High Strain-Rate Characterization of Deccan Trap Rocks Using SHPB Device

Mishra, SK; Chakraborty, Tanusree; Matsagar, Vasant; Loukus, Josh; Bekkala, Brady

doi:10.1061/(asce)mt.1943-5533.0002229

Cited by 23 publications

(10 citation statements)

References 42 publications

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“…SHPB is a common device to characterize dynamic properties of material with strain rate value between 102 s-1 and 104 s-1. SHPB setup typically consists of incidence bar, transmitted bar and striker bar [13]. Specimen will be sandwiched between incidence and transmitted bar.…”

Section: Split Hopkinson Pressure Bar (Shpb) Theorymentioning

confidence: 99%

“…All these 3 strain pulses will be recorded using strain gauges. Assuming that stress equilibrium and uniform deformation during the event, the transmitted strain pulse is equal to summation of incidence strain pulse and reflected strain pulse [13]. The strain rate, strain and stress of the specimen can be determined by those equations.…”

Section: Split Hopkinson Pressure Bar (Shpb) Theorymentioning

confidence: 99%

See 1 more Smart Citation

Energy Absorption at High Strain Rate of Magnesium Alloy AZ31B

Mubasyir¹,

Abdullah²,

Ahmad³

et al. 2020

IJIE

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This paper presents the efficient energy absorption of magnesium alloy AZ31B with reinforcement carbon nanotubes (CNT) and lead (Pb). The high specific energy absorption demonstrated by CNT compared to metals is one of the criteria to improve the AZ31B performance against ballistic penetration. More ductility by adding Pb in the alloy also plays a vital role to increase the energy absorption capability. Four-cylinder shape AZ31B-based specimens are tested dynamically by using compression Split Hopkinson Pressure Bar (SHPB). The diameter and thickness of the specimen is 18 mm and 12.5 mm respectively. The striking velocity used in this work is 20 m/s. By equation of 1D wave propagation, stress-strain curve is plotted and the area under the curve is equivalent to energy absorption. The highest energy absorption is about 270 kJ with the increment of 47% compared to original AZ31B. This increment is consistent with the higher strain rate experienced by the specimen during the test. The strain rate determined from the study is 1300 per second compared to original AZ31B of 850 per second. The finding of this paper is the presence of CNT and lead could improve the energy absorption performance as the strain rate of the specimen also increased.

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Section: Split Hopkinson Pressure Bar (Shpb) Theorymentioning

confidence: 99%

Section: Split Hopkinson Pressure Bar (Shpb) Theorymentioning

confidence: 99%

Energy Absorption at High Strain Rate of Magnesium Alloy AZ31B

Mubasyir¹,

Abdullah²,

Ahmad³

et al. 2020

IJIE

View full text Add to dashboard Cite

show abstract

“…Coal and rock masses are mainly compressed and sheared under static loading [9][10][11][12][13][14]. e split-Hopkinson pressure bar (SHPB) is the main experimental device that is used to explore the mechanism of coal mass dynamic damage [15][16][17]. Feng et al [18] conducted dynamic loading tests on coal using an SHPB system, and the mechanism of energy dissipation was discussed based on the fracture processes of coal under dynamic loads.…”

Section: Introductionmentioning

confidence: 99%

Study on the Dynamic Response Characteristics of Cylindrical Coal-Rock Samples under Dynamic Loads

Zhu

Fang

Zhang

et al. 2020

Shock and Vibration

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To research the dynamic response characteristics of cylindrical coal-rock samples under impact loads, the impact of rigid bars on cylindrical coal-rock samples is simulated under different speed conditions, based on LS-DYNA software, and the dynamic distribution characteristics of the stress, strain, and energy of cylindrical coal-rock samples are analyzed. The results demonstrated the following: (1) the cylindrical coal-rock sample failed at the center first, and the damage developed downward along the axial direction. (2) The critical effective stress and strain have an exponential function relationship with the velocity, and the critical time has a linear relationship with the velocity. (3) The energy change law of the cylindrical coal-rock sample is consistent with the destruction morphology. (4) The axial stress peaks in the severe damage part have a linear relationship with the speed, the axial stress attenuates rapidly after passing the stress yield point, and the axial strain does not increase continuously. (5) The peaks stress and strain on the central axis and the radial line obey the power function distribution, the axial stress produces tensile stress in the axial propagation direction, and the axial stress and strain peaks at the same position are larger than those of the radial stress and strain peaks. This research provides a reference for studying coal and rock dynamic disasters.

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“…However, the dynamic response of rock has recently attracted much attention, with a particular focus on the seismic response of rock tunnels [1,2], the vibration signs (single force inversion and waveform fitness) of a slope on the verge of instability and the subsequently seismic characteristics that are produced by the collapse process [3,4], and the seismic impacts on the stability of rock wedges [5,6]. Rock dynamics have become an emerging science [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Response of Rock Containing Regular Sawteeth Joints under Various Loading Rates and Angles of Application

Shu

Lin

et al. 2020

Applied Sciences

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Intact rock-like specimens and specimens that include a single planar joint or triangular sawteeth joint at various angles are prepared for split Hopkinson pressure bar (SHPB) testing at loading rates of 303.1–5233.6 GPa/s. Only results that are associated with an error (eε) of less than 20.0% are utilized in subsequent analyses. The effects of the loading rate and angle of the load applied to various joint patterns on the failure type and dynamic peak stresses/strength of the specimens are investigated. Experimental results demonstrate that failure of each specimen can be classified into the following four types, Type A: integrated with or without tiny flake-off, Type B: slide failure, Type C: fracture failure, and Type D: crushing failure. The results of statistical analysis of variance (ANOVA) indicate that the loading rate, the angles of the base plane (β), and the asperity (α) of the sawteeth joint of the specimen all affect its dynamic peak stress when fracture failure occurs. The loading rate and β are important when the slide failure occurs, and the loading rate is the sole factor that significantly influences its dynamic peak stress when the specimen is crushed to failure. The dynamic peak stress of the specimen increases with the loading rate, while the rate of increase gradually decreases. The β and α of a jointed specimen affect the location of stress concentration during loading, further influencing the dynamic peak stress of such a specimen under slide and fracture failure. When the loading rate is high and the specimen is crushed to failure, the influences of β and α disappear, and the increase of loading rate reduces the efficiency of raising the dynamic peak stress.

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High Strain-Rate Characterization of Deccan Trap Rocks Using SHPB Device

Cited by 23 publications

References 42 publications

Energy Absorption at High Strain Rate of Magnesium Alloy AZ31B

Energy Absorption at High Strain Rate of Magnesium Alloy AZ31B

Study on the Dynamic Response Characteristics of Cylindrical Coal-Rock Samples under Dynamic Loads

Dynamic Response of Rock Containing Regular Sawteeth Joints under Various Loading Rates and Angles of Application

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