Foam Core Density & Porosity Calculator

What is Foam Core Density & Porosity?

Foam core is a lightweight closed-cell core material for composite sandwich structures. Density determines weight and mechanical strength, while porosity represents the volume ratio of air cavities. Both parameters are critical for aerospace, marine, wind turbine and automotive composite design.

Calculation Formulas (Industry Standard)

Where:
• ρ_base = Solid foam base material density (g/cm³)
• ρ_apparent = Foam core apparent density (g/cm³)
• P = Foam core porosity percentage (%)

Enter Values

Foam Base Material Density ρ_base (g/cm³) Foam Core Apparent Density ρ_apparent (g/cm³) Calculate Porosity & Density

Typical Real-World Example

PVC closed-cell foam core: Base density = 1.4 g/cm³, Apparent density = 0.08 g/cm³ → Porosity ≈ 94.29%. This is a standard lightweight specification for aerospace composite sandwich panels.

Engineering Applications

• Composite sandwich structure core material selection
• Aerospace, marine and wind turbine foam core design
• Quality inspection and material performance verification
• Weight optimization and structural stiffness calculation
• Closed-cell foam production and specification testing