This report describes the development and testing of a Galloping Hydro Electric Energy Device (GHEED) which is intended to utilize a Dielectric Elastomer Generator (DEG). The mechanical side of the GHEED includes a shape morphing element, and has been designed to convert the kinetic energy of low head and/or turbulent flows into repeating, oscillating motion. The intent is to couple this motion...

the organo-metal salt of aluminum triacrylate (alta) with a general formula of (ch2=chcoo)3al was  synthesized  as  a  reactive  fller  for  elastomers through a two-step synthetic procedure. fourier transform-infrared spectroscopy (ftir), dsc and dta were employed for alta analysis and to study its cure characteristics. in this research, two composites based on ethylene propylene diene monomer...

PURPOSE In the authors' experience, the color of silicone elastomer following polymerization in molds made of gypsum products is slightly different from the color that was matched in the presence of the patient, before the silicone is packed. It is hypothesized that the investing materials and separating media have an effect on the color during the polymerization process of the silicone. MATE...

STATEMENT OF PROBLEM Conventionally, maxillofacial prostheses are fabricated by hand carving the missing anatomic defect in wax and creating a mold into which pigmented silicone elastomer is placed. Digital technologies such as computer numerical control (CNC) milling and 3-dimensional (3D) printing have been used to prepare molds directly or indirectly into which a biocompatible pigmented sili...

This study investigated the impact of using modified bitumen binders and additives to enhance physical characteristics asphalt mixtures at high, medium, low temperatures. Both basic rheological bituminous were tested by adding Styrene-Butadiene-Styrene, a type thermoplastic elastomer, as chemical additive various fractions (3.5%, 4%, 4.5%), two kinds Bitumen: Kraton styrene block copolymers Eur...

Electromechanical materials are very useful as actuators when small weight, and low to moderate force are needed to manipulate small objects. The Liquid Crystal Material Research center located in Boulder, Colorado in interested in developing a novel liquid crystal based electromechanical elastomer. De Vries liquid crystals organize into layers where the director is perpendicular to the layer n...

Much of the existing literature on dielectric elastomers has focused on quasi-static deformation. However, in some potential applications, the elastomer deforms at high frequencies and undergoes nonlinear oscillation. While nonlinear oscillation has been studied in many areas of science and engineering, we are unaware of any theoretical analysis of nonlinear oscillation of dielectric elastomers...