A Micromechanically Motivated Constitutive Model for Magnetostrictive Materials With Rate Effects

R, Sathish Kumar; Jayabal, K.

doi:10.1109/tmag.2018.2882542

Cited by 1 publication

(4 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The micromechanically motivated uniaxial model developed for representing the complex responses of magnetostrictive materials in [37] is extended for plane problems in the present work. From a two-dimensional perspective, among the six easy axes of Galfenol, only four are considered for model development along xz-plane as shown in figure 2.…”

Section: Model Developmentmentioning

confidence: 99%

“…After computing the global d.o.f from (37), the global magnetomechanical flux co-efficients are evaluated using (34). Finally, the magnetomechanical flux coefficients are calculated at element level with (31).…”

Section: Coupled Hybrid Formulationmentioning

confidence: 99%

“…Step 5 After computing the global d.o.f. from (37), the elemental variables T i , B R i , S R i and H i are calculated by substituting (34) in (31) and using (37).…”

Section: Numerical Proceduresmentioning

confidence: 99%

“…In addition, a new microscopically motivated modelling approach correlating the macroscopic responses to microscale events, like domain rotations using thermodynamic energy potential was presented as an uniaxial [37] and two-dimensional constitutive model [38]. Significantly, the volume fractions of the microscopic domains were used as internal variables to define the macroscopic state of the material under magnetomechanical loads.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A rate-dependent constitutive model incorporated in two-dimensional PolyFEM for Galfenol sensors

R¹,

Jayabal²

2021

Modelling Simul. Mater. Sci. Eng.

Self Cite

View full text Add to dashboard Cite

A micromechanical model with rate effects is developed to constitute the nonlinear hysteresis sensor behaviour of Galfenol and embedded into a numerical framework, the polygonal finite element method. The model stems from the domain rotation events taking place at microlevel in response to the external magnetomechanical loads. The internal variables of the model to represent the material state at any instant are the volume fraction of the domains, and their evolution equations are derived using thermodynamic principles. Inter-domain effects within each grain are accounted in the form of back fields that act as hardening or softening parameters. The constitutive model is extended further to include the rate effects and then incorporated into a hybrid-magnetomechanical-formulation with Voronoi-based-discretization to study the behaviour of Galfenol. The Voronoi discretizations closely resemble the microstructure of Galfenol with each finite element specifying a random grain in the polycrystalline Galfenol. The developed framework is shown to simulate the major and minor loop sensor responses of the material with rate effects under complex loading conditions.

show abstract

Section: Model Developmentmentioning

confidence: 99%

Section: Coupled Hybrid Formulationmentioning

confidence: 99%

“…Step 5 After computing the global d.o.f. from (37), the elemental variables T i , B R i , S R i and H i are calculated by substituting (34) in (31) and using (37).…”

Section: Numerical Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations