Premium
Strain rate dependency on failure load and stress intensity factor of single lap steel joints bonded with epoxy adhesive reinforced with nano‐Al 2 O 3 sphere and rod particles
Author(s) -
Gupta Sunil Kumar
Publication year - 2021
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.25866
Subject(s) - materials science , epoxy , composite material , adhesive , nano , stress (linguistics) , shear strength (soil) , stress intensity factor , failure mode and effects analysis , shear stress , layer (electronics) , fracture mechanics , linguistics , philosophy , environmental science , soil science , soil water
The failure load of single‐lap steel joints (subjected to compressive force) with epoxy/nano‐Al 2 O 3 adhesives containing 0.5, 1.0, 1.5, and 2.0 wt% of sphere and rod nano‐Al 2 O 3 was analyzed at quasi‐static loading. At optimum wt% (1.5 wt%) of nano‐Al 2 O 3 , the failure load of epoxy/nano‐Al 2 O 3 adhesive was determined at high strain rates using Kolsky bar. Critical stress intensity factor of the adhesive layer at the corner of single‐lap joints was calculated from the experimentally obtained failure load. A substantial improvement in the failure load and critical stress intensity factor of epoxy/nano‐Al 2 O 3 adhesives was achieved compared to the base adhesive at quasi‐static and high shear strain rates. Whereas, the failure load of epoxy/nano‐Al 2 O 3 adhesives containing 1.5 wt% of sphere and rod nano‐Al 2 O 3 at high shear strain rates were 3 to 5 times more than the static failure load of adhesives. The reinforcement of sphere nano‐Al 2 O 3 in epoxy had better performance on failure load and critical stress intensity factor of joints compared to rod nano‐Al 2 O 3 under the compressive mode of loading.