Definition
A high-strength synthetic aramid fiber used in aircraft composite structures, known for its excellent toughness, impact resistance, and tensile strength. In aviation, Kevlar is commonly woven into cloth and bonded with resin to form lightweight, damage-tolerant composite parts. It is typically yellow in color and is used where resistance to penetration, vibration, and impact is more important than rigidity.
Plain English
A very tough, lightweight man-made fiber used to build strong, impact-resistant aircraft parts. It is woven into a fabric, soaked with resin, and cured to form composite panels and components.
Context Anchor
Seen in aircraft composite material, repair, and inspection discussions, especially where fabric reinforcement, impact resistance, or lightweight panels are involved.
Derivation
Kevlar is a registered trade name created by DuPont in the 1960s when chemist Stephanie Kwolek developed the para-aramid fiber. The name itself was coined by the company and has no everyday meaning, but it has since become the common term in industry for this class of aramid fiber. Knowing it is a brand name (like Velcro or Plexiglas) helps explain why technical documents may use Kevlar and aramid fiber interchangeably.
Why Pilots Care
Kevlar reinforcement provides high strength with low weight in composite aircraft parts, improving performance and damage resistance.
Intuition Check
Kevlar is not metal armor, and it is not a general name for any strong plastic. In aircraft use, it refers to a specific high-strength fiber used as reinforcement in composite parts.
Example Sentence 1
The wingtip fairing is made of Kevlar, so use the approved aramid-cutting shears rather than standard scissors when trimming the repair patch.
Example Sentence 2
The rotor blades incorporated Kevlar layers to resist impact damage.