| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 774838 | Engineering Fracture Mechanics | 2013 | 12 Pages |
•We conduct a systematic experimental study on bi-material (polymer/aluminum) specimens with notches and interfaces.•Variations in notch angles, bonding strengths and loading locations.•Notch angles and bonding strengths have significant effects on crack initiation load.•Loading point locations affect the local mode-mixity at notch tips and crack initiation load.•Real-time videos show the in situ stress and crack developments during experiments.
A systematic experimental study was conducted to investigate the interaction between cracks, notches and interfaces of bonded aluminum and polymer joints. Bi-material specimens with sharp V-notches with variation in notch angles (30°, 90° and 120°), bonding strengths and loading locations were tested under three-point bonding. The notch angle and the bonding strength have significant effect on the crack initiation load. For weakly bonded polymer/metal specimens, crack initiation load increases with the increase of the notch angle. The loading point locations also affect the crack initiation load due to change in local mode-mixity at the notch tip.
