Theoretical modeling of the dynamic tensile response of Laurentian granite using the dominant crack algorithm

Wu, Bangbiao; Yao, Wei; Xia, Kaiwen

doi:10.1016/j.ijrmms.2019.104077

Cited by 5 publications

(2 citation statements)

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“…According to the statistical damage theory, the damage degree of the specimen is the sum of the defects contained in each microelement, and the probability density relation between the damage variable D and probability density of microelement failure is dD dε � ϕ(ε). (16) After integrating (16) and combining with (3), we get…”

Section: Shock and Vibrationmentioning

confidence: 99%

“…Li et al [15] developed an excess stress model to analyze the dynamic response of rock joints by using the mechanical conceptual models based on the Hooke, the modified Saint-Venant, and the Newton elements. Wu et al [16] conducted the sensitivity analysis of the microscopic parameters in the DCA model; meanwhile, he indicated that the model is valid and applicable to describe the dynamic tensile response and can well predict the dynamic tensile strength of rock-like materials. In engineering practice, rocks are in a complex stress state and occurrence environment in most cases.…”

Section: Introductionmentioning

confidence: 99%

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Study on Dynamic Constitutive Model of Weakly Consolidated Soft Rock in Western China

Wang

Qin

et al. 2020

Shock and Vibration

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To obtain the impact mechanical response and establish the dynamic damage constitutive relationship of frozen sandstone at low temperature conditions, the impact test of Cretaceous red sandstone under different temperatures was conducted using a split Hopkinson pressure bar (SHPB) device. According to the characteristics of the stress-strain curves obtained by the test, a constitutive model considering the damage effect, temperature effect, and strain rate effect was established, which was improved by Zhu–Wang–Tang (Z–W–T) constitutive model. It was proved that the fitting curves of constitutive equation were in good agreement with the test curves. The fluctuation amplitude of fitting error was controlled within ±4 MPa. The physical meaning of each parameter of the constitutive model is clear, and most of them are fixed values. The selection range of variable parameters and the related change rules are confirmed, which improves the practicability of constitutive model. The constitutive equation can well describe the nonlinear features of this kind of frozen sandstone under impact loading. It was also found that the constitutive equation was applicable to express the dynamic mechanical properties of rock-like materials such as hard rock, soft rock, frozen soil, raw coal, and concrete. It can be referred to the parameter determination method in this paper to study and determine the parameters, reduce the difficulty of parameter selection, and improve the practicability of the constitutive model and parameters, so as to guide the engineering practice better.

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Section: Shock and Vibrationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%