Published: Jan 1992
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The effects of temperature/humidity exposure on the cyclic-creep behavior of metal-to-metal adhesively bonded single-overlap joints have been investigated. Three adhesives, a toughened epoxy, a vinyl/epoxy, and an epoxy/acrylic, were studied in the ambient condition and after being exposed to a temperature/humidity environment. Results show environmental exposure can increase the minimum creep rate of overlap bonded joints as much as 80%. In addition, small variances in maximum stress can significantly increase the minimum creep rate. A technique is described for extrapolating long-term cyclic creep from short duration test results.
structural adhesive, fatigue, cyclic creep, environmental effects, overlap joint, static creep, creep rate, advanced materials
Research staff, Ford Motor Company, Dearborn, MI