Damage Evaluation and Statistic Constitutive Model of High-Temperature Granites Subjected to Liquid Nitrogen Cold Shock

Chen, Zhiheng; Sha, Song; Xu, Lida; Quan, Junsong; Guan, Rong; Jiang, Maiyong

doi:10.1007/s00603-022-02779-x

Cited by 17 publications

(2 citation statements)

References 60 publications

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“…The reason is that, under high-temperature conditions, the thermal motion of rock molecules is intensified, and the thermal expansion coefficients of various mineral particles composed of granite are different, resulting in a large number of thermal cracks. With the increase in temperature, these thermal cracks gradually spread through the interior of the rock, the deterioration degree of the rock gradually increases, and the peak strength value decreases [44][45][46]. The initial thermal damage value of the rock is coupled with the mechanical damage [47,48].…”

Section: The Damage Constitutive Model Under a Thermo-mechanical Coup...mentioning

confidence: 99%

Study of Rock Damage Constitutive Model Considering Temperature Effect Based on Weibull Distribution

Lu,

Wu,

Yin

et al. 2024

Applied Sciences

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The deformation and damage process of rocks is accompanied by crack extension and penetration. The rock strength criterion, as a macroscopic characterization of the rock strength microelement, is the basis for establishing the damage constitutive modeling of rock. Aiming at the problem of the Hoek–Brown (H–B) strength criterion having a large strength prediction value under high confining pressure, the H–B strength criterion is corrected by considering the influence of the initial cracks on the development of the rock strength, and its applicability is verified. Based on the damage theory, assuming that the rock strength microelement obeys the Weibull distribution and considering the influence of residual strength, the damage correction coefficient is introduced, and a thermal damage statistical constitutive model that can reflect the whole process of the development of initial cracks inside the rock is established. The degree of penetration up to the damage is established, and the method of determining the parameters of the model is given. The theoretical curves of the established model are compared and analyzed with the curves of a conventional triaxial compression test of rock samples, and the study shows that the statistical constitutive model of the thermal damage of rock, established based on the modified H–B strength criterion, can better simulate the stress–strain relationship of rock under a conventional triaxial test. It also verifies the reasonableness and applicability of the model, which is expected to provide a basis for the exploitation of deep resources and the safety assessment of underground engineering.

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Section: The Damage Constitutive Model Under a Thermo-mechanical Coup...mentioning

confidence: 99%

Study of Rock Damage Constitutive Model Considering Temperature Effect Based on Weibull Distribution

Lu,

Wu,

Yin

et al. 2024

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…Tang et al [ 19 ] investigated the effect of temperature on the basic friction angle of granite cracks under water and liquid nitrogen cooling methods, different specimen sizes and tilt rates. Shao et al [ 20 ] and Chen et al [ 21 ] investigated the physical and mechanical damage characteristics of granite at different high temperatures under the effect of liquid nitrogen cooling. Guan et al [ 22 ] studied the damage characteristics of granite specimens and their mechanisms after different heating-cooling cycles using air-cooling and liquid nitrogen cooling.…”

Section: Introductionmentioning

confidence: 99%

Study on the Evolution of Physical Parameters and Dynamic Compression Mechanical Properties of Granite after Different Heating and Cooling Cycles

Zhang

Huang

et al. 2023

Materials

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The study of the evolution law of basic physical parameters and dynamic compression performance of deep granite under the environment of the heating-cooling cycle is of great significance for the stability evaluation of deep underground engineering and the development of deep resources. In this study, heating-cooling cycle tests and dynamic compression tests were conducted on a large number of fine-grained granite specimens with heating temperatures from 200 to 600 °C and times from one to twenty times using a box-type high-temperature muffle furnace and Hopkinson pressure bar (SHPB) test system, and the evolution law of basic physical parameters and dynamic compression mechanical properties of fine-grained granite were studied using theoretical and fitting analysis. The test results showed that: the changes of the basic physical parameters of granite have obvious temperature effect; 600 °C is a threshold value for the changes of each physical parameter of granite; the sensitivity of each physical parameter to the number of heating and cooling cycles is small before 600 °C; and the sensitivity of each physical parameter to the number of heating and cooling cycles significantly increases at 600 °C. The dynamic compressive strength and elastic modulus of granite decreased with the increase in heating and cooling cycles, and the maximum decrease rate was 89.1% and 85.9%, respectively, and the strain rate linearly increased with the increase in heating and cooling cycles, and the maximum strain rate was 123 s−1. The temperature, the number of heating and cooling cycles, and the impact air pressure, all had significant effects on the damage mode and crushing degree of granite.

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The Effect of Grain Size Heterogeneity on Mechanical and Microcracking Behavior of Pre-heated Lac du Bonnet Granite Using a Grain-Based Model

Xie

et al. 2023

Rock Mech Rock Eng

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Damage Evaluation and Statistic Constitutive Model of High-Temperature Granites Subjected to Liquid Nitrogen Cold Shock

Cited by 17 publications

References 60 publications

Study of Rock Damage Constitutive Model Considering Temperature Effect Based on Weibull Distribution

Study of Rock Damage Constitutive Model Considering Temperature Effect Based on Weibull Distribution

Study on the Evolution of Physical Parameters and Dynamic Compression Mechanical Properties of Granite after Different Heating and Cooling Cycles

The Effect of Grain Size Heterogeneity on Mechanical and Microcracking Behavior of Pre-heated Lac du Bonnet Granite Using a Grain-Based Model

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