Effect of Workpiece/Tool Heat Transfer and Friction Coefficients on Accuracy of Simulated Temperatures and Torques in a Friction Stir Welding Plunge.

Autor: Goodson M; Mechanical Engineering Department, Brigham Young University, Provo, UT 84602, USA., Melander R; Mechanical Engineering Department, Brigham Young University, Provo, UT 84602, USA., Miles MP; Manufacturing Engineering Department, Brigham Young University, Provo, UT 84602, USA., Munro T; Mechanical Engineering Department, Brigham Young University, Provo, UT 84602, USA.
Jazyk: angličtina
Zdroj: Materials (Basel, Switzerland) [Materials (Basel)] 2023 Dec 29; Vol. 17 (1). Date of Electronic Publication: 2023 Dec 29.
DOI: 10.3390/ma17010198
Abstrakt: Friction stir process models are typically validated by tuning heat transfer and friction coefficients until measured temperatures in either the tool or workpiece, but rarely in both, match simulated results. A three-dimensional finite element model for a tool plunge in an AA 6061-T6 is validated for temperature predictions in both the tool and workpiece using a friction coefficient that varies with time. Peak workpiece temperatures were within 1.5% of experimental temperatures and tool temperatures were off by 80 °C. The sensitivity of the predicted temperatures with respect to the workpiece/tool heat transfer coefficient was shown to be high for the tool and low for the workpiece, while the spindle torque was slightly underpredicted in the best case. These results show that workpiece/tool interface properties must be tuned by considering predictions on both sides of the heat generation interface in order to ensure a reliable process simulation.
Databáze: MEDLINE
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