Fatigue analysis of polycrystalline materials using Peridynamic Theory with a novel crack tip detection algorithm

Zhu N., Koçhan C., Oterkus E., Oterkus S.

OCEAN ENGINEERING, cilt.222, 2021 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 222
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1016/j.oceaneng.2021.108572
  • Dergi Adı: OCEAN ENGINEERING
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Applied Science & Technology Source, Aquatic Science & Fisheries Abstracts (ASFA), Communication Abstracts, Computer & Applied Sciences, Environment Index, ICONDA Bibliographic, INSPEC, Metadex, Civil Engineering Abstracts
  • Anahtar Kelimeler: Peridynamics, Fatigue, Polycrystal, Crack tip detection
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

This study presents prediction of crack propagation in polycrystalline materials under cyclic loads using Peridynamic (PD) theory. The PD fatigue model utilizes the strain-load cycle (epsilon-N) data and introduces the "remaining life" of each bond calculated from its cyclic strain, which changes over time. The model also captures the traditional Paris law, which is widely used for computing the fatigue crack growth. Moreover, a new crack tip detection algorithm is introduced to adaptively detect the crack tip which is necessary for the PD fatigue model. Finally, several numerical cases are considered to investigate the effect of the strength of grain boundaries and the size of grains on the fatigue behaviour of polycrystalline materials.