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Research Papers

An Investigation On Deformation-Based Surface Texturing

[+] Author and Article Information
Rui Zhou

 Department of Mechanical Engineering, Northwestern University, Evanston, IL60208rzhou@u.northwestern.edu

Jian Cao1

 Department of Mechanical Engineering, Northwestern University, Evanston, IL60208jcao@northwestern.edu

Kornel Ehmann

 Department of Mechanical Engineering, Northwestern University, Evanston, IL60208k-ehmann@northwestern.edu

Chun Xu

 Shanghai Institute of Technology, Shanghai, ChinaXuchun1963@163.com

1

Corresponding author.

J. Manuf. Sci. Eng 133(6), 061017 (Dec 15, 2011) (6 pages) doi:10.1115/1.4005459 History: Received March 26, 2011; Revised November 17, 2011; Published December 15, 2011; Online December 15, 2011

Surface textures have various applications, such as friction/wear reduction and light absorbing enhancement. Deformation-based surface texturing has the potential of economically creating micro-scale surface textures over a large surface area. A novel desktop surface texturing system is proposed for efficiently and economically fabricating microchannels on the surface of thin sheet material for microfluid and friction/wear reduction applications. Both the experimental and numerical studies were employed to analyze the problems of the flatness of the textured sheet, the uniform of the channel depth and pile-ups built up during the surface texturing process. The results demonstrated a clear relationship between relative velocity of the upper and lower rolls and the flatness of the textured sheet and the final profile of the microchannels.

Copyright © 2011 by American Society of Mechanical Engineers
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Figures

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Figure 1

Schematic of friction reduction through surface texturing

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Figure 2

Schematic of desktop surface texturing system

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Figure 3

Schematic of rolls with microchannel features

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Figure 4

Schematic of flexure bearing house

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Figure 5

Desktop surface texturing system

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Figure 6

(a) 3D image and (b) cross-section view of one channel

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Figure 7

AA5052 sheets textured with microchannels

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Figure 8

Surface textures with (a) microchannel array and (b) grid pattern

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Figure 9

Bending of the sheet after top surface texturing due to larger deformation of the top half of the sheet

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Figure 10

Surface texturing with (a) symmetric and (b) asymmetric rolling speed

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Figure 11

AA5052 sheets textured with different relative velocities (from top to bottom: 0 mm/s, 0.2 mm/s and 2 mm/s)

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Figure 12

Finite element simulation and stress contour

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Figure 13

Relationship between curvature and relative velocity

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Figure 14

Profile of channels along the rolling direction

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Figure 15

Channel depth along the transverse direction

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