Numerical assessment of transition in cutting mode and its effect on roughness creation

Wenbin  Zheng; Li Ma; Shiyuan  Pei; Ramin Aghababaei

doi:10.1016/j.ijmecsci.2023.108666

Numerical assessment of transition in cutting mode and its effect on roughness creation

Wenbin Zheng, Li Ma, Shiyuan Pei, Ramin Aghababaei^*

^*Corresponding author af dette arbejde

Institut for Mekanik og Produktion - Mekanik og Materialer

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avis › Tidsskriftartikel › Forskning › peer review

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Abstract

Ductile-to-brittle transition in cutting mode is an important phenomenon in the ultra-precision machining and surface finish of brittle materials. Using a newly-developed coarse-grained molecular dynamics technique, we systematically explore the effect of depth of cut on the cutting mode and the evolution of roughness. Our simulations demonstrate that the transitional depth of cut (TDoC) model accurately predicts the material removal mechanisms, which are affected by both the material's properties and the cutting depth. When the cutting depth increases, the operating mechanism shifts from shearing-induced serrated chip formation to cleavage-cracking chip breakage. The RMS roughness study demonstrates that the roughness is a direct outcome of the chip formation mechanism and is, in general, higher when chip breakage occurs.

Originalsprog	Engelsk
Artikelnummer	108666
Tidsskrift	International Journal of Mechanical Sciences
Vol/bind	261
Antal sider	9
ISSN	0020-7403
DOI	https://doi.org/10.1016/j.ijmecsci.2023.108666
Status	Udgivet - jan. 2024

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10.1016/j.ijmecsci.2023.108666

1-s2.0-S0020740323005684-mainForlagets udgivne version, 3,72 MBLicens: CC BY

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title = "Numerical assessment of transition in cutting mode and its effect on roughness creation",

abstract = "Ductile-to-brittle transition in cutting mode is an important phenomenon in the ultra-precision machining and surface finish of brittle materials. Using a newly-developed coarse-grained molecular dynamics technique, we systematically explore the effect of depth of cut on the cutting mode and the evolution of roughness. Our simulations demonstrate that the transitional depth of cut (TDoC) model accurately predicts the material removal mechanisms, which are affected by both the material's properties and the cutting depth. When the cutting depth increases, the operating mechanism shifts from shearing-induced serrated chip formation to cleavage-cracking chip breakage. The RMS roughness study demonstrates that the roughness is a direct outcome of the chip formation mechanism and is, in general, higher when chip breakage occurs.",

keywords = "Chip breakage, Cutting depth, Ductile–brittle transition, Surface finish",

author = "Wenbin Zheng and Li Ma and Shiyuan Pei and Ramin Aghababaei",

year = "2024",

month = jan,

doi = "10.1016/j.ijmecsci.2023.108666",

language = "English",

volume = "261",

journal = "International Journal of Mechanical Sciences",

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T1 - Numerical assessment of transition in cutting mode and its effect on roughness creation

AU - Zheng, Wenbin

AU - Ma, Li

AU - Pei, Shiyuan

AU - Aghababaei, Ramin

PY - 2024/1

Y1 - 2024/1

N2 - Ductile-to-brittle transition in cutting mode is an important phenomenon in the ultra-precision machining and surface finish of brittle materials. Using a newly-developed coarse-grained molecular dynamics technique, we systematically explore the effect of depth of cut on the cutting mode and the evolution of roughness. Our simulations demonstrate that the transitional depth of cut (TDoC) model accurately predicts the material removal mechanisms, which are affected by both the material's properties and the cutting depth. When the cutting depth increases, the operating mechanism shifts from shearing-induced serrated chip formation to cleavage-cracking chip breakage. The RMS roughness study demonstrates that the roughness is a direct outcome of the chip formation mechanism and is, in general, higher when chip breakage occurs.

AB - Ductile-to-brittle transition in cutting mode is an important phenomenon in the ultra-precision machining and surface finish of brittle materials. Using a newly-developed coarse-grained molecular dynamics technique, we systematically explore the effect of depth of cut on the cutting mode and the evolution of roughness. Our simulations demonstrate that the transitional depth of cut (TDoC) model accurately predicts the material removal mechanisms, which are affected by both the material's properties and the cutting depth. When the cutting depth increases, the operating mechanism shifts from shearing-induced serrated chip formation to cleavage-cracking chip breakage. The RMS roughness study demonstrates that the roughness is a direct outcome of the chip formation mechanism and is, in general, higher when chip breakage occurs.

KW - Chip breakage

KW - Cutting depth

KW - Ductile–brittle transition

KW - Surface finish

U2 - 10.1016/j.ijmecsci.2023.108666

DO - 10.1016/j.ijmecsci.2023.108666

M3 - Journal article

SN - 0020-7403

VL - 261

JO - International Journal of Mechanical Sciences

JF - International Journal of Mechanical Sciences

M1 - 108666

ER -

Numerical assessment of transition in cutting mode and its effect on roughness creation

Abstract

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