Experimental study on explosion dispersion process of a multi-layer composite charge under different initiation modes

The Fast Mobility Particle Sizer (FMPS) has been used to measure the particles number concentration and size distribution (6-560nm) of vehicle exhaust plume. The results reveal that vehicle exhaust contribute dominantly to the number concentration in the atmosphere particle. The particles total concentration decreases in the dispersion process. Furthermore, the transformation processes such as nucleation ,coagulation and condensation happen with dispersion process. Because of large number of nucleation mode particles, the coagulation process is in the advantage, which make the particles diameter increase.

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Blast wave characteristics of multi-layer composite charge: Theoretical analysis, numerical simulation, and experimental validation

Defence Technology ◽

10.1016/j.dt.2021.11.012 ◽

2021 ◽

Author(s):

Jun-bao Li ◽

Wei-bing Li ◽

Xiao-wen Hong ◽

Jia-xin Yu

Keyword(s):

Numerical Simulation ◽

Theoretical Analysis ◽

Blast Wave ◽

Experimental Validation ◽

Wave Characteristics ◽

Layer Composite ◽

Composite Charge

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Experimental study of layer composite delamination under mode I and mode II

Mechanik ◽

10.17814/mechanik.2016.7.189 ◽

2016 ◽

pp. 818-819

Author(s):

Jacek Stadnicki ◽

Jerzy Marszałek

Keyword(s):

Experimental Study ◽

Mode I ◽

Mode Ii ◽

Layer Composite

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Experimental study on the restoration from a tilt-azimuth series for improvement in resolution

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010013955x ◽

1995 ◽

Vol 53 ◽

pp. 636-637

Author(s):

Norio Baba ◽

Norihiko Ichise ◽

Syunya Watanabe

Keyword(s):

Experimental Study ◽

Spherical Aberration ◽

Incident Beam ◽

Optical Parameters ◽

Beam Tilting ◽

Illumination Method ◽

Restoration Method ◽

Illumination Mode

The tilted beam illumination method is used to improve the resolution comparing with the axial illumination mode. Using this advantage, a restoration method of several tilted beam images covering the full azimuthal range was proposed by Saxton, and experimentally examined. To make this technique more reliable it seems that some practical problems still remain. In this report the restoration was attempted and the problems were considered. In our study, four problems were pointed out for the experiment of the restoration. (1) Accurate beam tilt adjustment to fit the incident beam to the coma-free axis for the symmetrical beam tilting over the full azimuthal range. (2) Accurate measurements of the optical parameters which are necessary to design the restoration filter. Even if the spherical aberration coefficient Cs is known with accuracy and the axial astigmatism is sufficiently compensated, at least the defocus value must be measured. (3) Accurate alignment of the tilt-azimuth series images.

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