Fatigue analysis of polycrystalline materials using Peridynamic Theory with a novel crack tip detection algorithm
OCEAN ENGINEERING, vol.222, 2021 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 222
- Publication Date: 2021
- Doi Number: 10.1016/j.oceaneng.2021.108572
- Journal Name: OCEAN ENGINEERING
- Journal Indexes: 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
- Keywords: Peridynamics, Fatigue, Polycrystal, Crack tip detection
- Dokuz Eylül University Affiliated: Yes
Abstract
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.