Constitutive models of artificial muscles: a review

Wang, Huiming; Qu, Shaoxing

doi:10.1631/jzus.a1500207

Cited by 21 publications

(17 citation statements)

References 160 publications

(158 reference statements)

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“…Further research works, especially experiments, are required concerning these two interesting topics. Another interesting topic is to manipulate elastic waves in soft electroactive materials and structures by the material inhomogeneity and large deformation along with the electromechanical coupling, which should have wide applications in smart devices and intelligent soft robotics [66,67]. It should be pointed out that, according to Eq.…”

Section: Discussionmentioning

confidence: 99%

On propagation of axisymmetric waves in pressurized functionally graded elastomeric hollow cylinders

et al. 2018

Journal of Sound and Vibration

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Soft materials can be designed with a functionally graded (FG) property for specific applications.Such material inhomogeneity can also be found in many soft biological tissues whose functionality is only partly understood to date. In this paper, we analyze the axisymmetric guided wave propagation in a pressurized FG elastomeric hollow cylinder. The cylinder is subjected to a combined action of axial pre-stretch and pressure difference applied to the inner and outer

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Section: Discussionmentioning

confidence: 99%

On propagation of axisymmetric waves in pressurized functionally graded elastomeric hollow cylinders

et al. 2018

Journal of Sound and Vibration

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“…F σ , the constitutive relations (1) can be expressed in terms of the three principal stretches and the axial nominal electric displacement component as [46][47][48]    …”

Section: Nonlinear Deformation Of a Homogeneous De Cylindermentioning

confidence: 99%

Tuning Elastic Waves in Soft Phononic Crystal Cylinders Via Large Deformation and Electromechanical Coupling

Zhou

Bao

et al. 2018

Journal of Applied Mechanics

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Soft electroactive materials can undergo large deformation subjected to either mechanical or electrical stimulus, and hence, they can be excellent candidates for designing extremely flexible and adaptive structures and devices. This paper proposes a simple one-dimensional soft phononic crystal (PC) cylinder made of dielectric elastomer (DE) to show how large deformation and electric field can be used jointly to tune the longitudinal waves propagating in the PC. A series of soft electrodes, which are mechanically negligible, are placed periodically along the DE cylinder, and hence, the material can be regarded as uniform in the undeformed state. This is also the case for the uniformly prestretched state induced by a static axial force only. The effective periodicity of the structure is then achieved through two loading paths, i.e., by maintaining the longitudinal stretch and applying an electric voltage over any two neighboring electrodes or by holding the axial force and applying the voltage. All physical field variables for both configurations can be determined exactly based on the nonlinear theory of electroelasticity. An infinitesimal wave motion is further superimposed on the predeformed configurations, and the corresponding dispersion equations are derived analytically by invoking the linearized theory for incremental motions. Numerical examples are finally considered to show the tunability of wave propagation behavior in the soft PC cylinder. The outstanding performance regarding the band gap (BG) property of the proposed soft dielectric PC is clearly demonstrated by comparing with the conventional design adopting the hard piezoelectric material. One particular point that should be emphasized is that soft dielectric PCs are susceptible to various kinds of failure (buckling, electromechanical instability (EMI), electric breakdown (EB), etc.), imposing corresponding limits on the external stimuli. This has been carefully examined for the present soft PC cylinder such that the applied electric voltage is always assumed to be less than the critical voltage except for one case, in which we illustrate that the snap-through instability of the axially free PC cylinder made of a generalized Gent material may be used to efficiently trigger a sharp transition in the BGs.

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“…Very high electric potentials (in the range of kV) are often necessary to induce significant shape change, despite the dielectric typically being a thin film (<1 mm). For greater details, the reader is recommended these recent reviews (Wang and Qu, 2016;Zhu et al, 2016;Zhang and Serpe, 2017).…”

Section: Dielectric Elastomer Actuators (Deas)mentioning

confidence: 99%

Self-Healing and Damage Resilience for Soft Robotics: A Review

Bilodeau

Kramer

2017

Front. Robot. AI

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Advances in soft robotics will be crucial to the next generation of robot-human interfaces. Soft material systems embed safety at the material level, providing additional safeguards that will expedite their placement alongside humans and other biological systems. However, in order to function in unpredictable, uncontrolled environments alongside biological systems, soft robotic systems should be as robust in their ability to recover from damage as their biological counterparts. There exists a great deal of work on self-healing materials, particularly polymeric and elastomeric materials that can self-heal through a wide variety of tools and techniques. Fortunately, most emerging soft robotic systems are constructed from polymeric or elastomeric materials, so this work can be of immediate benefit to the soft robotics community. Though the field of soft robotics is still nascent as a whole, self-healing and damage resilient systems are beginning to be incorporated into three key support pillars that are enabling the future of soft robotics: actuators, structures, and sensors. This article reviews the state-of-the-art in damage resilience and self-healing materials and devices as applied to these three pillars. This review also discusses future applications for soft robots that incorporate self-healing capabilities.

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Constitutive models of artificial muscles: a review

Cited by 21 publications

References 160 publications

On propagation of axisymmetric waves in pressurized functionally graded elastomeric hollow cylinders

On propagation of axisymmetric waves in pressurized functionally graded elastomeric hollow cylinders

Tuning Elastic Waves in Soft Phononic Crystal Cylinders Via Large Deformation and Electromechanical Coupling

Self-Healing and Damage Resilience for Soft Robotics: A Review

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