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Steady-State Analysis of Buckle Propagation

by Andr? Nogueira, (A.M.ASCE), Datum Engineering Inc, Austin, United States,
John L. Tassoulas, (M.ASCE), Datum Engineering Inc, Austin, United States,



Document Type: Proceeding Paper

Part of: Structures Congress XII

Abstract:

A novel finite element technique for the analysis of buckle propagation in pipelines is presented. The propagation pressure, propagation profile, the state of stress, and deformation during propagation are calculated accurately and efficiently. The procedure takes advantage of the steady-state nature of propagation and requires relatively low computational effort. In addition, finite elastoplastic strain is modeled rigorously by means of a convected coordinate system. Parametric studies are conducted for different materials over a range of values of the diameter-to-thickness ratio (D/t). The results are in excellent agreement with experimental data.

Subject Headings: Finite element method | Steady states | Pipelines | Elastoplasticity | Deformation (mechanics) | Stress analysis | Strain

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