Composites

Woven Roving Thickness & Laminate Stack Planner

Ply thickness is not a property of the cloth — it is a property of the cloth and the volume fraction your process actually reaches.

Reinforcement Per ply
g/m²
g/cm³

E-glass 2.55, carbon 1.79, aramid 1.44.

%

Hand layup 30–40%, vacuum bag 45–55%, infusion 50–60%.

g/cm³
Laminate Target
mm

Cured Ply Thickness

— mm

At the achievable fibre volume fraction

Stack Plan

Plies Required
— no.
Thickness Delivered
— mm
Laminate Weight
— kg/m²
Resin Required
— kg/m²
Resin to Glass Ratio
— ×

Fibre volume fraction is the whole answer and it is a process property, not a material one — the same cloth hand-laid and infused differs by nearly half a ply in thickness. Resin demand here is what ends up in the laminate; add the consumables, feed lines and catch pot before ordering.

Woven Roving Thickness & Laminate Stack Planner — free, with the formula and a worked example, at Textile School.