A modified expanding cavity model (M-ECM) is developed to describe subsurface deformation for strain-hardening materials loaded in unit deformation configurations occurring in surface mechanical attrition. The predictive results of this model are validated by comparison with unit deformation experiments in a model material, oxygen free high conductivity copper, using a custom designed plane strain deformation setup. Subsurface displacement and strain fields are characterized using in-situ digital image correlation. It is shown that conventional analytical models used to describe plastic response in strain-hardening metals are not able to predict important characteristics of the morphology of the plastic zone, including evolution of the dead metal zone (DMZ), especially at large plastic depths. The M-ECM developed in the present study provides an accurate prediction of the strain distribution obtained in experiment and is of utility as a component in multi-stage process models of the final surface state in surface mechanical attrition.
- Manufacturing Engineering Division
Subsurface Deformation in Surface Mechanical Attrition Processes
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Wang, Z, Basu, S, & Saldana, C. "Subsurface Deformation in Surface Mechanical Attrition Processes." Proceedings of the ASME 2015 International Manufacturing Science and Engineering Conference. Volume 2: Materials; Biomanufacturing; Properties, Applications and Systems; Sustainable Manufacturing. Charlotte, North Carolina, USA. June 8–12, 2015. V002T01A013. ASME. https://doi.org/10.1115/MSEC2015-9476
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