Both adherends bend as they are pulled apart, as in ASTM D1876, so the test measures the bond's resistance to peeling with no rigid backing. It suits thin metal, film and fabric laminates and is a common screening test for structural adhesive toughness and surface prep. Results are averaged over the steady part of the peel curve, ignoring the initial spike.
T-peel on the toughened epoxy is triple the standard one, that's what we need for the crash parts.
Also heard as
- T-peel test
Related terms
Peel
The force needed to strip a flexible bonded layer off a surface, given per unit width.
Toughened
Describing an adhesive modified with rubber or soft particles so the bond resists cracking, peel and impact.
Coupon
A small standard test piece, usually a metal or plastic strip, bonded to check adhesive strength or prep.
Cohesive failure
A break that runs through the adhesive itself, leaving adhesive on both parts.