Experimental investigation of flyer character driven by a laser and increasing pressure with the flyer technique

Fu, Sizu; Gu, Yuqiu; Huang, Xiang; Wu, Ji; He, Jun; Ma, Mingxun; Luo, Pingqing; Zhang, Yonghui

doi:10.1063/1.1496083

Cited by 13 publications

(8 citation statements)

References 15 publications

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“…(T= (9) where A,B,C, n, and m are considered to be material constants, e. is the equivalent plastic strain, and, e and E' O are strain rate and the reference strain rate under quasi-static loading. The thermal softening term T* can be expressed as: …”

Section: Constitutive Modelmentioning

confidence: 99%

“…The step pressure value depends on the impact velocity and on the nature of the fiyer and target materials, while the step duration is proportional to the fiyer thickness [8]. Moreover, the laser-driven flyer technique can increase pressure [9]. The flyer can also protect the workpiece from thermal effects so that pure mechanical effects are induced.…”

Section: Introductionmentioning

confidence: 99%

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A Study on Fabricating Microdeep Recessed Part on Copper Foil Using Laser Indirect Shock Forming

Liu¹,

Shen²,

Wang³

et al. 2013

Journal of Manufacturing Science and Engineering

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Laser indirect shock forming is a novel microfabrication technique to introduce 3D profiles in metallic thin films. Experiments were performed by allowing the laser-driven flyer to impact the thin film, which is placed above a micromould. The effects of laser energy and sample thickness on deformation mechanism were investigated experimentally. The experimental results show that increasing the laser energy could increase the deformation depth, but may induce fracture along the edges of the micromould when the laser energy is too high. Moreover, the target plate was completely sheared off for 10 ßm copper when the pulse energy is 1200 ml. So it can be found that the technique can also realize micro punching of metallic thin films. The transient deformation of copper foil impacted by laser-driven flyer is simulated in this paper. Experimental data obtained were then used to validate the corresponding simulation model. Good agreement has been obtained between the numerical simulation and the experiments under different laser energy. The rising temperature due to the adiabatic conditions is taken into account. And the strain distribution has been also calculated numerically.

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Section: Constitutive Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Study on Fabricating Microdeep Recessed Part on Copper Foil Using Laser Indirect Shock Forming

Liu¹,

Shen²,

Wang³

et al. 2013

Journal of Manufacturing Science and Engineering

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“…A lens array 30,31 ͑LA͒ was used to eliminate the large scale spatial modulation and to obtain a flat-topped profile in the focal plane. The Shenguang-II laser facility provides one-dimensional compression by smoothed laser beams with short wavelength and high intensity.…”

Section: Experiments Setupmentioning

confidence: 99%

Laser-driven shock wave stability in Al through Au and determination of the TPa hugoniot point in Au

Shu

Huang

et al. 2008

Journal of Applied Physics

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High-quality shock waves were produced using the ninth laser beam ͑converted to 2͒ of Shenguang-II laser facility and the beam smoothing technology of a lens array. The spatial uniformity of the shock wave was estimated by measurements of the self-emission from the target rear surface. An Al-Au four-step target with 30 m Al base and four Au steps was fabricated and used to investigate the temporal steadiness of the shock wave in the Al-Au two-layer target. The Al-Au four-step target experiment indicated that the shock wave steadily propagated in the Au material with thickness range Ͻ11 m. A modified Al-Au impedance-match target was designed, which could simultaneously measure shock-wave stability and Au Hugoniot data in one shot. The experiment results indicated that the shock wave steadily propagated in the Al target with thickness of about 30-47 m under a power density of ϳ1.0ϫ 10 14 W / cm 2 .

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“…Table 1 shows the recent laser-driven flier results. The highest flier velocity has been achieved by Fu et al [8] who succeeded in launching a 10-µm Al flier to 30.3 km/s. They obtained the flier average velocity on the basis of observation of the shock luminescent signal from the rear surface of an inclined target impacted continuously by the flier.…”

Section: Introductionmentioning

confidence: 99%

Laser-driven flier impact experiments at the SG-III prototype laser facility

Shui¹,

Chu²,

Xin³

et al. 2015

Chinese Phys. B

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Laser-driven flier impact experiments have been designed and performed at the SG-III prototype laser facility. The continuum phase plate (CPP) technique is used for the 3 ns quadrate laser pulse to produce a relatively uniform irradiated spot of 2 mm. The peak laser intensity is 2.7×1013 W/cm2 and it accelerates the aluminum flier with a density gradient configuration to a high average speed of 21.3 km/s, as determined by the flight-of-time method with line VISAR. The flier decelerates on impact with a transparent silica window, providing a measure of the flatness of the flier after one hundred microns of flight. The subsequent shock wave acceleration, pursuing, and decay in the silica window are interpreted by hydrodynamic simulation. This method provides a promising method to create unique conditions for the study of a material’s properties.

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Experimental investigation of flyer character driven by a laser and increasing pressure with the flyer technique

Cited by 13 publications

References 15 publications

A Study on Fabricating Microdeep Recessed Part on Copper Foil Using Laser Indirect Shock Forming

A Study on Fabricating Microdeep Recessed Part on Copper Foil Using Laser Indirect Shock Forming

Laser-driven shock wave stability in Al through Au and determination of the TPa hugoniot point in Au

Laser-driven flier impact experiments at the SG-III prototype laser facility

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