A study has been carried out to evaluate the feasibility and ease of using an equation to generate the stress-strain curve for the pipe buckling parametric study. Using an equation allows the local buckling response due to various material stress-strain curves to be quantified with a few parameters and simplifies the process of developing equations to characterize the response. Since true stress-true plastic strain data are required in the finite element analysis, a power-law based equation for generating the true stress-true plastic strain curve has been adopted. It was found that parameters in the adopted power-law equation are dependent mainly on the ultimate to yield strength (proportional limit) ratio, and strain at ultimate stress measured from the end of yield plateau. Consequently, the same parameters can be used for different material yield strength (proportional limit) and length of yield plateau, and enable a more compact material property dependent non-dimensional buckling limit equations to be developed. Procedures on using the equation to generate the stress-strain curve are discussed and demonstrated.

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Conference Canadian Society for Civil Engineering Annual Conference 2009
Citation
Tan, Z., & Khoo, H. A. (2009). Generation of material stress-strain curves for the parametric study of pipeline buckling. Presented at the Canadian Society for Civil Engineering Annual Conference 2009.