Abstract
We have developed a novel optical deformation analyzer capable of investigating the mechanical state of a plastically deforming solid-state object nondestructively. By utilizing the newly developed plastic-deformation-wave (PDW) theory,1 rather than relying on visual inspection, this system is able to predict the location of a future fracture in a solid-state object under a constant external load before a microscopic crack appears.
© 1995 Optical Society of America
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