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Effect of Pre-Existing Symmetrical Cracks on Propagation Behaviors of a Blast-Induced Crack
Published 2020-01-01“…Some circular specimens using two kinds of material, PMMA and sandstone, including a center hole charged with a detonator and pre-existing cracks were used in the experiments. …”
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42
Experimental Study on Vibration Reduction Technology of Hole-by-Hole Presplitting Blasting
Published 2021-01-01“…Results show that the effect of precise delay initiation between preholes based on the digital electronic detonator is better than that of the simultaneous initiation of preholes. …”
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43
A Novel Method to Evaluate the Effect of Slope Blasting under Impact Loading
Published 2020-01-01“…The entire evaluation process selects eleven indicators to form an evaluation set, including the boulder yield, root rate, flying distance of flyrock, explosive consumption, postcracking distance, detonator unit consumption, vibration velocity, loose coefficient, cast distance, throw rate, and blasted volume per meter of hole. …”
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Effect of the Preexisting Fissure with Different Fillings in PMMA on Blast-Induced Crack Propagation
Published 2018-01-01“…The experiment of explosive loading was carried out by a single detonator, and the dynamic crack propagation process of the experimental specimens was simulated by nonlinear dynamics software AUTODYN. …”
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Study on the Influence of Initiation Model on the Forming Characteristics of MEFP Warhead
Published 2021-01-01“…For the MEFP warhead of a small-caliber grenade, whether it is center detonation or eccentric detonation, the EFP velocity of multipoint detonation is higher than that of the single-point detonation, the velocity of double-column multipoint eccentric synchronous detonation is 2%–9% higher than that of the single-column single-point (multipoint eccentric synchronous) detonation, the velocity of double-column multipoint eccentric synchronous detonation is 10%–17% higher than that of the central single-point (multipoint synchronous) detonation, and the velocity of single-column single-point (multipoint eccentric synchronous) detonation is 5%–17% higher than that of the central single-point (multipoint synchronous) detonation. …”
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Using Radiogenic Noble Gas Nuclides to Identify and Characterize Rock Fracturing
Published 2025-01-01“…Explosive by‐product gas was observed in multiple locations both near and distal to the shot locations for both detonations. Radiogenic 4He and 40Ar release from rock damage was observed in locations near the detonation after the second, more powerful detonation. …”
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48
A Comparison Investigation on Cylinder Test in Different Ambient Media by Experiment and Numerical Simulation
Published 2020-01-01“…When the detonation reaction occurs after the charge in the warhead is ignited, the propagation of the detonation wave and the expansion of the detonation product will interact with the wrapped metallic shell and cause the shell material to accelerate, extremely deform, and eventually rupture, which is a typical strong fluid-structure interaction problem. …”
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Study on the 2D Optimization Simulation of Complex Five-Hole Cutting Blasting under Different Lateral Pressure Coefficients
Published 2020-01-01“…In order to study the rock-breaking process of complex differential blasting under deep high crustal stress, the instantaneous detonation of each model and the priority detonation of the central hole are numerically simulated. …”
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50
Modeling Blast Loading on Buried Reinforced Concrete Structures with Zapotec
Published 2008-01-01“…A coupled Euler-Lagrange solution approach is used to model the response of a buried reinforced concrete structure subjected to a close-in detonation of a high explosive charge. The coupling algorithm is discussed along with a set of benchmark calculations involving detonations in clay and sand.…”
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Study of the conditions of fracture at explosive compaction of powders
Published 2013-04-01“…Simultaneously, a decrease in the propagation velocity of the detonation wave results in an appreciable shrinkage of this region.…”
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Study of the conditions of fracture at explosive compaction of powders
Published 2013-03-01“…The performed analysis shows that an increase in the decay time of the pressure applied to the sample due to an increase of the explosive thickness or the external loading causes no shrinkage of the destructed region at a fixed propagation velocity of the detonation wave. Simultaneously, a decrease in the propagation velocity of the detonation wave results in an appreciable shrinkage of this region.…”
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EM Database v1.0: A benchmark informatics platform for data-driven discovery of energetic materials
Published 2024-12-01“…., crystal density, enthalpy of sublimation, molar heat of formation, detonation pressure, detonation velocity, detonation heat, and detonation volume) obtained using models of quantitative structure-property relationships. …”
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Experimental Study of Bilinear Initiating System Based on Hard Rock Pile Blasting
Published 2017-01-01“…Furthermore, on the basis of the detonation wave collision theory, frontal collision, oblique reflection, and Mach reflection during detonation wave propagation were studied. …”
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Effect of Aluminum Powder Content on Air Blast Performance of RDX-Based Explosive Grenade Charge
Published 2022-01-01“…The results show that RDX-based aluminized explosives have higher detonation heat, detonation velocity, and detonation volume when the aluminum powder content is 20%, and the shock wave over pressure as well as impulse keep a high level at the same time within 4.5 m. …”
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Characteristics of a New Plastic Explosive Named EPX-1
Published 2015-01-01“…Sensitivities to impact and friction were measured. The detonation velocity was measured experimentally and the detonation characteristics were calculated by EXPLO5 thermodynamic code. …”
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Comprehensive study on impact of hydrogen peroxide decomposition on the crucial parameters of OSM-type energetic materials
Published 2024-06-01“…The main objective of the study was to investigate the various compositions of OSM-type energetic materials in terms of the evolution over time of their energetic properties (including the “raw” energetic material strength and the ability to sustain the propagation of a detonation wave) and the volume of the post-detonation gases. …”
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Study on the LES of Premixed Gas Flame Dynamics in a Weak Confinement Structure: The Influence of Continuous Obstacle Plates
Published 2025-02-01“…In this paper, experimental and simulation methods are combined to investigate the detonation characteristics of propane(C3H8)-air mixtures. …”
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Model for Calculating Seismic Wave Spectrum Excited by Explosive Source
Published 2021-01-01“…The results of using this model show that the main frequency and the bandwidth of the seismic waves caused by the explosion are influenced by the initial detonation pressure, the adiabatic expansion of the explosive, and the geotechnical parameters, which increase with the reduction of initial detonation pressure and the increase of the adiabatic expansion. …”
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Investigation of Shock Initiation in Covered Charges under Shock Wave and Fragment Impacts
Published 2021-01-01“…According to the results, increase in the diameter of covered plates containing a cylindrical notch increased pressed TNT critical detonation distance. When dealing with a covered plate containing a normally reflected frustum notch, however, we figured out that any increase in normal reflection slope could decrease pressed TNT critical detonation distance.…”
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