PSI - Issue 16

Ivan Shtoyko et al. / Procedia Structural Integrity 16 (2019) 148–152 Ivan Shtoyko, Jesús Toribio, Viktor Kharin, Myroslava Hredil / Structural Integrity Procedia 00 (2019) 000 – 000

152

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The problem was analysed basing on the first law of thermodynamics, and it was reduced to a certain mathematical model in terms of the differential equation system. Solving the system of the derived differential equations with the initial and final conditions for determination of the changes of the crack semi-axes, the relation was obtained to determine the pipe residual lifetime. Based on it, the dependence of pipe residual lifetime on initial crack depth and pipe operation time was derived. It was concluded that the residual lifetime of the pipe strongly depended on its initial operation time.

Acknowledgements

This research was supported by the NATO in the Science for Peace and Security Programme under the Project G5055.

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