Corrosive destruction of prismatic bar of circular cross-section under pure bending
DOI:
https://doi.org/10.15587/1729-4061.2015.40956Keywords:
prismatic bar, pure bending, stress-corrosion cracking, corrosion rate, corrosion wearAbstract
The problem of determining the time before the corrosive destruction of the straight bar of circular cross-section, which is subjected to pure bending in a corrosive medium was solved. The following cases were investigated: bar corrosion process does not depend on the stress caused by its pure bending in a corrosive medium; bar corrosion process essentially depends on its stress. The rate of the bar radius change in the corrosion process is considered to be linearly dependent on its stress during pure bending deformation. Formulas that express the dependence of stress, radius, limit wear time and cracking time of the bar on the specified corrosion process parameters and given bending moment were derived. Using the formulas obtained, the graphs of dependence of full wear time and cracking time on the bar stress at the initial time point were constructed. Also, the graph of the bar radius change (decrease) in time during the corrosion process was plotted.
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