What question did this study set out to answer?

The aim is to develop a reliable method to predict the ductile failure lifetime of polyethylene pipes using the critical strain criterion.

June 4, 2026Applied SciencesOpen Access

Creep-Based Ductile Failure Lifetime Estimation of Polyethylene Pipes Using Critical Strain Criterion

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Randomized trial investigates ductile failure lifetime prediction in polyethylene pipes, suggesting a robust method for safety evaluation.

The aim is to develop a reliable method to predict the ductile failure lifetime of polyethylene pipes using the critical strain criterion.
Creep tests on polyethylene pipes at various temperature and stress levels
Analysis of four commercial pipes: two PE80 and two PE100 grades
Use of time-hardening model to describe viscoelastic creep behavior
Predicted failure times match well with actual measurements from hydrostatic tests (exact metrics not provided)
The method offers a high-efficiency alternative to conventional long-term hydrostatic tests
The approach supports improved material selection and safety evaluation for PE pipelines

Tang et al. (2026) studied this question.

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Randomized trial investigates ductile failure lifetime prediction in polyethylene pipes, suggesting a robust method for safety evaluation.