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Finite element analysis of a subsurface crack on the
% s. `/ C! j, [# E& B5 p, q3 Xinterface of a coateh material under a moving
3 s1 w/ ]; m/ Y6 @. ?; @+ K* c& @compressive load4 R* u+ y* }1 v3 x) Z
117
L/ m3 E) J; U y+ f" tK S. Leea**, J. T. Jinn” and Y. Y. Earmmeb
7 g& M( B% Q; D9 t0 u- U“Department of Mechanical Engineering, University of ULran, San 29, Mugeodong, Namgu, Ulsan
3 A8 z" Z5 _* R2 p6 I- m. J f( ~Gyeongnam, 680-749 Seoul (Korea)1 [* q$ l/ e( O# @: w3 e
“Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology,
, _' n$ M. n* `; @ z A" S+ e4 G1 ~Seoul (Korea)1 D3 e$ D, D7 \/ k6 w$ @
(Received July 11, 1991; revised and accepted, October 30, 1991)0 b# l3 F& ?5 Z
Abstract
2 | r; U l& G5 m; |3 G( W* {1 sA subsurface crack subjected to a moving compressive load is analysed with the finite" b U( ]5 Y0 W- a5 c/ m3 O
element method (FEM) considering friction on the crack surface. By comparing the FEM2 ^) I1 @$ C& J5 T& r$ y
results with semianalytic results of the subsurface crack in a homogeneous medium, it is4 Z! y2 A6 T' a+ |6 R. \2 Q0 k; ~) x
first verified that the present solution method gives a fairly good result. The fracture
' v) U# n" J2 d! I i( \# n7 Iparameters for the subsurface crack on the interface of a coated material are then evaluated2 b# s* S: h5 W' H3 ?' E* f
numerically for various cases such as different combinations of materials of the coating/ n: g4 C* C) ~3 G: N Y6 v
layer and the substrate, changes in the ratio of the length of the subsurface crack to the
) t1 C) `5 l2 o% N1 J. Hthickness of the coating layer and changes in the coefficient of friction on the crack surface.
2 V- T, W) q; QThe effects of the combination of materials, the geometry of the subsurface crack and the; \; P( v' V1 [' V* F! V' F
coefficient of friction on the fracture parameters are discussed. The conditions for the
, B9 M% X4 q. L) Qsubsurface crack to propagate along the interface or to kink out of the interface are also2 ]2 q) e* Y; O9 R# r& p4 ]
examined. |
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