ASTM B571 Test Guide: Peel Testing for Metals
PeelGrind the chisel edge to the exact specified angle and sharpen regularly to maintain uniform shear force application.
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Grind the chisel edge to the exact specified angle and sharpen regularly to maintain uniform shear force application.
Ensure the support and loading rollers are free to rotate and articulate to completely eliminate parasitic twist stresses.
Always place the specified elastomer pads between the anvils and the panel to spread out high localized line loads.
Always roll the tape onto the steel plate with a standardized mechanical roller at a uniform speed to eliminate manual…
Always track and document sheet extrusion direction; test samples in both longitudinal and transverse axes to chart directional variation.
Inspect specimens under a microscope post-test; you must verify that the failure was true interlaminar shear and not top-edge crushing.
Clean the stainless steel probe tip with reagent-grade toluene or isopropyl alcohol and a lint-free wipe before every single stroke.
Meticulously clean the stainless steel test plate with diacetone alcohol or n-heptane and a lint-free wipe before every single strip…
Ensure both ends of compression rods are machined perfectly flat and parallel to within 0.025mm to avoid localized end-brooming.
Meticulously document the exact failure mode split: R (Rubber Failure), RC (Rubber-Cement), CP (Cement-Primer), or M (Metal Interface).
Set the support span precisely to standard depth configurations and verify loading noses are perfectly aligned at the third or…
Meticulously measure the inner radius and thickness at the curved apex to ensure mathematical precision in out-of-plane stress conversions.
Note that ASTM D7264 dictates a 32:1 span-to-thickness ratio, which is twice the 16:1 ratio specified by the plastics standard…
Ensure the support span is measured with a digital caliper and locked to exactly 16 times the measured thickness of…
Always discard the first 25mm of peeling data from calculations; adhesive failure must reach steady-state equilibrium before capturing valid averages.