WJ JIANG and J Zhang
Keywords: Pipe corrosion, corrosion defect, von Mises stress distribution, plastic strain
Abstract:
<p class="MsoNormal" style="line-height:150%">Corrosion is one of the
important factors affecting pipe safety. By establishing different corrosion
models, the von Mises stress and strain distribution of pipe under different
corrosion forms was studied, and the influence of the structural parameters of
corrosion pit on the mechanical properties of pipe under the same corrosion
form was explored. The results show that under internal pressure, the high von
Mises stress and large strain region of the pipe appears on the axis of the
corrosion pit and expands along the axis with the increase of internal
pressure; four-point corrosion pit has the most obvious effect on the
mechanical properties of the pipe. The larger the corrosion pit radius is, the
greater the pipe von Mises stress and plastic strain is. With the corrosion pit
spacing increases, the pipe von Mises stress and plastic strain decrease.</p>
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