A Complex Systems Approach to Metallic Fracture Surface Characterization
NAVAL RESEARCH LAB WASHINGTON DC
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The physical scale of observation and the mathematical formation of description are important choices for the modeling of physical phenomena. The role of local interactions in relating complex features at different scales in inelastic material fracture is important since material damage has local origins while fracture is a large scale event. In this investigation, the relationship between large scale and small continuum scale fracture surface features are quantified in terms of local, small scale interactions. Experimental measurement of local fracture surface orientation were obtained from processing video images of the fracture surface under different illumination directions. The image processing mapped pixel intensities into a set of three local fracture surface inclination classes defined with respect to the macroscopic surface normal and crack growth direction.