Microscale Analysis of Stress Wave Propagation Through Plastic Bonded Explosives Under Micro-Sphere Shock Impact

Dhiman, Abhijeet; Olokun, Ayotomi; Tomar, Vikas

doi:10.1007/s40870-021-00290-y

Cited by 8 publications

(6 citation statements)

References 42 publications

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“…In this work, the high-velocity impact is produced using a laser-based projectile launch setup. The laser-based projectile launch system used in this work is a modified version of the system used in previous work 2 , 33 , 46 . The details of modifications are included in the supplementary datasheet.…”

Section: Experiments Methodsmentioning

confidence: 99%

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Thermo-mechanical behavior measurement of polymer-bonded sugar under shock compression using in-situ time-resolved Raman spectroscopy

Dhiman

Lewis

Olokun

et al. 2022

Sci Rep

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Quantitative information regarding the local behavior of interfaces in an inhomogeneous material during shock loading is limited due to challenges associated with time and spatial resolution. This paper reports the development of a novel method for in-situ measurement of the thermo-mechanical response of polymer bonded sugar composite where measurements are performed during propagagtion of shock wave in sucrose crystal through polydimethylsiloxane binder. The time-resolved measurements were performed with 5 ns resolution providing an estimation on local pressure, temperature, strain rate, and local shock viscosity. The experiments were performed at two different impact velocities to induce shock pressure of 4.26 GPa and 2.22 GPa and strain rate greater than 106/s. The results show the solid to the liquid phase transition of sucrose under shock compression. The results are discussed with the help of fractography analyses of sucrose crystal in order to obtain insights into the underlying heat generation mechanism.

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Section: Experiments Methodsmentioning

confidence: 99%

“…The use of Raman spectroscopy for characterizing shock behavior has been explored by many researchers in the past 3 , 8 , 9 , 32 . In our previous work 2 , shock stress at the HMX-HTPB interface using time-gated Raman spectroscopy was measured. Also, a change in Raman spectra was observed for sucrose under shock compression 33 .…”

Section: Introductionmentioning

confidence: 99%

Thermo-mechanical behavior measurement of polymer-bonded sugar under shock compression using in-situ time-resolved Raman spectroscopy

Dhiman

Lewis

Olokun

et al. 2022

Sci Rep

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“…The spectrum between 620.2 nm to 635.96 nm was collected with a resolution of 0.03 nm and 0.78 cm -1 resolution on Raman shift. The Raman spectra were collected from a 22 μm region [2] close to the leading interface on sugar crystal as shown in Fig. 2a.…”

Section: Experiments Methodsmentioning

confidence: 99%

“…The time synchronization between the 532 nm Raman laser, 1064 nm flyer launch laser, and streak scope was obtained based on the time delay between flyer launch and flyer impact observed on the PDV spectrograph. A schematic of the experimental apparatus is similar to used before [2] with some modification and is shown in Fig. 1b.…”

Section: Experiments Methodsmentioning

confidence: 99%

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Local Shock Properties Measurement Using Time-Resolved Raman Spectroscopy

et al. 2021

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In this article, the dynamic response of a heterogeneous microstructure of polymer bonded composite was analyzed to a short duration shock pulse. The composite microstructure studied is a polymerbonded sugar (PBS) with single-crystal sucrose embedded inside the polydimethylsiloxane binder. The shock pulse was created by the impact of the aluminum disk at high speeds using a laser-based projectile launch system. The mechanical response on the microscale domain was measured using ultrafast time-resolved Raman spectroscopy. The in-situ analysis of the change in Raman spectra from PBS during shock compression was captured in the time domain using a streak camera. The results show a steeply rising shock front after the impact where the shock pressure rise time was estimated from the time-resolved Raman spectra. The viscoplastic behavior in the local microscale domain was characterized by quantifying effective shock viscosity measured in the vicinity of the crystal-binder interface.

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Visualizing Shock Induced Thermo-Mechanical Change at Bi-Crystal Interface Using Laser Array Based Nano-Second Raman Spectral Imaging

Dhiman

Dillard²,

Ehler³

et al. 2023

J. dynamic behavior mater.

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Microscale Analysis of Stress Wave Propagation Through Plastic Bonded Explosives Under Micro-Sphere Shock Impact

Cited by 8 publications

References 42 publications

Thermo-mechanical behavior measurement of polymer-bonded sugar under shock compression using in-situ time-resolved Raman spectroscopy

Thermo-mechanical behavior measurement of polymer-bonded sugar under shock compression using in-situ time-resolved Raman spectroscopy

Local Shock Properties Measurement Using Time-Resolved Raman Spectroscopy

Visualizing Shock Induced Thermo-Mechanical Change at Bi-Crystal Interface Using Laser Array Based Nano-Second Raman Spectral Imaging

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