Herbert Shea

Publications associées (163)

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Factors influencing the mean-time-to-failure of single-layer uniaxially prestretched silicone-based DEAs

Herbert Shea, Fabio Beco Albuquerque

We report an experimental investigation on the influence of electric field, electrode surface area, encapsulation layers and elastomer material on the mean-time-to-failure (MTTF) of single-layer uniaxially prestretched silicone-based dielectric elastomer a ...

SPIE-INT SOC OPTICAL ENGINEERING2022

Multistable shape programming of variable-stiffness electromagnetic devices

Herbert Shea, Bekir Aksoy

Programmable shape morphing enables soft machines to safely and effectively interact with the environment. Stimuli-responsive materials can transform 2D sheets into 3D geometries. However, most solutions cannot hold their shape at zero power, are limited t ...

AMER ASSOC ADVANCEMENT SCIENCE2022

Thin, flexible, and scalable mobile robot driven by electrostatic zipping actuators

Herbert Shea, Djen Timo Kühnel

Small-scale soft mobile robots are an attractive solution to gain access to hard-to-reach places. We demonstrate a thin (similar to 4 mm) and flexible mobile robot, 8 cm x 9 cm, mass 4 g, that uses 6 electrostatic zipping actuators with hydraulic coupling, ...

SPIE-INT SOC OPTICAL ENGINEERING2022

The Integration of Optical Stimulation in a Mechanically Dynamic Cell Culture Substrate

Herbert Shea, Matthias Imboden, Olexandr Gudozhnik

A cell culture well with integrated mechanical and optical stimulation is presented. This is achieved by combining dielectric elastomer soft actuators, also known as artificial muscles, and a varifocal micro-electromechanical mirror that couples light from ...

FRONTIERS MEDIA SA2022

Glove- and Sleeve-Format Variable-Friction Electrostatic Clutches for Kinesthetic Haptics

Herbert Shea, Ronan Julien Hinchet

Clothing with integrated high-force actuators enables wearable haptics for immersive virtual reality (VR) and enables soft exoskeletons for rehabilitation or human augmentation. Electrostatic clutches (ESClutches) offer a very-low-energy solution to block ...

WILEY2022

Shielded soft force sensors

Herbert Shea, Vito Cacucciolo, Bekir Aksoy, Krishna Manaswi Digumarti, Giulio Grasso, Yufei Hao

Capacitive soft force sensors require electrical shielding from electromagnetic interference, but this shielding can mess with the effectiveness of the sensing electrodes. Here, Aksoy et al. solve this problem by patterning the central sensing elastomer la ...

Nature Portfolio2022

Actuator, valve actuator unit and valve

Herbert Shea, Fabio Beco Albuquerque

An actuator (22) comprises at least one actuator body (32) of dielectric elastomeric material and two electrodes (34, 36) being attached to opposite surfaces of the actuator body (32), respectively. At least one of the actuator body (32) and at least one o ...

2022

Hydraulically amplified dielectric actuator taxels

Herbert Shea, Edouard Franck Vincent Gustave Leroy, Min Gao

A dielectric actuator including an enclosure forming a cavity having a dielectric fluid therein, the enclosure having a base, a flexible membrane and a reversibly-stretchable membrane, and a pair of electrodes, one electrode of the pair of electrodes arran ...

2021

Automated test setup to quantify the lifetime of dielectric elastomer actuators under a wide range of operating conditions

Herbert Shea, Fabio Beco Albuquerque, Djen Timo Kühnel, Valentin Colin Py

We present an automated test setup for the systematic performance and lifetime evaluation of dielectric elastomer actuators (DEAs). This setup, called the MAPLE setup, performs accelerated aging tests and allows quantifying how material choice, fabrication ...

IOP PUBLISHING LTD2021

Influence of electric field, temperature, humidity, elastomer material, and encapsulation on the lifetime of dielectric elastomer actuators (DEAs) under DC actuation

Herbert Shea, Fabio Beco Albuquerque

We present the effect of electric field, temperature, humidity, type of elastomer material, and encapsulation on the lifetime of silicone-based dielectric elastomer actuators (DEAs) under DC electric fields. DEAs are promising soft actuators, but little ha ...

IOP Publishing Ltd2021

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Automated test setup to quantify the lifetime of dielectric elastomer actuators under a wide range of operating conditions

Herbert Shea, Fabio Beco Albuquerque, Djen Timo Kühnel, Valentin Colin Py

IOP PUBLISHING LTD2021

Influence of electric field, temperature, humidity, elastomer material, and encapsulation on the lifetime of dielectric elastomer actuators (DEAs) under DC actuation

Herbert Shea, Fabio Beco Albuquerque

IOP Publishing Ltd2021