Hard magnetics in ultra-soft magnetorheological elastomers enhance fracture toughness and delay crack propagation
Moreno Mateos MA, Hossain M, Steinmann P, Garcia-Gonzalez D (2023)
Publication Type: Journal article
Publication year: 2023
Journal
Book Volume: 173
Article Number: 105232
DOI: 10.1016/j.jmps.2023.105232
Abstract
Pre-existing flaws in highly stretchable elastomers trigger fracture under large deformations. For multifunctional materials, fracture mechanics may be influenced by additional physical phenomena. This work studies the implications of hard magnetics on the fracture behaviour of ultra-soft magnetorheological elastomers (MREs). We experimentally demonstrate that MREs with remanent magnetisation have up to a 50% higher fracture toughness than non pre-magnetised samples. Moreover, we report crack closure due to the magnetic field as a mechanism that delays the opening of cracks in pre-magnetised MREs. To overcome experimental limitations and provide further understanding, a phase-field model for the fracture of MREs is conceptualised. The numerical model incorporates magneto-mechanical coupling to demonstrate that the stress concentration at the crack tip is smaller when the MRE is pre-magnetised. Overall, this work unveils intriguing applications for functional actuators, with better fracture behaviour and potential better performance under cyclic loading.
Authors with CRIS profile
Miguel Moreno Mateos
Lehrstuhl für Technische Mechanik
Paul Steinmann
Lehrstuhl für Technische Mechanik
Involved external institutions
United Kingdom (GB)
Spain (ES)How to cite
APA:
Moreno Mateos, M.A., Hossain, M., Steinmann, P., & Garcia-Gonzalez, D. (2023). Hard magnetics in ultra-soft magnetorheological elastomers enhance fracture toughness and delay crack propagation. Journal of the Mechanics and Physics of Solids, 173. https://dx.doi.org/10.1016/j.jmps.2023.105232
MLA:
Moreno Mateos, Miguel Angel, et al. "Hard magnetics in ultra-soft magnetorheological elastomers enhance fracture toughness and delay crack propagation." Journal of the Mechanics and Physics of Solids 173 (2023).
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