Unsupported shock wave induced dynamic fragmentation of matrix in lead with surface grooves

Wang, Jianan; Wu, FengChao; Zhu, YinBo; He, An-Min; Wang, Pei; Wu, HengAn

doi:10.1016/j.commatsci.2018.10.018

Cited by 14 publications

(4 citation statements)

References 49 publications

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“…By contrast, the originally proposed method to quantitatively estimate strength used the total integrated spike growth as the experimental metric, but that method was based on calculations for a general RMI configuration with a perturbed interface between two materials [18]. In our more limiting case with perturbations on the free surface, local interactions of release waves from the perturbed surface eventually result in tensile stresses leading to damage in the form of porosity for a ductile metal [38,39]. In previous work, it was demonstrated that the peak spike velocity occurred early enough to be unaffected by porosity, and it still has excellent sensitivity to strength; hence it makes an ideal metric [22].…”

Section: Analysis Approach and Modelingmentioning

confidence: 99%

Tantalum strength at extreme strain rates from impact-driven Richtmyer-Meshkov instabilities

et al. 2019

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Recently, Richtmyer-Meshkov instability (RMI) experiments driven by high explosives and fielded with perturbations on a free surface have been used to study strength at extreme strain rates and near zero pressure. The RMI experiments reported here used impact loading, which is experimentally simpler, more accurate to analyze, and which also allows the exploration of a wider range of conditions. Three experiments were performed on tantalum at shock stresses from 20 to 34 GPa, with six different perturbation sizes at each shock level, making this the most comprehensive set of strength-focused RMI experiments reported to date on any material. The resulting estimated average strengths of 1200-1400 MPa at strain rates of 10 7 /s exceeded, by 40% or more, a common power law extrapolation from data at strain rates below 10 4 /s. Taken together with other data in the literature that show much higher strength at simultaneous high rates and high pressure, these RMI data isolated effects and indicated that, in the range of conditions examined, the pressure effects are more significant than rate effects.

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Section: Analysis Approach and Modelingmentioning

confidence: 99%

Tantalum strength at extreme strain rates from impact-driven Richtmyer-Meshkov instabilities

et al. 2019

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“…The complex phenomenon has attracted wide attention since its discovery [7,8], due to the importance in shock compression science and technology, such as inertial confinement fusion. The existing studies have shown that the microjet formation depends on various factors, including surface defects [2,9], shock profile and pressure [10][11][12], and material properties [13,14].…”

Section: Introductionmentioning

confidence: 99%

“…Theoretically, Piriz et al [23] proposed an analytical model based on the linear Richtmyer-Meshkov instability (RMI) in solids under the conditions of high-energy-density, and showed that plasticity determined the maximum perturbation amplitude and provides simple scaling laws. Besides, molecular dynamics (MD) [1,12,24,25], Eulerian [14,26,27], and smoothed particle hydrodynamics (SPH) [28][29][30] methods have all been used to simulate the microjet formation. Dimonte et al [31] described a simple algebraic model for the microjet based on the hydrodynamics and MD simulations of the RMI.…”

Section: Introductionmentioning

confidence: 99%

“…Besides, Wang et al [28,34] discussed the dependence of microjet on the shock wave front with SPH simulations. The systematic understanding of the microjet induced by supported shock has been achieved, but the influence of shock profile on microjet is still lack of pertinent research and only a few comparisons of the triangular waves and supported waves reported [12,28,33].…”

Section: Introductionmentioning

confidence: 99%

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Microjet formation from the grooved surface of aluminum under shock waves with different pulse durations

Mingyang

Song

Shao

et al. 2020

Modelling Simul. Mater. Sci. Eng.

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The shock-induced microjet phenomenon has attracted much attention due to its importance in shock compression science and technology. The existing researches have shown that shockwave profile has a significant effect on the microjet formation. This work investigates the influence of shock pulse duration on the microjet systematically based on smoothed particle hydrodynamics simulations and theoretical analysis. In fact, when the pulse duration of shock wave is more than 7.31 times the time of shock front passing through groove, the microjet mass and its time-space evolution will be consistent with the case under supported shock. It is shown that there is a critical value for the shock pulse duration (about 4.21 times the time of shock front passing through groove), below which the effect of shock pulse duration is distinct. With decreasing the shock pulse duration, the mass from spike to bubble experiences a rapid increase due to the increase of the velocity gradient behind the free surface, while the mass from spike to the theoretical free surface experiences a gradual reduction because the shock energy reduces. As a result, the spike becomes very thinner and the bubble amplitude is lengthened. The damage will be localized around the groove region. Besides, with the interaction between the release stage of incident waves and the release waves from the groove, the cavities and different low-density fragments are observed.

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Numerical and experimental study of the second ejection from a grooved tin surface under laser-driven shock loading

Liu

Zhou

et al. 2022

International Journal of Impact Engineering

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Unsupported shock wave induced dynamic fragmentation of matrix in lead with surface grooves

Cited by 14 publications

References 49 publications

Tantalum strength at extreme strain rates from impact-driven Richtmyer-Meshkov instabilities

Tantalum strength at extreme strain rates from impact-driven Richtmyer-Meshkov instabilities

Microjet formation from the grooved surface of aluminum under shock waves with different pulse durations

Numerical and experimental study of the second ejection from a grooved tin surface under laser-driven shock loading

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