PSI - Issue 43

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 43 (2023) 9–14

© 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under the responsibility of MSMF10 organizers. © 20 23 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under the responsibility of MSMF10 organizers. Abstract N nometric cutting of a single crystal copper workpiece of dif er nt crystallographic orientati ns by a stiff cylindrical cubic diam nd tool has been i vestigated by MD simulations us ng the freeware LAMMPS. The chip evolve during the cutting process and forms d pending on cry tal orientati n, cutting velocity and tool geometry. It was found that no significant differ nce in the cu ing force magnitude was observed for different crystallographic ori ntations despite significant differences in deform tion patterns. After tool passage th urface is sm th nd no l tic recovery was detected. Instead, a g ain structure with areas surround d by dislo ation clusters form in the tool wake. Increasing the cutting velocity promotes chip formation and chip folding, thus increasing the chip thickness. © 20 23 The Authors. Published by Elsevier B.V. This is an ope access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under the responsibility of MSMF10 organizers. 10th International Conference on Materials Structure and Micromechanics of Fracture Molecular dynamics simulations of nanometric cutting of single crystal copper sheets using a diamond tool Kevin Blixt a , Lea Christierson a , Aylin Ahadi a, Per Hansson a , Solveig Melin a* a Division of Mechanics, Lund University, PO BOX118, SE22100 Lund, Sweden Abstract Nanometric cutting of a single crystal copper workpiece of different crystallographic orientations by a stiff cylindrical cubic diamond tool has been investigated by MD simulations using the freeware LAMMPS. The chip evolves during the cutting process and forms depending on crystal orientation, cutting velocity and tool geometry. It was found that no significant difference in the cutting force magnitude was observed for different crystallographic orientations despite significant differences in deformation patterns. After tool passage the surface is smooth and no elastic recovery was detected. Instead, a grain structure with areas surrounded by dislocation clusters form in the tool wake. Increasing the cutting velocity promotes chip formation and chip folding, thus increasing the chip thickness. 10th International Conference on Materials Structure and Micromechanics of Fracture Molecular dynamics simulations of nanometric cutting of single crystal copper sheets using a diamond tool Kevin Blixt a , Lea Christierson a , Aylin Ahadi a, Per Hansson a , Solveig Melin a* a Division of Mechanics, Lund University, PO BOX118, SE22100 Lund, Sweden 1. Introduction Resource efficient material use with a minimum of waste at low cost permeates all sustainable development. Todays advanced technology relies on miniaturized components, with below-micron linear measures and with demands on nanometre surface finish. Such components are part of every-day consumer products as mobile phones or medical instruments. One attractive way to produce the complicated three-dimensional micro electric mechanical systems 1. Introduction Resource efficient material use with a minimum f waste at low c st permeates all sustainable development. Todays advanced technology relies on miniaturized com onents, with below-micron linear measures and with demands on nanometre surface finish. Such com onents are part of every-day consumer products as mobile phones or medical instruments. One attractive way to produce the complicated three-dimensional micro electric mechanical systems Keywords: Nano-cutting; Molecular dynamics; Single crystal copper, Chip formation; Cutting forces Keywords: Nano-cutting; Molecular dynamics; Single crystal copper, Chip formation; Cutting forces

* Corresponding author. Tel.: +0-000-000-0000 E-mail address: solveig.melin@mek.lth.se * Correspon ing author. Tel.: +0-000-000-0000 E-mail address: solveig.melin@mek.lth.se

2452-3216 © 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under the responsibility of MSMF10 organizers. 2452-3216 © 2023 The Authors. Published by Elsevier B.V. This is an ope access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under the responsibility of MSMF10 organizers.

2452-3216 © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under the responsibility of MSMF10 organizers. 10.1016/j.prostr.2022.12.227