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A modular design kit for task-adaptable low-cost robots based on BaPaMan design

G. BORCHERT, C. L?CHTE, G. CARBONE, A. RAATZ

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 1,   Pages 33-41 doi: 10.1007/s11465-013-0356-5

Abstract: degree of freedom (DOF) spatial parallel robot which comprises flexure hinges and Shape Memory Alloy (SMA) actuators to achieve a low-cost design, well suited for easy operation applications.

Keywords： binary actuation     flexure hinges     SMA actuators     low-cost     design kit     task-adaptation    

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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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Topology optimization and seismic collapse assessment of shape memory alloy (SMA)-braced frames: Effectiveness

Aydin HASSANZADEH; Saber MORADI

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 3,   Pages 281-301 doi: 10.1007/s11709-022-0807-3

Abstract: paper presents a seismic topology optimization study of steel braced frames with shape memory alloy (SMAOptimal SMA-braced frames (SMA-BFs) with either Fe-based SMA or NiTi braces are determined in a performance-basedand cross-sectional area of SMA bracing members.In addition to a lower unit price compared to NiTi, Fe-based SMAs reduce SMA material usage.In frames with Fe-based SMA braces, the SMA usage is reduced by up to 80%.

Keywords： topology optimization     shape memory alloy     Fe-based SMA     steel braced frames     performance-based seismic    

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Experimental flexural behavior of SMA-FRP reinforced concrete beam

Adeel ZAFAR, Bassem ANDRAWES

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 4,   Pages 341-355 doi: 10.1007/s11709-013-0221-y

Abstract: This research presents a new type of shape memory alloy (SMA)-based composite reinforcement with abilityIn this study, small diameter SMA wires are embedded in thermoset resin matrix with or without additionalThe proposed SMA-FRP composite square rebars are first fabricated and then embedded in small scale concreteIt is found that the SMA-FRP composite reinforcement is able to enhance the performance of concrete member

Keywords： re-centering     shape memory alloys     concrete     composite     fiber reinforced polymer     scanning electron microscopy    

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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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Grafting of PEG400 onto the surface of LLDPE/SMA film

CHEN Gufeng, ZHANG Yi, XU Jiarui, ZHU Yafei

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 2,   Pages 128-131 doi: 10.1007/s11705-007-0024-6

Abstract: Linear low-density polyethylene (LLDPE) was melt and blended with styrene-maleic anhydride copolymer (SMAResults show that PEG400 can be grafted onto the surface of the films via esterification with SMA.The immersion of PEG promotes the enrichment of SMA onto the surface of the films.These experiments show that surface functionalization of polyethylene films by blending SMA and then

Keywords： hydrophilicity     temperature     effective     immersion     reflection accessory    

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Parametric study on damage control design of SMA dampers in frame-typed steel piers

Xiaoqun LUO, Hanbin GE, Tsutomu USAMI,

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 4,   Pages 384-394 doi: 10.1007/s11709-009-0065-7

Abstract: This paper focuses on damage control design of SMA dampers in steel frame piers.parametric study based on time history analyses is carried out on frame-typed bridge piers with axial-type SMA

Keywords： damage control design     shape memory alloy     parameter study     displacement-based verification     strain-based verification     time history analysis    

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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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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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The development on seismic design and evaluation of CGNPC after Fukushima accident

Mao Qing,Wu Yingxi,Zhang Jian,Meng Ajun,Zhang Tao,Yang Chunju,Liu Fang

Strategic Study of CAE 2013, Volume 15, Issue 4,   Pages 46-51

Abstract:

This paper introduced the seismic design requirements of nuclear power plant, the seismic design situation of the unit in construction or in service, and the serious consequence impacted by earthquake. Then, it described in brief the measures on seismic analysis taken by countries who own nuclear power plants in the world after the Fukushima nuclear accident, and gave a particular introduction about the improvement taken by China Guangdong Nuclear Power Holding Co. Ltd. Finally, this paper presented some steps for the new nuclear power plants at the seismic design and evaluation to enhance the seismic capacity of nuclear power plants through technical means.

Keywords： seismic design basis     beyond design basis earthquake     seismic margin assessment（SMA）     seismic isolation    

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Seismic responses and resilience of novel SMA-based self-centring eccentrically braced frames under near-fault

Zhi-Peng CHEN; Songye ZHU

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 8,   Pages 962-975 doi: 10.1007/s11709-022-0873-6

Abstract: this paper, the seismic responses and resilience of a novel K-type superelastic shape memory alloy (SMAThe simulation models of the SMA-based SC-EBF and a corresponding equal-stiffness traditional EBF counterpartThe novel SMA-based SC-EBF shows a much better resilience in the study and represents a promising attractive

Keywords： shape memory alloy     eccentrically braced frame     self-centring     fragility     loss function     resilience    

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Computational studies on the seismic response of the State Route 99 bridge in Seattle with SMA/ECC plastic

Jiping GE, M. Saiid SAIIDI, Sebastian VARELA

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 1,   Pages 149-164 doi: 10.1007/s11709-018-0482-6

