A modified JH2 model with improved strength model, damage evolution, and equation of state for rock under impact and blasting loads

Shu, Yun; Zhu, Zheming; Wang, Meng; Wang, Fei; Li, Ren; Li, Yaojia

doi:10.1016/j.mechmat.2022.104454

Cited by 11 publications

(3 citation statements)

References 35 publications

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“…For the UT test, the JH-2 constitutive model predicted elastic-perfectly plastic behavior, which is unphysical and not consistent with a proper response of brittle material under tension. This issue has been reported by several scholars 58,75 and is one of the drawbacks of the JH-2 model. The remedy of this can be the application of user-defined models, which require implementing subroutine procedures 52,57,58 .…”

Section: Single-element Testsmentioning

confidence: 90%

“…This issue has been reported by several scholars 58,75 and is one of the drawbacks of the JH-2 model. The remedy of this can be the application of user-defined models, which require implementing subroutine procedures 52,57,58 . Parallel studies demonstrated that by adding a very small shearing in the UT test the correct response of the material can be obtained.…”

Section: Single-element Testsmentioning

confidence: 90%

“…The JH-2 model has incorrectly implemented tensile damage in a pure tension, which was also noted in the present paper. To overcome these limitations, user-defined modifications of the model can be introduced 52,57,58 .…”

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confidence: 99%

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JH-2 constitutive model of sandstone for dynamic problems

Baranowski,

Kucewicz,

Janiszewski

2024

Sci Rep

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This paper demonstrates the application of the Johnson–Holmquist II (JH-2) model with correlated and validated parameters to simulate the behavior of a sandstone. The JH-2 model is used to simulate various tests, including single-element tests, structural quasi-static uniaxial and triaxial compression tests, and the split Hopkinson pressure bar test. Additionally, the model is used to simulate drop-weight impact test using a ball bearing and two loading scenarios involving small-scale blasting and projectile impacts. Quantitative and qualitative comparisons demonstrate that the JH-2 model agrees well with both experimental and analytical results. Limitations of the model are also highlighted, particularly for quasi-static problems, as the model was originally developed for high-strain-rate simulations. Ultimately, this study demonstrates that the JH-2 rock constitutive model can obtain reasonable results for a material other than the material for which the model was originally correlated and validated. This paper provides valuable guidance for modeling and simulating sandstone and other rock materials subjected to dynamic loadings.

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