A new load-dependent hysteresis model for magnetostrictive materials

Valadkhan, Sina; Morris, Kirsten; Shum, Alex

doi:10.1088/0964-1726/19/12/125003

Cited by 21 publications

(12 citation statements)

References 29 publications

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“…At this field level, the right-hand minimum M Ã þ disappears and the magnetization moves rapidly to the left-hand equilibrium M Ã À . The above model can be improved in a number of respects; for instance by modifying the Gibb's energy to include a more accurate description of the effect of magnetostriction [32,33].…”

Section: Smart Materialsmentioning

confidence: 99%

What is Hysteresis?

Morris

2011

Applied Mechanics Reviews

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Hysteresis is a widely occurring phenomenon. It can be found in a wide variety of natural and constructed systems. Generally, a system is said to exhibit hysteresis when a characteristic looping behavior of the input-output graph is displayed. These loops can be due to a variety of causes. Furthermore, the input-output graphs of periodic inputs at different frequencies are generally identical. Existing definitions of hysteresis are useful in different contexts but fail to fully characterize it. In this paper, a number of different situations exhibiting hysteresis are described and analyzed. The applications described are: an electronic comparator, gene regulatory network, backlash, beam in a magnetic field, a class of smart materials and inelastic springs. The common features of these widely varying situations are identified and summarized in a final section that includes a new definition for hysteresis.

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Section: Smart Materialsmentioning

confidence: 99%

What is Hysteresis?

Morris

2011

Applied Mechanics Reviews

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“…Magnetostrictive materials, a class of smart materials, exhibit deformation under different forms of inputs such as stress, temperature, moisture, pH and electric or magnetic field (Tan and Baras, 2004). Such materials exhibit strong coupling between the mechanical and magnetic states, and thus produce mechanical stress and strain output due to change in input magnetic field (current).…”

Section: Introductionmentioning

confidence: 99%

“…Feng et al: A Modified Prandtl-Ishlinskii Hysteresis Modeling Method characteristics of magnetostrictive actuators have shown that the nonlinearities mainly include hysteresis exhibiting strong non-smooth and multi-value properties (Smith, 2005). Some studies have also shown that the hysteresis nonlinearity is strongly coupled with the working conditions such as mechanical load and input frequency (Rongge et al, 2005;Valadkhan et al, 2010;Niu et al, 2017). However, such nonlinearities in the magnetostrictive actuated systems cannot be easily linearized or modelled using conventional methods.…”

Section: Introductionmentioning

confidence: 99%

“…Kuhnen (2003) employed a summation of weighted nonlinear and memoryless deadband operators to relax symmetry of the classical PI model so as to describe saturation nonlinearities. Another study proposed dissimilar envelop functions under increasing and decreasing inputs to formulate generalized play operators for describing output asymmetry (Valadkhan et al, 2010). The effectiveness of the afore-mentioned operatorbased models in predicting rate-dependent and asymmetric hysteresis has been demonstrated through comparisons with measured input-output characteristics of the magnetostrictive and piezoceramic actuators (Rongge et al, 2005;Liu et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…In Zhang et al (2013), a magnetostrictive actuated platform was conducted to show input-output hysteresis properties considering the external stress under the fixed operating frequency, and a stress-dependent PI hysteresis model was subsequently proposed to show the negative effects from the load. In Valadkhan et al (2010), the considerable variations in the actuator output was showed with changes in the mechanical loads in addition to hysteresis coupled with strong time-delays.…”

Section: Introductionmentioning

confidence: 99%

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A Modified Prandtl-Ishlinskii Hysteresis Modeling Method with Load-dependent Delay for Characterizing Magnetostrictive Actuated Systems

Feng

Rakheja

et al. 2018

Mech. Sci.

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Abstract. The actuating precision of a micro-positioning system, driven by a magnetostrictive actuator, is adversely limited by its nonlinearities, particularly the output-input hysteresis, which are further affected by the operating load and input frequency. In this paper, the output-input properties of a magnetostrictive actuated system are experimentally characterized considering a wide range of operating frequencies and loads. The measured data revealed that the hysteresis behaviour is strongly affected with a change of operating load, and a modified Prandtl-Ishlinskii model with load-dependent delay is subsequently formulated to describe the nonlinear characteristics of the magnetostrictive actuated system in terms of major and minor loop hysteresis, and output magnitude and phase responses. The proposed model integrates a load-delay function related to the load mass with the Prandtl-Ishlinskii hysteresis model so as to fully describe the coupled nonlinear delay effects of the system output. The validity of the proposed model is demonstrated through comparisons with the experimental data for a range of operating loads and frequencies. It is shown that the proposed model can accurately describe the load-dependent hysteresis effects of the magnetostrictive actuated system up to certain input frequencies.

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Reconfigurable Mechanical Anisotropy in Self‐Assembled Magnetic Superstructures

et al. 2021

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Enhancement of mechanical properties in self-assembled superstructures of magnetic nanoparticles is a new emerging aspect of their remarkable collective behavior. However, how magnetic interactions modulate mechanical properties is, to date, not fully understood. Through a comprehensive Monte Carlo investigation, this study demonstrates how the mechanical properties of self-assembled magnetic nanocubes can be controlled intrinsically by the nanoparticle magnetocrystalline anisotropy (MA), as well as by the superstructure shape anisotropy, without any need for changes in structural design (i.e., nanoparticle size, shape, and packing arrangement). A low MA-to-dipolar energy ratio, as found in iron oxide and permalloy systems, favors isotropic mechanical superstructure stabilization, whereas a high ratio yields magnetically blocked nanoparticle macrospins which can give rise to metastable superferromagnetism, as expected in cobalt ferrite simple cubic supercrystals. Such full parallel alignment of the particle moments is shown to induce mechanical anisotropy, where the superior high-strength axis can be remotely reconfigured by means of an applied magnetic field. The new concepts developed here pave the way for the experimental realization of smart magneto-micromechanical systems (based, e.g., on the permanent super-magnetostriction effect illustrated here) and inspire new design rules for applied functional materials.Self-assembly of magnetic nanoparticles of different sizes and shapes has been successfully applied to design superstructured materials of novel morphologies, including helices, rods, stripes, supercubes, and labyrinths. [1][2][3][4] Such magnetic superstructures

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A new load-dependent hysteresis model for magnetostrictive materials

Cited by 21 publications

References 29 publications

What is Hysteresis?

What is Hysteresis?

A Modified Prandtl-Ishlinskii Hysteresis Modeling Method with Load-dependent Delay for Characterizing Magnetostrictive Actuated Systems

Reconfigurable Mechanical Anisotropy in Self‐Assembled Magnetic Superstructures

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