Residual Stress Induced by Waterjet Peening: A Finite Element Analysis

[+] Author and Article Information
S. Kunaporn, M. Ramulu

University of Washington, Seattle, WA 98195  

M. G. Jenkins

University of Detroit Mercy, Detroit, MI 48221  

M. Hashish

Flow International, Kent, WA

J. Pressure Vessel Technol 126(3), 333-340 (Aug 18, 2004) (8 pages) doi:10.1115/1.1767175 History: Received August 05, 2003; Revised November 01, 2003; Online August 18, 2004
Copyright © 2004 by ASME
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Graphic representation of the waterjet peening process
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Schematic of pressure profile across a cross section of the jet at any SODs using the proposed mathematical model calculated using ps=310 MPa,u=12.7 mm/s, and dn=0.33 mm25
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Finite element discretization of the three-dimensional geometry
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Contour of von Mises equivalent stresses at the load at which yielding is observed using the Leach & Walker pressure distribution
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Contour of the equivalent stress: (a) loading and (b) unloading
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Distribution of the ratio of equivalent stress to the yield strength (σeq/Sy) compared between (a) loading to the maximum load, and (b) unloading to zero
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Contours of the stresses as compared between loading and unloading: (a)–(b) the radial stress, σrr, (c)–(d) the tangential stress, σθθ and (e)–(f ) the perpendicular stress, σzz
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Stresses on the surface at loading and unloading: (a) radial stress, σrr (b) tangential stress, σθθ, and (c) normal stress, σzz.
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The stresses along the axis of symmetry at loading and unloading: (a) the radial stress, σrr, (b) the tangential stress, σθθ, and (c) the perpendicular stress, σzz.
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(a) Residual stress distribution versus depth and (b) its corresponding hardness distribution of the specimen waterpeened using ps=310 MPa, and f=12.7 mm/s
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Residual stress and surface displacement under varying applied impact pressure
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Surface residual stress distibution versus radial distance: (a) surface radial residual stresses, σrr, and (b) surface tangential stress, σθθ
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Subsurface residual stress distribution versus depth from the surface: (a) surface radial residual stress, σrr, and (b) surface tangential stress, σθθ




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