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Preparation and performance of soft actuator based on IPMC with silver electrodes

Qi CHEN, Ke XIONG, Kan BIAN, Ning JIN, Bangfeng WANG,

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 4,   Pages 436-440 doi: 10.1007/s11465-009-0054-5

Abstract: The surface electrodes of traditional ionic polymer-metal composites (IPMC) are made of platinum. To reduce the production cost, nonprecious metals such as silver is proposed. A new approach of electroless silver plating based on chemical deposition method is adopted, getting two types of IPMCs, Pt-Ag IPMC, and Ag-Ag IPMC. The microscopic analysis, driving abilities tests, and their surface-electrode resistance analysis show that Ag and Pt particles penetrate inside Nafion membrane with gradient distribution throughout the membrane. The maximum electro-active bending deformation angles of the specimens, which are obtained under the same specimen dimension and constrains, are about 60° for Pt-Pt IPMC and Pt-Ag IPMC and 90° for the Ag-Ag IPMC, respectively, corresponding to the driving voltage of 3 V, 4 V, and 1.5 V. The surface-electrode resistance of Ag-Ag IPMC is the lowest and the most stable, which shows that the proposed approach is valid. The experiments show that the IPMC technology based on the silver electrode is feasible.

Keywords： ionic polymer-metal composites (IPMC)     Nafion     intelligent material     soft actuators     electroless silver plating    

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A rate-dependent Prandtl-Ishlinskii model for piezoelectric actuators using the dynamic envelope function

Meiju YANG,Chunxia LI,Guoying GU,Limin ZHU

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 1,   Pages 37-42 doi: 10.1007/s11465-015-0326-1

Abstract: (P-I) model is proposed to characterize the rate-dependent hysteresis nonlinearity of piezoelectric actuators

Keywords： piezoelectric actuators     hysteresis     Prandtl-Ishlinskii     rate-dependent    

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Ionic Elastomers for Electric Actuators and Sensors Review

Chenrun Feng, C.P. Hemantha Rajapaksha, Antal Jákli

Engineering 2021, Volume 7, Issue 5,   Pages 581-602 doi: 10.1016/j.eng.2021.02.014

Abstract: elastomers have drawn worldwide attention for their advanced functions in batteries, electroactive softStretchable ionic elastomers with dispersed soft ionic moieties such as ionic liquids have gained remarkableattention as soft sensors, in applications such as the wearable devices that are often called electricIn this review, we summarize the materials and performance properties of engineered ionic elastomer actuatorsFirst, we review three classes of ionic elastomer actuators—namely, ionic polymer metal composites

Keywords： Soft robots     Ionic electroactive elastomer     Ionic elastomer sensor     Programmable deformation     Liquid    

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Robust isogeometric topology optimization for piezoelectric actuators with uniform manufacturability

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 2, doi: 10.1007/s11465-022-0683-5

Abstract: Piezoelectric actuators have received substantial attention among the industry and academia due to quickHowever, the design of piezoelectric actuators always suffers from the emergence of several localizedto propose a robust isogeometric topology optimization (RITO) method for the design of piezoelectric actuators

Keywords： piezoelectric actuator     isogeometric topology optimization     uniform manufacturability     robust formulation     density distribution function    

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Development of soft kernel durum wheat

Craig F. MORRIS

Frontiers of Agricultural Science and Engineering 2019, Volume 6, Issue 3,   Pages 273-278 doi: 10.15302/J-FASE-2019259

Abstract: There are three kernel texture classes in wheat: soft and hard hexaploid ( ), and very hard durum ( subspTypical SKCS values for soft wheat would be around 25 and for durum wheat≥80.Soft kernel durum wheat was created via homeologous recombination using the mutation, which facilitateddurum grain resulted in kernel texture and flour milling characteristics nearly identical to that of softAgronomically, soft durum germplasm showed good potential with moderate grain yield and resistance to

Keywords： soft durum wheat     grain hardness     puroindolines     milling     baking     pasta     noodles    

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Polymer nanocomposites for microactuation and magneto-electric transduction

Kaori YUSE, Benoit GUIFFARD, Rabah BELOUADAH, Lionel PETIT, Laurence SEVEYRAT, Daniel GUYOMAR

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 3,   Pages 350-354 doi: 10.1007/s11465-009-0056-3

