Glass Bottle Fracture Behavior by Underwater Shock-Wave - Effect of Micro-Bubble on the Fracture Behavior -

2018 ◽  
Vol 774 ◽  
pp. 303-306
Author(s):  
Yoshifumi Ohbuchi ◽  
Sota Sugahara ◽  
Shigeru Tanaka ◽  
Shinichi Enoki ◽  
Genj Hotta ◽  
...  
Keyword(s):  
Shock Wave ◽  
Fracture Behavior ◽  
Experimental Result ◽  
Glass Bottle ◽  
Underwater Shock Wave ◽  
Small Glass ◽  
Micro Bubble ◽  
Underwater Shock ◽  
The One ◽  
The Impact

In order to promote the recycling of the one way glass bottles, the impact fracture by using the pulse power underwater shock-wave with micro bubble was examined. It is reported that the pressure of underwater shock-wave with micro-bubble increases. From the experimental result, the glass bottle‘s crushed experiment was executed in the water with micro-bubble. As a result, the small glass fragments (Cullet) increased and it was shown that the micro-bubble in the water promoted the bottle fracture.

New Technique for “Cullet” Generation of Glass Bottles by Using Underwater Shockwave

2006 ◽  
Vol 326-328 ◽  
pp. 1551-1554
Author(s):  
Hidetoshi Sakamoto ◽  
Shinjiro Kawabe ◽  
Kazuo Satoh ◽  
Masahiro Himeno ◽  
Shigeru Itoh
Keyword(s):  
Shock Wave ◽  
High Speed ◽  
Fracture Process ◽  
Image Converter ◽  
Glass Bottle ◽  
Underwater Shock Wave ◽  
Application Technique ◽  
System A ◽  
Underwater Shock ◽  
Glass Bottles

As the application technique for glass bottle’s recycling system, a new “Cullet” generation method by using underwater shock wave was proposed. This small fragmentation technique of glass bottles has a lot of excellent advantages such as the simplification of process by simultaneous cleaning and crushing operation, the high collect rate of “Cullet” and so on. In this study, the relation between of the explosive conditions and “Cullet” sizes were clarified and the high speed fracture process of glass bottle was observed by framing photograph of high speed image converter.

scholarly journals Evaluation of anti-explosion performance of Shuibuya concrete-faced rockfill dam slabs subjected to strong shock waves caused by an underwater explosion

2019 ◽  
Vol 11 (3) ◽  
pp. 168781401882220 ◽  
Author(s):  
Lu Lu ◽  
Ye Zhu ◽  
De-Gao Zou ◽  
Qin-Man Fan ◽  
Shao-Bing Dong
Keyword(s):  
Shock Wave ◽  
Damage Model ◽  
Dimensional System ◽  
Explicit Integration ◽  
Underwater Shock Wave ◽  
Plastic Damage ◽  
Rockfill Dam ◽  
Underwater Shock ◽  
The Impact ◽  
Tensile Damage

A concrete plastic-damage model, the extended Drucker–Prager model for rockfill, and acoustic elements for water were introduced and applied to the impact fracture analysis of a concrete-faced rockfill dam–water three-dimensional system. The plastic-damage dynamic analysis process was used in combination with the concrete compressive and tensile damage model. The 223-m high Shuibuya concrete-faced rockfill dam was analyzed using an explicit integration. Numerical simulations of the damage threshold, rockfill modeling, and interface processing were conducted to research the effect of the anti-explosion performance that occurs when a concrete slab is subjected to an underwater shock wave. The simulation results indicate that the main regions of weakness in the slabs during an underwater shock wave are determined by the tensile damage. The slab’s anti-knock weak areas appear in the right dam abutment and the top of the left dam. The anti-knock performance in the upper slab is inferior to that of the lower slab. Specific local optimization steps should be applied at these locations to improve the slabs’ anti-knock capabilities, which are important for designing concrete-faced rockfill dams.

Experimental Study of the Impact of a Strong Underwater Shock Wave on a Concrete Dam

2012 ◽  
Vol 152-154 ◽  
pp. 1063-1070 ◽  
Author(s):  
Lu Lu ◽  
Li Xin ◽  
Zhou Jing
Keyword(s):  
Shock Wave ◽  
Upstream Face ◽  
Downstream Face ◽  
Underwater Shock Wave ◽  
Concrete Dam ◽  
Acceleration Sensors ◽  
Input Pressure ◽  
Underwater Shock ◽  
The Impact

To study the effect of a strong underwater shock wave on a concrete dam, in this research the hammers impact were applied to simulate the underwater shock in a model test. The model scale was 200 according to the gravity-elasticity similitude law. Five acceleration sensors were imbedded along the downstream surface of the dam. The maximum input pressure was evaluated based on the recorded accelerations. The explosive charge and the distance between the explosion center and the dam were determined corresponding to the maximum impact pressure. After the hammers impacted, the upstream face of the dam was fractured and downstream was scabbed; some cracks extended from the upstream face to the downstream face; the head of dam was projected; and the dam appeared entirely displacement. Although the damage similarity of the model and prototype is not verified, this method may be used to verify the quality of a protection project and offered evidence to define a protection project.

