Hackle marks
Ridges on the fracture surface oriented perpendicular to the crack propagation direction; they appear in the mist and hackle zones at higher crack velocities and provide a local direction-of-propagation vector.
Ridges on the fracture surface oriented perpendicular to the crack propagation direction; they appear in the mist and hackle zones at higher crack velocities and provide a local direction-of-propagation vector.
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