Abstract: In the last decade, electroactive polymers have attracted much attention especially because of their very actuating capabilities. Large strain is experimentally observed, but under quite high electrical field, which can be a severe drawback for actuating applications. First part of the present paper is concerned with the reduction of applied field onto electroactive polymer films to get a given strain level. Polyurethane (PU) films filled with carbon black (CB) nanoparticles exhibit relatively high strain level under a field of only 12.5 kV/mm. The simple easy-to-make method solution cast method was applied. Even though the generated stress level is still quite low, the present work shows high strain level under quite low field appliance by easy manufacturing, lightweight, and flexible polymer film. Besides, another interest of the present paper is in magneto-elasto-electric effect of a polymer film filled with some magnetic nano particles. Films filled with nonpiezoelectric but with magnetite particles has still short history. With the use of magneto materials, a large magnetic DC bias field is generally required, and it causes big problem on application. The films filled with some magnetite nanoparticles (Fe3O4 and Nickel) are fabricated then examined. It is clearly demonstrated that our films do not require any DC bias. Although linear polarization value is relatively small, the first step of the studies on magnetite nano-filled film is presented.

Keywords： electroactive polymers     carbon filling     actuator     nanocarbon     electromechanical coupling     dielectric polymer actuators     polymer actuators     microactuation     magneto-electric effect    

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Flagellar/Ciliary Intrinsic Driven Mechanism Inspired All-in-One Tubular Robotic Actuator Article

Jiaqi Miao, Tieshan Zhang, Gen Li, Dong Guo, Siqi Sun, Rong Tan, Jiahai Shi, Yajing Shen

Engineering 2023, Volume 23, Issue 4,   Pages 170-180 doi: 10.1016/j.eng.2022.09.014

Abstract:

The unique motion styles of flagella and cilia (i.e., planar/helical waveform propulsion of flagella and twodimensional (2D)/three-dimensional (3D) asymmetric ciliary beating), play a key role in many biological activities and inspire lots of bionic designs, especially miniature robotic systems. However, quite different to the fact in nature that microorganisms can evolve diverse motions from the homologous bio-structure (9 + 2 axoneme structure), current bionics can still not find an effective engineering solution to achieve such wisdom. Herein, by investigating the inner structure of flagella/cilia and their intrinsic driven mechanisms, we derive a unified physical model to describe the microtubules’ bending and the constructed external motions. Then, we propose a three-channel based tubular actuation concept and correspondingly fabricate an actuator via a rod-embedded casting process. By sequencing the actuation of each channel, our design can not only reproduce the diverse 2D/3D flagellar/ciliary motility in nature, but also extrapolate a variety of symmetry-breaking ciliary beating modes for effective propulsion at low Reynolds number. This study deepens our understanding of the propulsion mechanism of microorganisms and provides new inspirations for the design of biomimetic systems, which may find significant applications in a wide spectrum of engineering fields.

Keywords： Biomimetic systems     Soft actuators     9 + 2 structure     Artificial cilia     Low Reynolds number    

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Semi-active vibration control using piezoelectric actuators in smart structures

Jinhao QIU, Hongli JI, Kongjun ZHU

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 3,   Pages 242-251 doi: 10.1007/s11465-009-0068-z

Abstract: widely used functional materials in smart structures, have many outstanding advantages for sensors and actuators

Keywords： smart structure     semi-active method     vibration control     piezoelectric actuator    

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Performance of soft-hard-soft (SHS) cement based composite subjected to blast loading with consideration

Jun WU,Xuemei LIU

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 3,   Pages 323-340 doi: 10.1007/s11709-015-0301-2

Abstract: This paper presents a combined experimental and numerical study on the damage and performance of a soft-hard-soft

Keywords： high strength concrete (SHS)     engineered cementitious composite     interface     blast test     strain rate effect    

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Design and modeling of a novel soft parallel robot driven by endoskeleton pneumatic artificial muscles

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 2, doi: 10.1007/s11465-022-0678-2

Abstract: their inherent great flexibility, good compliance, excellent adaptability, and safe interactivity, softrobots an important position in the field of soft robots.In this paper, a soft robot with 10 soft modules, comprising three uniformly distributed endoskeletonA novel kinematic modeling method for variable-curvature soft robots based on the minimum energy methodThe prototype and modeling method can provide a new perspective for soft robot design, modeling, and

Keywords： pneumatic artificial muscles     soft robot     modeling approach     principle of virtual work     external load    

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Analysis of load and adaptability of disc cutters during shield tunneling in soft–hard varied strata

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 4,   Pages 533-545 doi: 10.1007/s11709-023-0946-1

Abstract: The disc cutters of shield machines exhibit unsatisfactory adaptability and performance during the soft–hardthe rotation state, cutting performance, and adaptability of disc cutters during shield tunneling in soft–hardThe tangential loads of the disc cutters during the cutting of four typical soft-strata excavation faceA greater penetration is suggested for soft-strata tunneling to allow the disc cutters to rotate smoothly

