Methods

Tensile Testing

• • "The material ends are gripped in self-clamping jaws, such as split cylinders, around which the textile form is wrapped in a way that minimizes end-effects."
  • Note that ultimate strength can not be determined by a break at the jaws.
  • Gather data from FED-STD-191A Spec 4108

Tear Testing

Materials

Cloth

• • See Federal Standard 191, Test Method 5134
  • "Ravel-strip" method for tensile testing in one direction

Tapes and Webbings

• • See Federal Standard 191, Test Method 5100

Thread

• • See Federal Standard 191, Test Method 4100.1

Cords

• • See Federal Standard 191, Test Method 4102

Resources

[1] Ewing, Bixby, and Knacke, Recovery Systems Design Guide