Stretch-independent magnetization in incompressible isotropic hard magnetorheological elastomers

• DOI: 10.1016/j.jmps.2024.105764
• Publication Date: 2024-07-02T16:20:07Z
• Authors: Kostas Danas; Pedro M. Reis

Recent studies on magnetically hard, particle-filled magnetorheological elastomers (h-MREs) have revealed their stretch-independent magnetization response after full pre-magnetization. We discuss this phenomenon, focusing incompressible, isotropic, h-MREs. demonstrate that the fully dissipative model of Mukherjee et al. (2021) for arbitrary loads can be reduced, under physically consistent assumptions, to energetic Yan (2023), but not Zhao (2019). The latter two are valid small magnetic fields around an already known pre-magnetized state. When h−MRE undergoes non-negligible stretching, (2019) yields predictions disagree with experiments due its inherent stretch-dependent response. In contrast, and (2023) models able accurately capture important feature present in pre-stretched However, inextensible slender structures bending deformation, where stretching is negligible, provides satisfactory despite underlying assumptions. Our analysis reveals that, model, related internal variable cannot formally used as one, except ideal magnets, subject constitutive Furthermore, vector alone insufficient describe MRE solid; introduction one original Maxwell necessary a complete representation.