Abstract: It will be the first full-scale highway bridge to use superelastic shape memory alloy bars (SMA) andreinforced concrete columns, and the other with top plastic hinges incorporating Nickel-Titanium (NiTi) SMAThe novel SMA/ECC plastic hinges were found to substantially reduce damage and post-earthquake residual

Keywords： seismic design     analytical simulation     near-fault earthquakes     shape memory alloy     engineered cementitious composite     self-centering    

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Topology optimization of piezoelectric bi-material actuators with velocity feedback control

Mariana MORETTI, Emílio C. N. SILVA

Frontiers of Mechanical Engineering 2019, Volume 14, Issue 2,   Pages 190-200 doi: 10.1007/s11465-019-0537-y

Abstract: In recent years, the new technologies and discoveries on manufacturing materials have encouraged researchers to investigate the appearance of material properties that are not naturally available. Materials featuring a specific stiffness, or structures that combine non-structural and structural functions are applied in the aerospace, electronics and medical industry fields. Particularly, structures designed for dynamic actuation with reduced vibration response are the focus of this work. The bi-material and multifunctional concepts are considered for the design of a controlled piezoelectric actuator with vibration suppression by means of the topology optimization method (TOM). The bi-material piezoelectric actuator (BPEA) has its metallic host layer designed by the TOM, which defines the structural function, and the electric function is given by two piezo-ceramic layers that act as a sensor and an actuator coupled with a constant gain active velocity feedback control (AVFC). The AVFC, provided by the piezoelectric layers, affects the structural damping of the system through the velocity state variables readings in time domain. The dynamic equation analyzed throughout the optimization procedure is fully elaborated and implemented. The dynamic response for the rectangular four-noded FE analysis is obtained by the Newmark’s time-integration method, which is applied to the physical and the adjoint systems, given that the adjoint formulation is needed for the sensitivity analysis. A gradient-based optimization method is applied to minimize the displacement energy output measured at a predefined degree-of-freedom of the BPEA when a transient mechanical load is applied. Results are obtained for different control gain values to evaluate their influence on the final topology.

Keywords： topology optimization method     bi-material piezoactuator     active velocity feedback control     time-domain transient analysis     host structure design     vibration suppression    

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Dynamical Experiment Research on New Seismic Isolation Bearings with SMA Wires

Deng Zongcai,Sun Hongjun,Liu Chunguo,Niu Kun,Deng Hongliang

Strategic Study of CAE 2005, Volume 7, Issue 12,   Pages 61-68

Abstract:

As the aim of improving the utilization ratio of SMAs in SMA-rubber seismic isolation bearings, severaldifferent SMA-rubber seismic isolation bearings were designed, and energy dissipation experiments wereThe factors which affect the level stiffness, energy dissipation and equivalent damping ratio of SMA-rubberResult showed that the new SMA-rubber seismic isolation bearings have better hysteresis and energy dissipationIt provided the base to optimize the SMA-rubber seismic isolation bearings.

Keywords： shape memory alloy     seismic isolation bearings     initial stiffness     hysteresis energy dissipation     equivalent damping ratio    

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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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Title Author Date Type Operation

A modular design kit for task-adaptable low-cost robots based on BaPaMan design

G. BORCHERT, C. L?CHTE, G. CARBONE, A. RAATZ

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

Topology optimization and seismic collapse assessment of shape memory alloy (SMA)-braced frames: Effectiveness

Aydin HASSANZADEH; Saber MORADI

Journal Article

Experimental flexural behavior of SMA-FRP reinforced concrete beam

Adeel ZAFAR, Bassem ANDRAWES

Journal Article

Robust isogeometric topology optimization for piezoelectric actuators with uniform manufacturability

Journal Article

Grafting of PEG400 onto the surface of LLDPE/SMA film

CHEN Gufeng, ZHANG Yi, XU Jiarui, ZHU Yafei

Journal Article

Parametric study on damage control design of SMA dampers in frame-typed steel piers

Xiaoqun LUO, Hanbin GE, Tsutomu USAMI,

Journal Article

Polymer nanocomposites for microactuation and magneto-electric transduction

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

Journal Article

Semi-active vibration control using piezoelectric actuators in smart structures

Jinhao QIU, Hongli JI, Kongjun ZHU

Journal Article

The development on seismic design and evaluation of CGNPC after Fukushima accident

Mao Qing,Wu Yingxi,Zhang Jian,Meng Ajun,Zhang Tao,Yang Chunju,Liu Fang

Journal Article

Seismic responses and resilience of novel SMA-based self-centring eccentrically braced frames under near-fault

Zhi-Peng CHEN; Songye ZHU

Journal Article

Computational studies on the seismic response of the State Route 99 bridge in Seattle with SMA/ECC plastic

Jiping GE, M. Saiid SAIIDI, Sebastian VARELA

Journal Article

Topology optimization of piezoelectric bi-material actuators with velocity feedback control

Mariana MORETTI, Emílio C. N. SILVA

Journal Article

Dynamical Experiment Research on New Seismic Isolation Bearings with SMA Wires

Deng Zongcai,Sun Hongjun,Liu Chunguo,Niu Kun,Deng Hongliang

Journal Article

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

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

Journal Article