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Fatigue response up to 10 9 cycles of a structural epoxy adhesive
Author(s) -
Tridello Andrea,
Ciardiello Raffaele,
Paolino Davide Salvatore,
Goglio Luca
Publication year - 2020
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/ffe.13240
Subject(s) - adhesive , materials science , epoxy , composite material , fracture (geology) , epoxy adhesive , butt joint , tension (geology) , compression (physics) , fatigue testing , optical microscope , joint (building) , morphology (biology) , structural engineering , scanning electron microscope , metallurgy , engineering , layer (electronics) , biology , genetics
In the present paper, the very‐high‐cycle fatigue (VHCF) response of a structural adhesive used for automotive applications, Betaforce 4600G modified with microspheres, has been experimentally assessed. Ultrasonic fully reversed tension–compression tests up to 10 9 cycles have been carried out with the testing machine developed by the authors on adhesives without macroscopic defects and on adhesives with artificial defects, inserted during the butt‐joint preparation. Fracture surfaces have been observed with the optical microscope and the P‐S‐N curves estimated. Experimental results have shown that defect location significantly affects the VHCF strength and fracture surfaces exhibit a peculiar morphology with three distinct characteristic regions.