2729 An Explosive Welding Process by Effective Application of Reflected Underwater Shock Wave : Investigation on effects of Parameters Using Numerical Simulation

2007 ◽  
Vol 2007.1 (0) ◽  
pp. 619-620
Author(s):  
Kazumasa SHIRAMOTO ◽  
Hirofumi IYAMA ◽  
Yasuhiro UJIMOTO ◽  
Shoichiro KAI ◽  
Masahiro FUJITA ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Shock Wave ◽  
Explosive Welding ◽  
Welding Process ◽  
Underwater Shock Wave ◽  
Effective Application ◽  
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.

1433 An Explosive Welding Process by Effective Application of Reflected Underwater Shock Wave : A Method by Using Reflection at Bottom Surface

2008 ◽  
Vol 2008.1 (0) ◽  
pp. 273-274
Author(s):  
Kazumasa SHIRAMOTO ◽  
Takahiro TAKEDA ◽  
Hirofumi IYAMA ◽  
Yasuhiro UJIMOTO ◽  
Shoichiro KAI ◽  
...  
Keyword(s):  
Shock Wave ◽  
Explosive Welding ◽  
Welding Process ◽  
Bottom Surface ◽  
Underwater Shock Wave ◽  
Effective Application ◽  
Underwater Shock

2817 An Explosive Welding Process by Effective Application of Reflected Underwater Shock Wave

2006 ◽  
Vol 2006.1 (0) ◽  
pp. 283-284
Author(s):  
Kazumasa SHIRAMOTO ◽  
Hirofumi IYAMA ◽  
Yasuhiro UJIMOTO ◽  
Shoichiro KAI ◽  
Masahiro Fujita ◽  
...  
Keyword(s):  
Shock Wave ◽  
Explosive Welding ◽  
Welding Process ◽  
Underwater Shock Wave ◽  
Effective Application ◽  
Underwater Shock

Underwater Explosive Welding Using Detonating Code

2012 ◽  
Vol 706-709 ◽  
pp. 763-767 ◽  
Author(s):  
Akihisa Mori ◽  
Ayumu Fukushima ◽  
Kazumasa Shiramoto ◽  
Masahiro Fujita
Keyword(s):  
Numerical Simulation ◽  
Shock Wave ◽  
Sound Velocity ◽  
Detonation Velocity ◽  
Explosive Welding ◽  
Experimental Setup ◽  
Underwater Shock Wave ◽  
Welding Method ◽  
Metal Plates ◽  
Underwater Shock

Detonating code, which is a flexible code with an explosive core, is normally used to transmit the ignition of explosives with high detonation velocity 6 km/s. Therefore it is difficult to use detonating code for the explosive welding of common metals toward the detonating direction since the welding velocity exceeds the sound velocity of metals. Hence, an explosive welding method using underwater shock wave generated by the detonation of detonating code was tried. In the present investigation, the details of the experimental setup and results are reported. And the welding conditions are discussed through numerical simulation. From these results it is observed that the above technique is suitable to weld thin metal plates with relatively less explosives.

Numerical Simulation of Underwater Explosive Welding Process

2013 ◽  
Vol 767 ◽  
pp. 120-125 ◽  
Author(s):  
Wei Sun ◽  
Xiao Jie Li ◽  
Kazuyuki Hokamoto
Keyword(s):  
Numerical Simulation ◽  
Explosive Welding ◽  
Welding Process ◽  
High Hardness ◽  
Acceleration Process ◽  
Flyer Plate ◽  
Underwater Shock Wave ◽  
Experimental Parameters ◽  
Wave Morphology ◽  
Underwater Shock

Recently, underwater explosive welding shows its advantage in some difficult-to-weld combinations such as material with thin thickness, high hardness, and fragile quality. The pattern of the typical wave morphology in the interface of the welding specimen indicates the suitability of the selected experimental parameters and sound strength of the laminates. For the existence of the water, traditional Gurney formula and Aziz formula can not directly be used to evaluate the velocity and acceleration process of the flyer plate. Numerical simulation is necessary and irreplaceable for existing knowledge. Underwater explosive welding process was numerically simulated by ANSYS/LS-DYNA to explore the underwater shock wave and deformation process of the flyer plate. Velocity and pressure distribution of welding plates were obtained. The velocity of the flyer plate could satisfy the minimum velocity in explosive welding. It was found that water prevented the gross distortion and ensured the integrity of the composite laminate. Welding rate was increased by expanding the size of the explosive.

A New Method of Explosive Welding Performed by Effective Application of Reflected Underwater Shock Wave

2006 ◽  
Author(s):  
Kazumasa Shiramoto ◽  
Masahiro Fujita ◽  
Hirofumi Iyama ◽  
Yasuhiro Ujimoto ◽  
Shigeru Itoh
Keyword(s):  
Shock Wave ◽  
Explosive Welding ◽  
Underwater Explosion ◽  
Shock Pressure ◽  
Experimental Results ◽  
New Method ◽  
Underwater Shock Wave ◽  
Effective Application ◽  
Welding Method ◽  
Underwater Shock

In this report, we propose a new explosive welding method, and the welding is performed at employing underwater shock pressure produced by the underwater explosion of an explosive placed at one side almost vertical to the specimen to be welded. In order to prevent the reduction of the shock pressure with the distance away from explosive, a steel reflector is placed over the area of the specimen. The effects of the reflector are investigated based on the experimental results and the process is numerically analyzed results.

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