High-Energy Rate Metal Cladding

Explosive Cladding & Explosion Welding (EXW) Stand-off & Impact Calculator

Engineering preflight calculator for explosive metal cladding (EXW). Computes optimal parallel stand-off spacing, flyer impact velocity ($V_p$), collision angle ($\beta$), interfacial wavy bond wavelength, and edge exclusion scrap trim margins.

1. Input Parameters

Flyer Plate Clad Metal

Flyer Plate Thickness t_f (mm)

Base Plate (Steel) Thickness t_b (mm)

Detonation Velocity V_D (m/s)

Subsonic relative to metal sound speed (typically 1800 - 2600 m/s)

Explosive Mass Ratio R = C/M

Mass of explosive / Mass of flyer plate

2. Calculation Results

Stand-off Gap Distance

-- mm

Flyer Impact Velocity

-- m/s

Collision Angle β

-- °

Bond Wave Amplitude

-- µm

Perimeter Edge Trim Margin

-- mm

Peak Jetting Pressure

-- GPa

3. Geometric Visualizer

Tooling & Vector Prepress Engineering Notes

Explosive Cladding Physics & Jetting: Explosion welding (EXW) creates a true solid-state metallurgical bond between incompatible metals (e.g. titanium onto carbon steel) that cannot be fusion welded due to brittle intermetallic formation. The high-explosive detonation propels the flyer plate across a calibrated stand-off gap ($h_s$) at supersonic impact velocity. At the collision point, extreme pressures ($5-15\text{ GPa}$) exceed material yield strength, creating a high-velocity re-entrant metal jet that strips surface oxides ahead of the collision front.

Stand-off Gap & Edge Trim Margins: The parallel stand-off gap ($h_s \approx 0.8 - 1.5 \times t_f$) allows the flyer plate to accelerate to its terminal velocity before impacting the base plate. Along plate edges, boundary detonation rarefaction creates non-bonded or weak zones (50–120 mm), requiring generous edge trim margin exclusion lines in the final pre-cut CAM nesting vector DXFs.

Interfacial Wavy Bond Morphology: Controlled hydrodynamic flow produces a continuous interlocking wavy interface. Wavelength ($\lambda$) and amplitude ($A$) indicate bond quality and shear strength exceeding ASTM A263 / A264 / B898 standards.