A combined normal- and transverse-displacement interferometer with an application to impact of <i>y</i>-cut quartz

Kim, Kyung‐Suk; Clifton, R. J.; Kumar, Prashant

doi:10.1063/1.323448

Cited by 121 publications

(52 citation statements)

References 14 publications

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“…The heterodyne scheme overcomes this challenge by shifting the signal frequency at zero velocity to 1.3 GHz, which enables the accurate determination of normal and transverse particle velocities with nanosecond time resolution [6] and provides automatic, unambiguous detection of velocity reversals. The effective DPDV measurement sensitivity to transverse velocity is controlled by the grating pitch and theoretically equivalent to that of a transverse displacement interferometer (TDI) [7]. The measurement sensitivity to normal velocity is increased by 1.78× compared to the sensitivity of the PDV using the 0 th order (reflected) beam [5].…”

Section: Methodsmentioning

confidence: 99%

Pressure-shear plate impact experiment on soda-lime glass at a pressure of 30 GPa and strain rate of 4·107 s–1

Kettenbeil

Mello

Jiao

et al. 2018

AIP Conference Proceedings

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Abstract. Recent modifications of a powder gun facility at Caltech have enabled pressure-shear plate impact (PSPI) experiments in a regime of pressures and strain rates that were previously unaccessible. A novel heterodyne diffracted beam photonic Doppler velocimeter (DPDV) has also been developed for simultaneous measurement of the normal and transverse particle velocity histories using the ±1 st order diffracted beams produced by a 400 lines/mm diffraction grating deposited onto the polished rear surface of the impacted target plate. We present and interpret the results of a PSPI experiment conducted on a 5 μm thick soda-lime glass sample subjected to a normal stress of 30 GPa and a shear strain rate of 4 · 10 7 s −1 . Transverse particle velocity measurements reveal a peak shear stress level of 1.25 GPa up to a shear strain value of 2.2, followed by a precipitous drop in stress and complete loss of shear strength.

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Section: Methodsmentioning

confidence: 99%

Pressure-shear plate impact experiment on soda-lime glass at a pressure of 30 GPa and strain rate of 4·107 s–1

Kettenbeil

Mello

Jiao

et al. 2018

AIP Conference Proceedings

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“…One approach used has been the normal and transverse displacement interferometer [Kim et al, 1977]. While this approach has some advantages and works well at lower velocities, it is not suited to higher (100's of meters per second) free surface velocities.…”

Section: Instrumentationmentioning

confidence: 99%

Pressure-shear experiments on granular materials.

Reinhart

Thornhill²,

Vogler³

et al. 2011

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Pressure-shear experiments were performed on granular tungsten carbide and sand using a newlyrefurbished slotted barrel gun. The sample is a thin layer of the granular material sandwiched between driver and anvil plates that remain elastic. Because of the obliquity, impact generates both a longitudinal wave, which compresses the sample, and a shear wave that probes the strength of the sample. Laser velocity interferometry is employed to measure the velocity history of the free surface of the anvil. Since the driver and anvil remain elastic, analysis of the results is, in principal, straightforward.Experiments were performed at pressures up to nearly 2 GPa using titanium plates and at higher pressure using zirconium plates. Those done with the titanium plates produced values of shear stress of 0.1-0.2 GPa, with the value increasing with pressure. On the other hand, those experiments conducted with zirconia anvils display results that may be related to slipping at an interface and shear stresses mostly at 0.1 GPa or less. Recovered samples display much greater particle fracture than is observed in planar loading, suggesting that shearing is a very effective mechanism for comminution of the grains.3

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“…The normal velocity is typically measured with a normal displacement interferometer (NDI) which requires a reflective surface. The transverse wave is measured using a transverse displacement interferometer (TDI) and requires a diffraction grating in order to measure the shear waves [5].…”

Section: Sample Preparationmentioning

confidence: 99%

Plasticity at High Pressures and Strain Rates Using Oblique-Impact Isentropic-Compression Experiments

Florando

Jiao

Grunschel

et al. 2010

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Part of LLNL's national security mission is reliant on accurate simulations of high strain-rate plastic flow (nonreversible deformation) under conditions of high hydrostatic pressures. In an effort to help advance the predictive capability of LLNL's multiscale modeling program a new experimental technique has been developed to provide strength properties under conditions of high strain rate (10 4 -10 6 s -1 ) and high hydrostatic pressure (1-100 GPa). The oblique-impact experiments allow for the shearing response of the material to be independently measured while the material is under pressure. The strength of the material is then inferred by conducting 2-D hydrodynamic simulations to match to the experimentally measured velocity profiles. Utilizing this technique, Cu and V experiments have been conducted that establish the utility of this technique to measure strength under dynamic conditions.

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A combined normal- and transverse-displacement interferometer with an application to impact of y-cut quartz

Cited by 121 publications

References 14 publications

Pressure-shear plate impact experiment on soda-lime glass at a pressure of 30 GPa and strain rate of 4·107 s–1

Pressure-shear plate impact experiment on soda-lime glass at a pressure of 30 GPa and strain rate of 4·107 s–1

Pressure-shear experiments on granular materials.

Plasticity at High Pressures and Strain Rates Using Oblique-Impact Isentropic-Compression Experiments

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