Study on dynamic mechanical properties and constitutive model of granite under constant strain rate loading

Hou, Shijun; Liang, Shufeng; Liu, Dianshu

doi:10.1016/j.conbuildmat.2022.129975

Cited by 11 publications

(1 citation statement)

References 27 publications

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“…ε, and the damage evolution under dynamic loading can be regarded as a stress-promoted, thermally activated process [31]. Assuming the existence of a strain threshold ε 0 , no damage occurs when the peak strain is less than the threshold, and when the peak strain is greater than or equal to the threshold, the damage evolution is a thermally activated process, and the dynamic damage evolution equation for granite is:…”

Section: Constitutive Model 41 Zwt Improvement To Constitutive Modelmentioning

confidence: 99%

Dynamic Mechanical Properties and Damage Evolution Characteristics of Beishan Deep Granite under Medium and High Strain Rates

Hui

Pan

et al. 2023

Materials

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To study the dynamic mechanical properties and damage evolution mechanism of Beishan deep granite under medium and high strain rates, dynamic mechanical tests for the deep granite specimens with different strain rates were conducted using the split Hopkinson pressure bar (SHPB) device. The improved Zhu–Wang–ang (ZWT) dynamic constitutive model was established, and the relationship between strain rate and strain energy was investigated. The test results show that the strain rate in the dynamic load test is closer to the strain rate in the rock blasting state when the uniaxial SHPB test is applied to the granite specimens in a low ground stress state. Peak stress has a linear correlation with strain rate, and the dynamic deformation modulus of the Beishan granite is 152.58 GPa. The dissipation energy per unit volume and the energy ratio increase along with the strain rate, whereas the dissipation energy per unit volume increases exponentially along with the strain rate. There is a consistent relationship between the damage degree of granite specimens and the dissipation energy per unit volume, which correspond to one another, but there is no one-to-one correspondence between the damage degree of granite specimens and the strain rate. To consider the damage and obtain the damage discount factor for the principal structure model, the principal structure of the element combination model was improved and simplified using the ZWT dynamic constitutive model. The change of damage parameters with strain rate and strain was obtained, and the dynamic damage evolution equation of Beishan granite was established by considering the damage threshold.

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Section: Constitutive Model 41 Zwt Improvement To Constitutive Modelmentioning

confidence: 99%

Dynamic Mechanical Properties and Damage Evolution Characteristics of Beishan Deep Granite under Medium and High Strain Rates

Hui

Pan

et al. 2023

Materials

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Dynamic Mechanical Properties and Constitutive Model of Coal Rock Under Direct Tension

Zhou,

Ren,

Xie

et al. 2024

Rock Mech Rock Eng

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Experimental study on multiple propagation characteristics of stress wave and surface displacement behavior in coal based on SHPB and DIC

Li¹,

Zhao²,

Liu³

et al. 2023

Bull Eng Geol Environ

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Study on dynamic mechanical properties and constitutive model of granite under constant strain rate loading

Cited by 11 publications

References 27 publications

Dynamic Mechanical Properties and Damage Evolution Characteristics of Beishan Deep Granite under Medium and High Strain Rates

Dynamic Mechanical Properties and Damage Evolution Characteristics of Beishan Deep Granite under Medium and High Strain Rates

Dynamic Mechanical Properties and Constitutive Model of Coal Rock Under Direct Tension

Experimental study on multiple propagation characteristics of stress wave and surface displacement behavior in coal based on SHPB and DIC

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