Electromechanical Stream-Structure Instabilities

Infraspinatus Electromechanical Delay on Shoulder Instabilities

Shoulder instability is a major complaint in overhead athletes. The shoulder joint stability is provided mainly by rotator cuff muscles. The Electromechanical Delay (EMD) may be an important parameter in the responsiveness of a muscle. The aim of this study was to measure and compare the infraspinatus EMD in healthy and unstable shoulders and in dominant and non-dominant shoulders. We did not f...

Electromechanical instabilities of thermoplastics: Theory and in situ observation.

Thermoplastics under voltages are used in diverse applications ranging from insulating cables to organic capacitors. Electromechanical instabilities have been proposed as a mechanism that causes electrical breakdown of thermoplastics. However, existing experiments cannot provide direct observations of the instability process, and existing theories for the instabilities generally assume thermopl...

Viscoelastic effects on electromechanical instabilities in dielectric elastomers

We present a computational study of the effects of viscoelasticity on the electromechanical behavior of dielectric elastomers. A dynamic, finite deformation finite element formulation for dielectric elastomers is developed that incorporates the effects of viscoelasticity using the nonlinear viscoelasticity theory previously proposed by Reese and Govindjee. The finite element model features a th...

Biological order, structure and instabilities.

Low-voltage shock-mitigated micro-electromechanical systems structure