Abstract
Abstract We present results for full-field measurements of crack tip deformation fields in Nitinol using high sensitivity moiré interferometry. Three fatigue loading scenarios are examined illustrating the effect of stress induced martensite transformations at the tip of the crack. Understanding the behavior of fatigue crack growth is paramount to the successful use of this highly complex material response, especially for such application as implantable medical devices. The results demonstrate the sensitivity of heterogeneous phase transformations on the crack growth behavior.
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