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A damage zone method based on three-dimensional finite element analysis was proposed to predict the failure loads of single-lap bonded joints with dissimilar composite-aluminum materials. To simulate delamination failure, interply resin layers between any two adjacent orthotropic laminas of composite adherend were assumed with the thickness of one tenth of a composite lamina. Geometrical and material nonlinearity were considered in the analysis. Based on the experimental observation that the failure modes of the specimens were dominated by delamination and debonding, the Ye criterion was applied to account for the out-of-plane failure of composite adherend and the Von Mises strain criterion was applied for the adhesive layer. The failure indices were multiplied to the predicted damage zone as a weight factor and the calculated damage zones were divided by an area or volume considering the joint geometry. Predicted failure loads show deviation within 15% from experimental results for 6 different bonding lengths or adherend thicknesses.

목차

Abstract
1. INTRODUCTION
2. FAILURE LOAD PREDICTION
3. RESULTS AND DISCUSSION
4. CONCLUSIONS
ACKNOWLEDGEMENTS
REFERENCES

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