This paper assesses the uncertainty in the collapse strength prediction of sandwich pipelines under external pressure with various strength models in three categories based on interlayer adhesion conditions. First the models available in public domain for collapse strength predictions are adopted and their key features are discussed. Next, the validity of models is verified against sandwich pipeline collapse tests data collected from literature. The models’ accuracy of strength prediction is compared through mean and standard deviation.Model uncertainty factor are derived for the adopted models and their applicability is discussed. Later, through deterministic collapse strength predictions by models, parametric analysis is conducted, illustrating insights of models behaviour for a wide range of design configurations. Furthermore, the uncertainty among different models’ predictions is perceived at different configurations of outer and inner pipe and core thickness. A case study for a realistic sandwich pipeline is constituted and probabilistic modelling is applied to basic design parameters. Uncertainty propagation of models predictions is assessed by Monte Carlo simulation method. Finally, sandwich pipes models’ predictions are also compared to an equivalent single walled pipe.The results of present analysis can provide guidance for pipe industry in connection to early design and operational safety of sandwich pipelines.

Uncertainty in Collapse Strength Prediction of Sandwich Pipelines

Paper Proceedings: https://asmedigitalcollection.asme.org/OMAE/OMAE2021/volume/85116

OMAE 2021

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