(3) Fatigue Crack Growth Properties of Adhesive Bonded Joints

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Key Points

The study aims to assess fatigue crack growth properties in adhesive bonded joints under various conditions.
Utilized mode I loading double cantilever beam specimens for experiments.
Conducted tests with specified load ratios of 0.1 and 0.5 and adhesive layer thicknesses of 0.3 and 3.0 mm.
Evaluated equivalent energy release rate for assessing fatigue crack growth behavior.
Lower limit energy release rates decrease as adhesive layer thickness becomes thinner.
Each adhesive showed that higher static fracture toughness values correlated with higher lower limit energy release rates.
Paris law slope demonstrated minimal influence from adhesive layer thickness, with smaller slopes correlating with larger lower limit energy release rate ratios.

This review reveals fatigue crack growth characteristics in adhesive bonded joints with varied adhesives, highlighting evaluation methods.

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Kimiyoshi Naito (2024) studied this question.

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