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Improvement of impact fatigue strength of adhesive joint by CTBN modification
Author(s) -
Makota Imanaka,
Kishimoto Waichiro,
Okita Kozo,
Nakayama Hideaki
Publication year - 1984
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1984.070290135
Subject(s) - adhesive , materials science , composite material , epoxy , fatigue limit , butt joint , joint (building) , stress (linguistics) , stress concentration , epoxy adhesive , polyamide , structural engineering , fracture mechanics , layer (electronics) , metallurgy , linguistics , philosophy , engineering
Impact fatigue behaviors of the steel/CTBN‐modified adhesive/steel butt joint were investigated. The adhesive butt joint specimens used in the present work were bonded with epoxy–polyamide and CTBN‐modified epoxy–polyamide adhesives. Fatigue tests were also conducted under nonimpact stress conditions to compare with the results from the impact fatigue test. The experiments showed that for the joint specimen from the adhesive modified with the CTBN the fatigue strength becomes higher under both of the stress conditions. In particular, the fatigue strength was improved remarkably under impact stress condition, that is, the distinct stress cycles dependence of impact strength was decreased by modifying the adhesive with CTBN. Furthermore, the effect of adhesive thickness on the fatigue strength was also discussed for the adhesive joint modified with CTBN. Under impact stress conditions, the relation between the fatigue strength and the adhesive layer thickness is different from that under the nonimpact one.