Explosive welding of multilayer packages: Duration of initial acceleration

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Explosive welding of multilayer packages
Duration of initial acceleration
Professor Sergey Kuzmin, Russia, Volgograd State
Technical University
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Scheme of Simultaneous Explosion Welding
Initial Disposition of Plates in Sheet Pile
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Scheme of Simultaneous Explosion Welding
Initial Disposition of Plates in Sheet Pile
Process of Layer Colliding of Plates
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Scheme of Simultaneous Explosion Welding
Process of Layer Colliding of Plates
Initial Disposition of Plates in Sheet Pile
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Models of Process of Colliding Metal Plates in
Explosion Welding of Multilayer Sheet Piles
Belyaevs model
Model of VSTU

• Acceleration Stages
• Starting Stage (Period of Impulse Transfer from
  Colliding Body to Collided Packet)
• Final Stage (Acceleration Provided by Pressure of
  Detonation Products)

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Models of Process of Colliding Metal Plates in
Explosion Welding of Multilayer Sheet Piles
Mathematical (Computed) Model
- Mass of Sheet Pile
Model of VSTU
- Reduced Time of Acceleration Phase
p01 - Maximum Contact Point Pressure
- Tuning Indexes
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Experiment Procedure
Experiment Diagram
nichrome wire
current generator
digital oscilloscope
Typical Time History
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Experiment Procedure
Experiment Diagram
nichrome wire
current generator
digital oscilloscope
Typical Time History
1 Acceleration Curve of Flayer Plate 2 Initial Section of Acceleration of Sheet Pile with Double Welded Plates (Experiment) 3 Velocity of Sheet Pile, Computed by Momentum Conservation Law
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Experimental results
Dependence of Duration of Initial Acceleration
Stage ?in from Thickness of Plates Being Welded
?? and Acceleration Phase h1/H
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Experimental results
Dependence of Duration of Initial Acceleration
Stage ?in from Thickness of Plates Being Welded
?? and Acceleration Phase h1/H
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Experimental results
Dependence of Duration of Initial Acceleration
Stage ?in from Thickness of Plates Being Welded
?? and Acceleration Phase h1/H
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Experimental results
Dependence of Duration of Initial Acceleration
Stage ?in from Thickness of Plates Being Welded
?? and Acceleration Phase h1/H
tin, ms
12
8
4
dS, mm
10
8
h1/H
1
6
0,7
0,4
4
0,1
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Experimental results
Dependence of Mathematical Model Tuning Indexes
from Acceleration Phase h1/H and Plates Thickness
dS
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