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.
Grind the loaded ends of the sandwich panel flat and perpendicular to the facings within 0.02mm to eliminate edge stress…
Always use a direct-contact deflectometer setup to measure core deflection; crosshead travel includes platen-seating errors.
Always roll the tape onto the steel plate with a standardized mechanical roller at a uniform speed to eliminate manual…
Cut the foam blocks with a precision bandsaw or hot-wire setup to ensure the loading faces are perfectly flat and…
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…
Always bond back-to-back strain gauges on every specimen to actively compute and document real-time out-of-plane bending percentages.
Always execute the three required structural pre-flex cycles to 75% deflection before recording official IFD force data.
Meticulously document the exact failure mode split: R (Rubber Failure), RC (Rubber-Cement), CP (Cement-Primer), or M (Metal Interface).
Coat the internal walls of the confinement fixture with a micro-thin layer of silicone grease or mineral oil to completely…
Apply a thin, uniform layer of silicone oil or petroleum jelly to platens to minimize interfacial friction coefficients.
Always verify that the upper spherically seated platen is unlocked and free to float during alignment, then locked or allowed…
Always discard the first 25mm of peeling data from calculations; adhesive failure must reach steady-state equilibrium before capturing valid averages.