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- Title
Fracture Behavior of Cracked Giant Magnetostrictive Materials in Three-Point Bending under Magnetic Fields: Strain Energy Density Criterion.
- Authors
Colussi, Marco; Berto, Filippo; Mori, Kotaro; Narita, Fumio
- Abstract
In this paper, the fracture behavior of cracked giant magnetostrictive materials has been investigated both numerically and experimentally. Works in literature have been revisited, focusing on iron and rare-earth alloys, such as Terfenol-D. Three-point bending tests have been carried out on precracked specimens and the fracture loads have been measured in the presence and absence of a magnetic field. Recent studies on local stress fields in proximity of crack tips have shown that the Strain Energy Density (SED) can be a robust parameter in the brittle fracture assessment. Coupled-field finite element analyses have then been performed and the effect of the magnetic field on Terfenol-D fracture resistance has been discussed in terms of Energy Release Rate and averaged SED.
- Subjects
MAGNETIC materials; FRACTURE mechanics; MAGNETIC fields
- Publication
Advanced Engineering Materials, 2016, Vol 18, Issue 12, p2063
- ISSN
1438-1656
- Publication type
Article
- DOI
10.1002/adem.201500533