Browsing by Author "Shian, Samuel"
Now showing items 1-15 of 15
-
Complex Ordered Patterns in Mechanical Instability Induced Geometrically Frustrated Triangular Cellular Structures
Kang, Sung Hoon; Shan, Sicong; Kosmrlj, Andrej; Noorduin, Wim L.; Shian, Samuel; Weaver, James C.; Clarke, David R.; Bertoldi, Katia (American Physical Society, 2014)Geometrical frustration arises when a local order cannot propagate throughout the space because of geometrical constraints. This phenomenon plays a major role in many systems leading to disordered ground-state configurations. ... -
Dielectric Elastomer Based “Grippers” for Soft Robotics
Shian, Samuel; Bertoldi, Katia; Clarke, David R. (Wiley-VCH Verlag, 2015) -
Dielectric elastomer generator with equi-biaxial mechanical loading for energy harvesting
Huang, Jiangshui; Shian, Samuel; Suo, Zhigang; Clarke, David R. (Society of Photo-Optical Instrumentation Engineers (SPIE), 2013)Dielectric elastomer generators (DEGs) are attractive candidates for harvesting electrical energy from mechanical work since they comprise relatively few moving parts and large elastomer sheets can be mass produced. ... -
Effect of High-Temperature Aging on the Thermal Conductivity of Nanocrystalline Tetragonal Yttria-stabilized Zirconia
Limarga, Andi M.; Shian, Samuel; Baram, Mor; Clarke, David R. (Elsevier, 2012)The thermal conductivity of yttria-stabilized zirconia (YSZ) thermal barrier coatings increases with high-temperature aging. This common observation has been attributed to the densification of the coatings as porosity ... -
Electrically tunable window device
Shian, Samuel; Clarke, David R. (The Optical Society, 2016)A device for controlling the transmittance of light over large areas, such as windows, is described. It is based on electrostatically induced surface deformation of soft dielectric elastomer sheets produced when a voltage ... -
Electrically-tunable surface deformation of a soft elastomer
Shian, Samuel; Clarke, David R. (Royal Society of Chemistry (RSC), 2016)The flat surface of a thin elastomer on a conducting substrate can be deformed by applying an electric field to a percolating network of metallic nanowires randomly dispersed over the surface. The magnitude of the field-induced ... -
First-principles calculations of the high-temperature phase transformation in yttrium tantalate
Feng, Jing; Shian, Samuel; Xiao, Bing; Clarke, David R. (American Physical Society (APS), 2014)The high-temperature phase transition between the tetragonal (scheelite) and monoclinic (fergusonite) forms of yttrium tantalite (YTaO4 ) has been studied using a combination of first-principles calculations and a Landau ... -
High-Speed, Compact, Adaptive Lenses Using In-Line Transparent Dielectric Elastomer Actuator Membranes
Shian, Samuel; Diebold, Roger Mitchell; Clarke, David R. (Society of Photo-Optical Instrumentation Engineers (SPIE), 2013)Electrically tunable adaptive lenses provide several advantages over traditional lens assemblies in terms of compactness, speed, efficiency, and flexibility. We present an elastomer-liquid lens system which makes use of ... -
Highly compliant transparent electrodes
Shian, Samuel; Diebold, Roger Mitchell; McNamara, Alena; Clarke, David R. (AIP Publishing, 2012)Adaptive optical devices based on electric field induced deformation of dielectricelastomers require transparent and highly compliant electrodes to conform to large shape changes. Electrical, optical, and actuation properties ... -
Maximizing the Energy Density of Dielectric Elastomer Generators Using Equi-Biaxial Loading
Huang, Jiangshui; Shian, Samuel; Suo, Zhigang; Clarke, David R. (Wiley-VCH Verlag Berlin, 2013-03-29)Dielectric elastomer generators (DEGs) for harvesting electrical energy from mechanical work have been demonstrated but the energy densities achieved are still small compared with theoretical predictions. We show that ... -
Optimizing the Electrical Energy Conversion Cycle of Dielectric Elastomer Generators
Shian, Samuel; Huang, Jiangshui; Zhu, Shijie; Clarke, David R. (Wiley-VCH Verlag Berlin, 2014) -
The tetragonal–monoclinic, ferroelastic transformation in yttrium tantalate and effect of zirconia alloying
Shian, Samuel; Sarin, Pankaj; Gurak, Mary; Baram, Mor; Kriven, Waltraud M.; Clarke, David R. (Elsevier BV, 2014)Oxide compositions of equimolar YO1.5 and TaO2.5 in the Y–Ta–Zr–O system have attractive properties for high-temperature applications, including as thermal barrier coatings. The effect of zirconia concentration, from 0 to ... -
Thermal conductivity of single- and multi-phase compositions in the ZrO2–Y2O3–Ta2O5 system
Limarga, Andi M.; Shian, Samuel; Leckie, Rafael; Levi, Carlos G.; Clarke, David R. (Elsevier BV, 2014)Compositions in the ZrO2-Y2O3-Ta2O5 system are of interest as low thermal conductivity, fracture resistant oxides for the next generation thermal barrier coatings (TBC). Multiple phases occur in the system offering the ... -
The Thickness and Stretch Dependence of the Electrical Breakdown Strength of an Acrylic Dielectric Elastomer
Huang, Jiangshui; Shian, Samuel; Diebold, Roger Mitchell; Suo, Zhigang; Clarke, David R. (American Institute of Physics, 2012)The performance of dielectric elastomer actuators is limited by electrical breakdown. Attempts to measure this are confounded by the voltage-induced thinning of the elastomer. A test configuration is introduced that avoids ... -
Tunable Lenses Using Transparent Dielectric Elastomer Actuators
Shian, Samuel; Diebold, Roger Mitchell; Clarke, David R. (Optical Society of America, 2013)Focus tunable, adaptive lenses provide several advantages over traditional lens assemblies in terms of compactness, cost, efficiency, and flexibility. To further improve the simplicity and compact nature of adaptive lenses, ...