Finite element analysis of a subsurface crack on the interface of a coateh ma

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Finite element analysis of a subsurface crack on the
interface of a coateh material under a moving
compressive load
# ^& B2 b7 m  y8 {+ o( `117
K S. Leea**, J. T. Jinn” and Y. Y. Earmmeb
( @4 }& \# |* L  X) F- R$ K! e+ M“Department of Mechanical Engineering, University of ULran, San 29, Mugeodong, Namgu, Ulsan
Gyeongnam, 680-749 Seoul (Korea)
“Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology,
) f+ _/ R! q% N3 r  m, bSeoul (Korea)
' Q3 @2 u" q: l% _' ~(Received July 11, 1991; revised and accepted, October 30, 1991)
Abstract
A subsurface crack subjected to a moving compressive load is analysed with the finite
element method (FEM) considering friction on the crack surface. By comparing the FEM
results with semianalytic results of the subsurface crack in a homogeneous medium, it is
: E+ _$ z/ {9 z; s8 Ifirst verified that the present solution method gives a fairly good result. The fracture
parameters for the subsurface crack on the interface of a coated material are then evaluated
numerically for various cases such as different combinations of materials of the coating
4 W2 W$ z) D3 X( r# Olayer and the substrate, changes in the ratio of the length of the subsurface crack to the
thickness of the coating layer and changes in the coefficient of friction on the crack surface.
) m" j5 M/ Y3 U, p5 J+ }0 @! A7 _- FThe effects of the combination of materials, the geometry of the subsurface crack and the
coefficient of friction on the fracture parameters are discussed. The conditions for the
subsurface crack to propagate along the interface or to kink out of the interface are also
examined.

heihei01

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yushizixuu

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vwxy537

我是有着高尚品德的人，看到地上有钱我都懒得去捡。我就等着别人自己动手往我口袋里塞人民币！要知道，乞丐也是种高尚的职业！

valley2011

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