Publications

Conversion of Plastic Work to Heat: A full-field study of thermomechanical coupling

Jones, Amanda; Reedlunn, Benjamin R.; Jones, Elizabeth M.; Kramer, Sharlotte L.

This project targeted a full-field understanding of the conversion of plastic work into heat us- ing advanced diagnostics (digital image correlation, DIC, combined with infrared, IR, imaging). This understanding will act as a catalyst for reformulating the prevalent simplistic model, which will ultimately transform Sandia's ability to design for and predict thermomechanical behavior, impacting national security applications including nuclear weapon assessments of accident scenar- ios. Tensile 304L stainless steel dogbones are pulled in tension at quasi-static rates until failure and full-field deformation and temperature data are captured, while accounting for thermal losses. The IR temperature fields are mapped onto the DIC coordinate system (Lagrangian formulation). The resultant fields are used to calculate the Taylor-Quinney coefficient, p, at two strain rates rates (0.002 s -1 and 0.08 s -1 ) and two temperatures (room temperature, RT, and 250degC).