TY - JOUR
T1 - Effect of initial and boundary conditions on the hydrogen concentration distribution near crack tips
AU - Liu, Xiaokun
AU - Todd, Judith A.
AU - Wang, Jianjun
PY - 1996
Y1 - 1996
N2 - The Boundary Element Method was used to investigate hydrogen diffusion problems with varying initial and boundary conditions. These calculations simulated the effects of: (a) hydrogen content within metals; and (b) environmental hydrogen, on the hydrogen concentration near a crack tip, and predicted the hydrogen concentration distribution as a function of time. While the hydrogen diffusion behavior and hydrogen distribution curves depended upon initial and boundary conditions, in all cases, hydrogen was found to aggregate near the crack tip and a peak value of hydrogen concentration was observed in front of the crack tip. The hydrogen concentration near the crack tip was found to be proportional to the initial hydrogen content within the metal when C|t=0= C0 and ∂C/∂|r = 0 , and to the hydrogen concentration in the environment when C|t=0= 0 and C|r = Cb.
AB - The Boundary Element Method was used to investigate hydrogen diffusion problems with varying initial and boundary conditions. These calculations simulated the effects of: (a) hydrogen content within metals; and (b) environmental hydrogen, on the hydrogen concentration near a crack tip, and predicted the hydrogen concentration distribution as a function of time. While the hydrogen diffusion behavior and hydrogen distribution curves depended upon initial and boundary conditions, in all cases, hydrogen was found to aggregate near the crack tip and a peak value of hydrogen concentration was observed in front of the crack tip. The hydrogen concentration near the crack tip was found to be proportional to the initial hydrogen content within the metal when C|t=0= C0 and ∂C/∂|r = 0 , and to the hydrogen concentration in the environment when C|t=0= 0 and C|r = Cb.
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M3 - Article
AN - SCOPUS:0030403294
SN - 0277-027X
VL - 336
SP - 77
EP - 81
JO - American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
JF - American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
ER -