Fatigue life tests of thick bondline adhesively-bonded joints under constant amplitude loading conditions

Abstract eng:
The study presents the test results of thick bondline adhesive-bonded joints in variable load conditions at loading cycle asymmetry coefficient R = 0. The study included the following samples: G1 group (without aging), G5 group (samples stored for 4 weeks in water at 20 ÂşC) and G7 group (samples stored for 1 week in water at 20 ÂşC, and sealed air-tight for 1 week in a water and moisture barrier film at 70ÂşC). Fatigue life results for G1 and G5 samples do not show significant differences for each load level indicating that the ageing conditions used for G5 samples did not affect the fatigue life. The comparison of the S-N curves for G1 and G7 samples shows significant differences indicating that the ageing conditions used for G7 samples resulted in an increase in fatigue life compared to G1 samples without ageing). Significant differences can be observed depending on the load level.

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