An Investigation on Underwater Explosive Bonding Process

2001 ◽  
Vol 123 (4) ◽  
pp. 486-492 ◽  
Author(s):  
Hirofumi Iyama ◽  
Akio Kira ◽  
Masahiro Fujita ◽  
Shiro Kubota ◽  
Kazuyuki Hokamoto ◽  
...  
Keyword(s):  
Shock Wave ◽  
Numerical Analysis ◽  
High Speed ◽  
Base Plate ◽  
Amorphous Film ◽  
Experimental Result ◽  
Flyer Plate ◽  
Underwater Shock Wave ◽  
Good Reliability ◽  
Underwater Shock

In this paper, we propose a new explosive bonding method for bonding materials by using the underwater shock wave from the explosion of explosives in water. This method is especially suitable to bond the materials with thin thickness and largely dissimilar property. In bonding those materials, the shock pressure and the moving velocity of shock wave on the flyer plate should be precisely managed to achieve an optimum bonding conditions. In this method, the bonding conditions can be controlled by varying of the space distance between the explosive and the flyer plate or by inclining the explosive charge with the flyer plate. We made the experiment of this technique bond the amorphous film with the steel plate. A satisfactory result was gained. At the same time, numerical analysis was performed to investigate the bonding conditions. The calculated deformation of the flyer plate by the action of underwater shock wave was compared with the experimental recordings by high-speed camera under the same conditions. The comparison shows that the numerical analysis is of good reliability on the prediction of the experimental result. Furthermore, the numerical simulation also gives the deformations of the flyer and the base plate, and the pressure and its variation during the collision process.

High-Speed Fracture Phenomena of Glass Bottle by Underwater Shock Wave

2010 ◽  
Vol 654-656 ◽  
pp. 2543-2547 ◽  
Author(s):  
Hidetoshi Sakamoto ◽  
Shinjiro Kawabe ◽  
Yoshifumi Ohbuchi ◽  
Shigeru Itoh
Keyword(s):  
Shock Wave ◽  
Efficient Method ◽  
Fracture Mechanism ◽  
High Speed ◽  
Glass Bottle ◽  
Underwater Shock Wave ◽  
Glass Containers ◽  
Wave Technique ◽  
Underwater Shock ◽  
Glass Bottles

The high-speed fracture phenomena of glass bottles by using underwater shock wave technique for recycling the glass containers were discussed. The proposed technique is an efficient method for the crushing of glass bottles. In this study, the influence of various explosive conditions, that is, the explosive shape, set position, amount, the bottle size and the contents of bottle, on the cullet size, which is the crushed glass fragments, was studied. Furthermore, the behaviors of underwater shock wave were observed by high-framing photograph and the high-speed fracture mechanism was clarified.

Explosive Welding Using Underwater Shock Wave Generated by the Detonation of the Detonating Code

2011 ◽  
Vol 673 ◽  
pp. 265-270 ◽  
Author(s):  
Akihisa Mori ◽  
Li Qun Ruan ◽  
Kazumasa Shiramoto ◽  
Masahiro Fujita
Keyword(s):  
Shock Wave ◽  
Sound Velocity ◽  
Detonation Velocity ◽  
Explosive Welding ◽  
New Method ◽  
Underwater Shock Wave ◽  
Metal Plates ◽  
Experimental Parameters ◽  
Underwater Shock ◽  
Point Velocity

Detonating code is a flexible code with an explosive core. It is used to transmit the ignition of explosives with high detonation velocity in the range of 5.5 to 7 km/s. However, it is difficult to use detonating code for the explosive welding of common metals since the horizontal point velocity usually exceeds the sound velocity. Hence, in the present work, a new method using underwater shock wave generated by the detonation of detonating code was tried. The details of the experimental parameters and the results are presented. From the results it is observed that the above technique is suitable to weld thin metal plates with relatively less explosives.

Von Neumann reflection of underwater shock wave

1999 ◽  
Vol 85 (1-3) ◽  
pp. 48-51 ◽  
Author(s):  
Y Nadamitsu ◽  
Z.Y Liu ◽  
M Fujita ◽  
S Itoh
Keyword(s):  
Shock Wave ◽  
Underwater Shock Wave ◽  
Von Neumann ◽  
Underwater Shock

Numerical Simulation on Explosive Welding Process Using Reflected Underwater Shock Wave

2007 ◽  
Vol 566 ◽  
pp. 309-314
Author(s):  
Kazumasa Shiramoto ◽  
Masahiro Fujita ◽  
Yasuhiro Ujimoto ◽  
Hirofumi Iyama ◽  
Shigeru Itoh
Keyword(s):  
Numerical Simulation ◽  
Shock Wave ◽  
Explosive Welding ◽  
Welding Process ◽  
Underwater Shock Wave ◽  
Underwater Shock ◽  
Effective Use

The paper describes a numerically simulated result for the explosive welding using reflected underwater shock wave. Through the numerical simulation, the effective use of reflected underwater shock wave was clearly suggested and the method to improve the assembly was demonstrated.

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