Keywords： shield tunneling     disc cutter load     laboratory excavation test     numerical calculation     soft–hard varied    

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Risk stratification system for skin and soft tissue infections after allogeneic hematopoietic stem cell

Frontiers of Medicine 2022, Volume 16, Issue 6,   Pages 957-968 doi: 10.1007/s11684-021-0910-1

Abstract: Skin and soft tissue infections (SSTIs) refer to infections involving the skin, subcutaneous tissue,

Keywords： skin and soft tissue infections     hematopoietic stem cell transplantation     risk stratification system    

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Design and experiment of a novel pneumatic soft arm based on a deployable origami exoskeleton

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 4, doi: 10.1007/s11465-023-0770-2

Abstract: Soft arms have shown great application potential because of their flexibility and compliance in unstructuredHowever, soft arms made from soft materials exhibit limited cargo-loading capacity, which restricts theirIn this research, a novel soft arm was developed by coupling a rigid origami exoskeleton with soft airbagsThe joint module of the soft arm was composed of a deployable origami exoskeleton and three soft airbagsThe motion and load performance of the soft arm of the eight-joint module was tested.

Keywords： pneumatic soft arm     soft airbag     deployable origami exoskeleton     bistable characteristics     cargo-loading    

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Crack evolution of soft–hard composite layered rock-like specimens with two fissures under uniaxial compression

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 6,   Pages 1372-1389 doi: 10.1007/s11709-021-0772-2

Abstract: image correlation were used to study the spatiotemporal evolution characteristics of crack extension of softHard layers predominantly produce tensile cracks; soft layers produce shear cracks.

Keywords： soft−hard composite layered rock mass     double cracks     crack evolution     acoustic emission     digital image    

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Seismic responses of subway station with different distributions of soft soil in Tianjin

Dejian YANG,Meiling DUAN

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 2,   Pages 187-193 doi: 10.1007/s11709-014-0252-z

Abstract: boundary by using ANSYS and analyzed seismic responses of subway station with different distribution of softThe nonlinear dynamic properties of soft soils are modeled by the KINH.and internal force on subway station in the general field soil and five different distributions of softProvide reference for improving the seismic performance of subway stations in Tianjin soft soil.

Keywords： distribution of soft soil     soft soil in Tianjin     seismic response     ANSYS    

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Title Author Date Type Operation

Preparation and performance of soft actuator based on IPMC with silver electrodes

Qi CHEN, Ke XIONG, Kan BIAN, Ning JIN, Bangfeng WANG,

Journal Article

A rate-dependent Prandtl-Ishlinskii model for piezoelectric actuators using the dynamic envelope function

Meiju YANG,Chunxia LI,Guoying GU,Limin ZHU

Journal Article

Ionic Elastomers for Electric Actuators and Sensors

Chenrun Feng, C.P. Hemantha Rajapaksha, Antal Jákli

Journal Article

Robust isogeometric topology optimization for piezoelectric actuators with uniform manufacturability

Journal Article

Development of soft kernel durum wheat

Craig F. MORRIS

Journal Article

Polymer nanocomposites for microactuation and magneto-electric transduction

Kaori YUSE, Benoit GUIFFARD, Rabah BELOUADAH, Lionel PETIT, Laurence SEVEYRAT, Daniel GUYOMAR

Journal Article

Flagellar/Ciliary Intrinsic Driven Mechanism Inspired All-in-One Tubular Robotic Actuator

Jiaqi Miao, Tieshan Zhang, Gen Li, Dong Guo, Siqi Sun, Rong Tan, Jiahai Shi, Yajing Shen

Journal Article

Semi-active vibration control using piezoelectric actuators in smart structures

Jinhao QIU, Hongli JI, Kongjun ZHU

Journal Article

Performance of soft-hard-soft (SHS) cement based composite subjected to blast loading with consideration

Jun WU,Xuemei LIU

Journal Article

Design and modeling of a novel soft parallel robot driven by endoskeleton pneumatic artificial muscles

Journal Article

Analysis of load and adaptability of disc cutters during shield tunneling in soft–hard varied strata

Journal Article

Risk stratification system for skin and soft tissue infections after allogeneic hematopoietic stem cell

Journal Article

Design and experiment of a novel pneumatic soft arm based on a deployable origami exoskeleton

Journal Article

Crack evolution of soft–hard composite layered rock-like specimens with two fissures under uniaxial compression

Journal Article

Seismic responses of subway station with different distributions of soft soil in Tianjin

Dejian YANG,Meiling DUAN

Journal Article