TY - EJOU
AU - Ko, Sun-Chien
AU - Hu, Chen-Ti
AU - Lee, Sanboh
AU - Chou, Y.T.
TI - Chemical Stresses Induced by Boundary Layer Diffusion in a Cylindrical Sandwich Composite
T2 - Computers, Materials \& Continua
PY - 2012
VL - 28
IS - 2
SN - 1546-2226
AB - The chemical stresses developed in a cylindrical sandwich composite during radial boundary layer diffusion have been investigated. The system consists of a thin layer A of circular cross section sandwiched between two semi-infinite outer layers B, with the diffusivity of diffusant in A (*D*_{A}) being much greater than that in B (*D*_{B}). Two boundary conditions, the constant surface concentration and the instantaneous surface concentration, were considered. The concentration distributions were obtained by the Bessel-Laplace transform method. The stress functions were solved analytically based on the linear elasticity. Numerical computations were performed to illustrate the effects of the diffusivity ratio (*D*_{A}/*D*_{B}) and of the thickness of the central layer A on stress distributions. The results show that the induced stress in layer A increases as the diffusivity ratio, or its thickness, increases, in consistency with the general findings for composites of rectangular geometry.
KW - Chemical stress
KW - Boundary layer diffusion
KW - Cylindrical sandwich composite
DO - 10.3970/cmc.2012.028.165