2016-Sustainable Industrial Processing Summit
SIPS 2016 Volume 7: Yang Intl. Symp. / Multiscale Material Mechanics
| Editors: | Kongoli F, Aifantis E, Wang H, Zhu T |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2016 |
| Pages: | 190 pages |
| ISBN: | 978-1-987820-48-5 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Phase field simulations on domain switching-induced toughening in ferromagnetic materials
Jie Wang1;1ZHEJIANG UNIVERSITY, Hangzhou, China;
Type of Paper: Regular
Id Paper: 408
Topic: 1
Abstract:
A real-space phase field model is employed to investigate the domain switching-induced shielding or anti-shielding of a magnetically impermeable crack in ferromagnetic materials with single and multi-domain states. Phase field simulations demonstrate that magnetization switching takes place from the crack tip due to the highly concentrated stress in a ferromagnetic thin plate with a stationary crack when the external mechanical load exceeds a critical value . Based on the stress and magnetic field obtained from phase field simulations, an I-integral method is established to calculate the crack-tip stress intensity factors (SIFs) in the ferromagnetic thin plate subjected to different values of mechanical load. The I-integral is not affected by the size of integral area and domain walls, which is applicable to the large-scale domain switching. The calculation results indicate that domain switching decreases the crack-tip stress intensity factors, resulting in domain-switching toughening in ferromagnetic materials. Furthermore, the domain switching in the multi-domain ferromagnetic plate induces a much larger decrease of stress intensity factor than in the single-domain one, which implies the multi-domain state is tougher than the single domain state for ferromagnetic materials.