Dynamic Response of Rock-like Materials Based on SHPB Pulse Waveform Characteristics

Sun, Bi; Chen, Rui; Yang, Ping; Zhu, Zhende; Wu, Nan; He, Yanxin

doi:10.3390/ma15010210

Cited by 16 publications

(4 citation statements)

References 54 publications

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“…To better understand the influence of strain rate on damage evolution, K D . ε α is used as the coefficient for damage evolution of Equation (15). Figure 18b shows that the coefficient in the equation decreases with increasing strain rate, and the higher the strain rate, the slower the rate of damage decrease.…”

Section: Damage Evolution Equationmentioning

confidence: 99%

“…The effects of different pulse types and pulse waveforms on the incident waveform and dynamic response characteristics of the specimens were discussed based on the particle flow code. The study determines the critical interval of the dynamic strength of the rock, in which the dynamic strength of the specimen is independent of the strain rate but increases with the amplitude of the incident stress wave [15]. The freeze-thaw damage to granite under impact loading was studied using SHPB tests and numerical simulations [16].…”

Section: Introductionmentioning

confidence: 99%

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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: Damage Evolution Equationmentioning

confidence: 99%

Section: Introductionmentioning

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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“…Luo et al [ 22 ] developed a numerical model of an SHPB using PFC software to analyze the dynamic mechanical properties and damage modes of sandstone in terms of fine fractures and energy. Similarly, Zhu et al [ 23 , 24 , 25 ] used the PFC software to investigate the microscopic fracture evolution patterns of rocks under dynamic impact.…”

Section: Introductionmentioning

confidence: 99%

Study on Damage Characteristics and Failure Modes of Gypsum Rock under Dynamic Impact Load

Ren

Zhang

et al. 2023

Materials

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The objective of this work was to investigate the damage characteristics and failure modes of gypsum rock under dynamic impact loading. Split Hopkinson pressure bar (SHPB) tests were performed under different strain rates. The strain rate effects on the dynamic peak strength, dynamic elastic modulus, energy density, and crushing size of gypsum rock were analyzed. A numerical model of the SHPB was established using the finite element software, ANSYS 19.0, and its reliability was verified by comparing it to laboratory test results. The results showed that the dynamic peak strength and energy consumption density of gypsum rock increased exponentially with strain rate, and the crushing size decreased exponentially with the strain rate, both findings exhibited an obvious correlation. The dynamic elastic modulus was larger than the static elastic modulus, but did not show a significant correlation. Gypsum rock fracture can be divided into crack compaction, crack initiation, crack propagation, and breaking stages, and is dominated by splitting failure. With increasing strain rate, the interaction between cracks is noticeable, and the failure mode changes from splitting to crushing failure. These results provide theoretical support for improvements of the refinement process in gypsum mines.

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“…Now, PFC has become an important tool for the study of granular materials. It has been widely used in mining, geotechnical engineering and many other fields [ 34 , 35 , 36 , 37 , 38 , 39 , 40 ].…”

Section: Introductionmentioning

confidence: 99%

Study on Axial Tensile Strain Rate Effect on Concrete Based on Experimental Investigation and Numerical Simulation

et al. 2022

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The material of concrete is a three-phase composite material composed of an aggregate, a mortar and an interface transition zone (ITZ). Based on this characteristic, the axial tensile test of mortar, the interface and concrete specimens under intermediate strain rate was carried out in this paper. The sensitivity of these three materials to strain rate was compared and analyzed. The numerical simulation of the axial tension of the concrete materials was studied. The following conclusions are drawn: in the axial tension test, the rate of sensitivity of the specimen interface is the strongest. With the increase in strain rate, the tensile strength and elastic modulus of concrete specimens increase but the effect of the ITZ decreases. The low tensile strength of the ITZ leads to its failure in concrete. The parallel bond strain energy and the dissipated energy of specimens increase with the strain rate. When the strain rate is higher (greater than 1 × 10−2), the increase rate of the dissipated energy is greater than that of the parallel bond strain energy. The results of this research can provide the corresponding basis for the safety evaluation and the stability analysis of concrete engineering in the range of intermediate strain rate.

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Dynamic Response of Rock-like Materials Based on SHPB Pulse Waveform Characteristics

Cited by 16 publications

References 54 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

Study on Damage Characteristics and Failure Modes of Gypsum Rock under Dynamic Impact Load

Study on Axial Tensile Strain Rate Effect on Concrete Based on Experimental Investigation and Numerical Simulation

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