کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
801568 | 1467671 | 2015 | 5 صفحه PDF | دانلود رایگان |
• The problem of three-stage corrosion of a thick sphere is solved analytically.
• The corrosion rates are piecewise linear functions of the maximum principal stress.
• Possible inhibition of corrosion is taken into account.
• The effect of stress corrosion thresholds on the durability of shells is considered.
• The solution can serve as a benchmark for numerical studies.
The paper presents an analytical solution to Lamé's problem for a hollow sphere with unknown evolving boundaries. The double-sided uniform corrosion of a linearly elastic thick-walled spherical shell under internal and external pressure is considered. It is assumed that the corrosion rates are piecewise linear functions of the maximum principal stress on the related surface, and exponentially decaying with time. The corrosion process is supposed to be divided into three successive stages: constant rate double-sided corrosive wear, a stage of corrosion accelerated on only one of the surfaces of the shell, and a double-sided mechanochemical corrosion. Closed-formed expressions for all the consecutive stages are obtained with their junction points (corresponding to stress corrosion thresholds) being taken into account.
Journal: Mechanics Research Communications - Volume 65, April 2015, Pages 30–34