Advanced Textiles

Ballistic Fabric Energy Absorption Estimator

Energy scales with the square of velocity, so a 10% faster round carries 21% more energy.

Threat Projectile
g
m/s
Pack Armour construction
no.
g/m²

Projectile Kinetic Energy

— J

Energy the pack must absorb

Pack Performance

Specific Energy Absorption
— J·m²/kg
Energy per Layer
— J
Pack Areal Density
— kg/m²
Projectile Momentum
— kg·m/s

This is an energy budget, not a V50 prediction. Actual defeat depends on yarn tenacity, weave, backing and obliquity, and must be established by live fire to the relevant standard.

Ballistic Fabric Energy Absorption Estimator — free, with the formula and a worked example, at Textile School.