- Tytuł:
- The development of two multiaxial ductility factor predicting models based on creep cavity growth theory
- Autorzy:
-
Wu, Dongquan
Li, Yupeng
Liu, Zixiang
Li, Dinghe - Tematy:
-
multiaxial ductility factor
cavities growth theory
power-law creep
multiaxial stress state - Pokaż więcej
- Wydawca:
- Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
- Powiązania:
- https://bibliotekanauki.pl/articles/59114488.pdf Link otwiera się w nowym oknie
- Opis:
- In this study, the multiaxial ductility factor was analyzed based on the power-law creep grain-boundary cavities growth theory under multiaxial stress states. Based on this theory, the theoretical cavities growth rates under a multiaxial stress state were discussed and the predicting model of a stress-state parameter α was revised by using an empirical fitting expression denoted as αWu, which exhibited a good agreement to analytical results of the stress-state parameter α and multiaxial cavities growth rates. Then, according to the re- lationship between uniaxial and multiaxial creep failure strain, a new empirical predicting model of multiaxial ductility factor MDFWu was established which involved the multiax- ial parameter αWu and uniaxial parameter α0. Besides, the theoretical model of multiaxial ductility factor MDF could also be established. By fitting the theoretical values of MDF, an- other predicting model MDFWM was proposed. The development of two multiaxial ductility factor predicting models could be achieved. Finally, predictions of these two novel multiax- ial ductility factor models and the Cocks-Ashby as well as Wen-Tu model were compared with experimental data, and the prediction accuracy of MDFWu and MDFWM models was significantly improved, especially for the latter one.
- Dostawca treści:
- Biblioteka Nauki
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