Results 81 to 90 of about 38,943 (291)

4D‐Printed Spin Crossover Metamaterials with Giant Programmable Positive or Negative Thermal Expansion

Advanced Materials, EarlyView.
Spin crossover composite filaments are implemented for the rational design of 4D‐printed mechanical metamaterials. The obtained bi‐material structures guided by a theoretical analysis based on analytical calculations and Finite Element Analysis simulations exhibit giant programmable positive or negative deformation with coefficients of thermal ...
Adelais Trapali, Yuteng Zhang, Seyed Ehsan Alavi, Nagham Mawassy, Raja Zulkarnain, Gábor Molnár, Lionel Salmon, Azzedine Bousseksou   +7 more
wiley   +1 more source

Effect of Interlaminar Weak Bonding and Constant Magnetic Field on the Hygrothermal Stresses of a FG Hybrid Cylindrical Shell Using DQM [PDF]

Journal of Stress Analysis, 2018
In the present article, the influences of interlaminar bonding imperfection and constant magnetic field, as well as hygrothermal environmental conditions, on the stresses and displacements of a cylindrical shell with surface bounded sensor and actuator ...
M. Saadatfar
doaj   +1 more source

Pathway to the PiezoElectronic Transduction Logic Device

, 2015
The information age challenges computer technology to process an exponentially increasing computational load on a limited energy budget - a requirement that demands an exponential reduction in energy per operation.
Armstrong, C., Bryce, B. A., Copel, M., Elmegreen, B. G., Gordon, M. S., Haensch, W., Hung, L. -W., Keech, R., Kuroda, M. A., Liu, X. -H., Martyna, G. J, Miyazoe, H., Newns, D. M., Reuter, K. B., Rossnagel, S. M., Schrott, A. G., Shaw, T. M., Shett, S., Solomon, P. M., Theis, T. N., Trolier-McKinstry, S.   +20 more
core   +2 more sources

Conductive Hydrogels for Exogenous Sensing and Cell Fate Control

Advanced Materials, EarlyView.
We engineer electrically conductive hydrogels by combining sulfated glycosaminoglycans with semiconducting polymers. These hydrogels bind bioactive proteins, including growth factors, whose release or retention can be modulated by low‐voltage stimulation. The hydrogels are also integrated as 3D channels in organic electrochemical transistors as part of
Teuku Fawzul Akbar, Carlos Alejandro Jimenez‐Rodriguez, Railia Biktimirova, Ilka Hermes, Thomas Kurth, My Duyen Pham, Mikhail Tsurkan, Jens Friedrichs, Francis L. C. Morgan, Hans Kleemann, Olga Guskova, Uwe Freudenberg, Peter Fratzl, Carsten Werner, Christoph Tondera, Ivan R. Minev   +15 more
wiley   +1 more source

Design of a New Type of SEA Structure and Optimization of Elastic Elements

Jixie chuandong, 2023
In order to meet the motion requirements of the elbow joint of the rehabilitation robot, a double-node symmetrical spiral corrugated elastic element is applied to the series elastic actuator (SEA), and the energy storage ratio is used as the optimization
Li Yuqing, Liu Ning
doaj  

Re-Engineering a High Performance Electrical Series Elastic Actuator for Low-Cost Industrial Applications

Actuators, 2017
Cost is an important consideration when transferring a technology from research to industrial and educational use. In this paper, we introduce the design of an industrial grade series elastic actuator (SEA) performed via re-engineering a research grade ...
Kenan Isik, Shunde He, Joseph Ho, Luis Sentis   +3 more
doaj   +1 more source

Robotic Biceps Exercise Machine: Hardware Using Series Elastic Actuator and Control With Disturbance Observer

IEEE Access, 2020
Resistance training is a popular form of exercise owing to its health-related and athletic performance benefits. Robotic exercise machines using human-robot interaction are a promising solution for designing resistance training programs that successfully
Kyungnam Kim, Daehie Hong
doaj   +1 more source

Bonding of Acrylic Pressure‐Sensitive Adhesives and Silicone Elastomers via Surfactant‐Assisted Plasma Activation for Soft Robotics

Advanced Materials Interfaces, EarlyView.
A simple strategy is presented for bonding acrylic PSAs and silicone elastomers by curing surfactant‐doped Ecoflex on oxygen‐plasma‐treated VHB. The interface reaches a maximum strength of 1.6 N/mm (over 20 times that of the control) while retaining material compliance.
Kengo Kusama, Tadatoshi Kurogi, Kohei Takada, Mai Sasaoka, Yui Kumon, Masaru Misumi, Kanako Funami, Jun Shintake   +7 more
wiley   +1 more source

Mechanical design and force control algorithm for a robot leg with hydraulic series-elastic actuators

International Journal of Advanced Robotic Systems, 2020
This article presents a mechanical design structure for hydraulic actuators using the principle of series-elastic actuator, considering the restriction of mechanical structure, weight and size, as well as the requirement of high joint torques due to the ...
Yapeng Shi, Pengfei Wang, Fusheng Zha, Lining Sun, Mantian Li, Wangqiang Jia, Zhibin Li   +6 more
doaj   +1 more source

From Series Elastic Actuation to Series-Parallel Elastic Actuation

, 2014
Actuators are key components for moving and con- trolling a mechanism or system. However, the torque to weight ratio and the energy efficiency of the current state of the art actuators is much lower than in human muscles. As a consequence, among others, manipula- tors for human robot interaction in industry or service applications have a low payload to
Mathijssen, Glenn, Furnemont, Raphaël, Van Ham, Ronald, Lefeber, Dirk, Vanderborght, Bram   +4 more
openaire   +1 more source