Stress-life prediction of 25°C polypropylene materials based on calibration of Zhurkov fatigue life model

Su Haeng Hur, Jaehyeok Doh, Yeongmin Yoo, Sang Woo Kim, Jongsoo Lee

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


In this study, to evaluate the chemical and mechanical properties of polypropylene (PP), activation-energy and tensile tests were performed at room temperature (25°C) on pure PP and PP reinforced with glass fibre (GF). To improve the prediction accuracy of the fatigue life, three models based on the calibration of the Zhurkov model were proposed: a regression model, modified strain-rate model and lethargy coefficient-based model. Based on the experimental data analysis and statistical assessment results, we proposed a modified strain-rate model that satisfies the dependency of the physical parameters and is congruent with the predicted fatigue life data. The experimental data and modified strain-rate model were compared with the direct cyclic analysis results. The tendency of the frequency factor as a correction parameter in the modified strain-rate model corresponded to the experimental activation energy and the increasing GF content.

Original languageEnglish
Pages (from-to)1784-1799
Number of pages16
JournalFatigue and Fracture of Engineering Materials and Structures
Issue number8
Publication statusPublished - 2020 Aug 1

Bibliographical note

Funding Information:
This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF), funded by the Ministry of Science, ICT & Future Planning (2017R1A2B4009606).

Publisher Copyright:
© 2020 Wiley Publishing Ltd.

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering


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