate, the failure compressive strain rate and the failure tensile strain rate in the RHT model for various rock types, LS-DYNA was employed to simulate the projectile penetration into a target and split Hopkinson pressure bar (SHPB) impact tests under single-factor variations. The effects of changes in parameter values on the simulation results were analyzed, followed by an orthogonal test to assess the interaction effects between parameters and determine the optimal parameter values. The results indicate that the sensitivity ranking of the six parameters varies under different operational conditions, and the effects of these parameters on the elastic, linear strengthening, and damage-softening stages of the SHPB impact stress-strain curve were identified. Further orthogonal SHPB impact simulation tests confirm the absence of interaction between these parameters, validating that the single-factor sensitivity analysis results are effective. The optimal values for these parameters in the RHT models of granite, red sandstone, and marble are determined. This finding provides valuable insights for the sensitivity analysis and parameter determination in rock-type RHT models.
- RHT model,
- projectile penetration,
- split Hopkinson pressure bar,
- parameter sensitivity,
- orthogonal test

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References(24)

References

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