Adaptive elastic metastructures from magneto-active elastomers

Pierce, Connor; Willey, Carson L.; Chen, Vincent W.; Hardin, James O.; Berrigan, John D.; Juhl, Abigail T.; Matlack, Kathryn H.

doi:10.1088/1361-665x/ab80e4

Cited by 56 publications

(24 citation statements)

References 60 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Other types of magnetically controlled mechanical metamaterials, which utilize field-induced stiffening to exhibit field-dependent structural properties or behaviors in response to applied static or dynamic mechanical loads, have been demonstrated. 164,326,327 Active metamaterials made of magnetic soft materials have demonstrated potential for applications in unconventional soft robotics, 157,163 acoustic metastructures with tunable bandgap, 325 and smart vibrationresistant structures. 327 6.1.3.…”

Section: Applications Of Magnetic Soft Materials and Robotsmentioning

confidence: 99%

See 1 more Smart Citation

Magnetic Soft Materials and Robots

2022

View full text Add to dashboard Cite

In conventional classification, soft robots feature mechanical compliance as the main distinguishing factor from traditional robots made of rigid materials. Recent advances in functional soft materials have facilitated the emergence of a new class of soft robots capable of tether-free actuation in response to external stimuli such as heat, light, solvent, or electric or magnetic field. Among the various types of stimuli-responsive materials, magnetic soft materials have shown remarkable progress in their design and fabrication, leading to the development of magnetic soft robots with unique advantages and potential for many important applications. However, the field of magnetic soft robots is still in its infancy and requires further advancements in terms of design principles, fabrication methods, control mechanisms, and sensing modalities. Successful future development of magnetic soft robots would require a comprehensive understanding of the fundamental principle of magnetic actuation, as well as the physical properties and behavior of magnetic soft materials. In this review, we discuss recent progress in the design and fabrication, modeling and simulation, and actuation and control of magnetic soft materials and robots. We then give a set of design guidelines for optimal actuation performance of magnetic soft materials. Lastly, we summarize potential biomedical applications of magnetic soft robots and provide our perspectives on next-generation magnetic soft robots.

show abstract

Section: Applications Of Magnetic Soft Materials and Robotsmentioning

confidence: 99%

“…164,326,327 Active metamaterials made of magnetic soft materials have demonstrated potential for applications in unconventional soft robotics, 157,163 acoustic metastructures with tunable bandgap, 325 and smart vibrationresistant structures. 327 6.1.3. Programmable and Reconfigurable Surfaces.…”

Section: Applications Of Magnetic Soft Materials and Robotsmentioning

confidence: 99%

Magnetic Soft Materials and Robots

2022

View full text Add to dashboard Cite

show abstract

“…The current work is a just preliminary investigation on utilizing surface wrinkles to tune wave propagations. It has been shown that magnetic actuation can also serve as a desirable way to alter material properties or to induce finite deformation such that wave propagations can be controlled [67][68][69][70][71][72]. Consequently, other contactless loading approach as well as the dynamical behaviors of liquid crystal elastomers will be investigated in the future based on some reduced models [73,74].…”

Section: Discussionmentioning

confidence: 99%

A novel buckling pattern in periodically porous elastomers with applications to elastic wave regulations

Liu¹,

Tian²,

Fu³

et al. 2022

Preprint

View full text Add to dashboard Cite

This paper proposes a new metamaterial structure consisting of a periodically porous elastomer with pore coatings. This design enables us to engender finite deformation by a contactless load. As a case study, we apply thermal load to the pore coating and carry out a finite element analysis to probe instabilities and the associated phononic properties. It turns out that a novel buckling mode, preserving the nature of surface wrinkling in tubular structures, can be induced under a plane-strain setup, and a smaller size of the unit cell is attained compared to the counterpart of traditional buckled profile in soft porous elastomers. In particular, this buckling pattern is able to produce several bandgaps in different frequency ranges as the macroscopic mean strain increases. We further introduce a metallic core as local resonator, and the updated metamaterial allows a low-frequency bandgap, the bandgap width of which can be estimated by a simplified theoretical model. As more free parameters are involved in the structure, we perform a detailed parametric study to elucidate the influences of the modulus ratio between coating and matrix, the porosity, the core radius, and the macroscopic mean strain on the buckling initiation and the evolution of bandgap. Remarkably, a stiffer surface coating is prone to enhance the stability of the structure, which is contrary to existing results in film/substrate bilayers. It is expected that the current study could shed light on new insight into pattern formation and wave manipulation in porous elastomers.

show abstract

“…Alternatively, the use of a rotating magnetic field transforms the particle distribution to a plane-like microstructure [31]. Recently, anisotropic MAEs are also synthesized using novel 3D-printing techniques [32][33][34]. The mechanical properties of MAEs are highly sensitive to the initial shape of a sample [35][36][37][38] as well as to the particle microstructure [39][40][41].…”

Section: Introductionmentioning

confidence: 99%

Magneto-Mechanical Enhancement of Elastic Moduli in Magnetoactive Elastomers with Anisotropic Microstructures

Chougale¹,

Romeis²,

Saphiannikova³

2022

Materials

View full text Add to dashboard Cite

Magnetoactive elastomers (MAEs) have gained significant attention in recent years due to their wide range of engineering applications. This paper investigates the important interplay between the particle microstructure and the sample shape of MAEs. A simple analytical expression is derived based on geometrical arguments to describe the particle distribution inside MAEs. In particular, smeared microstructures are considered instead of a discrete particle distribution. As a consequence of considering structured particle arrangements, the elastic free energy is anisotropic. It is formulated with the help of the rule of mixtures. We show that the enhancement of elastic moduli arises not only from the induced dipole–dipole interactions in the presence of an external magnetic field but also considerably from the change in the particle microstructure.

show abstract

Adaptive elastic metastructures from magneto-active elastomers

Cited by 56 publications

References 60 publications

Magnetic Soft Materials and Robots

Magnetic Soft Materials and Robots

A novel buckling pattern in periodically porous elastomers with applications to elastic wave regulations

Magneto-Mechanical Enhancement of Elastic Moduli in Magnetoactive Elastomers with Anisotropic Microstructures

Contact Info

Product

Resources

About