ASTM C364 Test Guide: Compression Testing for Composites
CompressionGrind the loaded ends of the sandwich panel flat and perpendicular to the facings within 0.02mm to eliminate edge stress…
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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.
Cut the foam blocks with a precision bandsaw or hot-wire setup to ensure the loading faces are perfectly flat and…
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.
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…