Dynamic crack propagation across a perpendicular interface in a glass specimen was investigated to understand the interaction between the crack and the interface under impact loading. The glass specimen was composed of two glass plates in an edge-to-edge configuration with an adhesive layer in between. One of the plates had a notch for a plastic projectile to strike. A single crack developed from the notch tip, and propagated perpendicularly into the interface. The patterns of crack propagation across the interface depend on the adhesive conditions on the interface. Within a range of impact speeds, the crack is arrested at the interface without any adhesive. The crack passes across a firmly bonded interface with little obstruction by the interface. The crack branches into multiple cracks after it passes through a thicker interface filled with adhesive. Projectiles having higher kinetic energies cause more severe crack branching after the crack extends into the second glass plate.
Experimental Investigation on Dynamic Crack Propagating Perpendicularly Through Interface in Glass
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Park, H., and Chen, W. W. (August 5, 2011). "Experimental Investigation on Dynamic Crack Propagating Perpendicularly Through Interface in Glass." ASME. J. Appl. Mech. September 2011; 78(5): 051013. https://doi.org/10.1115/1.4004283
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