Search Results - "Zehnder, A.T"

Reducing Anchor Loss in MEMS Resonators Using Mesa Isolation by Pandey, M., Reichenbach, R.B., Zehnder, A.T., Lal, A., Craighead, H.G.

“…In microelectromechanical systems resonators, dissipation of energy through anchor points into the substrate adds to resonator energy loss, contributing to low…”
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Modeling of Coupled Dome-Shaped Microoscillators by Sahai, T., Zehnder, A.T.

“…Synchronized micromechanical oscillators have potential for applications in signal processing, neural computing, sensing, and other fields. This paper explores…”
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A micromechanical flow sensor for microfluidic applications by Czaplewski, D.A., Ilic, B.R., Zalalutdinov, M., Olbricht, W.L., Zehnder, A.T., Craighead, H.G., Michalske, T.A.

“…We fabricated a microfluidic flow meter and measured its response to fluid flow in a microfluidic channel. The flow meter consisted of a micromechanical plate,…”
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Analysis of Frequency Locking in Optically Driven MEMS Resonators by Pandey, M., Aubin, K., Zalalutdinov, M., Reichenbach, R.B., Zehnder, A.T., Rand, R.H., Craighead, H.G.

“…Thin, planar, radio frequency microelectromechanical systems (MEMS) resonators have been shown to self-oscillate in the absence of external forcing when…”
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Pressure, hydrolytic degradation and plasticization drive high temperature blistering failure in moisture saturated polyimides by Xu, Y., Zehnder, A.T.

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A simple model relating crack growth resistance to fracture process parameters in elastic-plastic solids by Zehnder, A.T., Hui, C.Y.

“…A simple model of the energy dissipation due to crack growth in a ductile material was developed. In this model, the crack tip cohesive zone and the material…”
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Effect of Hydration on Tensile Response of a Dual Cross-linked PVA Hydrogel by Meacham, R., Liu, M., Guo, J., Zehnder, A.T., Hui, C.-Y.

“…Background Little is known about the effect of water content on the mechanical properties of dual cross-linked hydrogels. Objective To quantify the changes in…”
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Inverse thermographic characterization of optically unresolvable through cracks in thin metal plates by Jeong, W.Y., Earls, C.J., Philpot, W.D., Zehnder, A.T.

“…The present research explores the feasibility of a novel non-contact means for the detection and characterization of small scale, open crack-like defects…”
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Thermomechanics of slow stable crack growth: closing the loop between experiments and computational modeling by Bhalla, K.S., Zehnder, A.T., Han, X.

“…Most of the plastic work done ahead of a running crack is dissipated as heat. Even for slow moving cracks the resulting temperature field is of interest since…”
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Dynamic full field measurements of crack tip temperatures by Guduru, P.R, Zehnder, A.T, Rosakis, A.J, Ravichandran, G

“…This paper presents a detailed investigation of the evolution of temperature field at the tip of a stationary crack subjected to dynamic loading in two…”
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High temperature shear strength of T650-35/HFPE-II-52 polyimide matrix unidirectional composite by BHARGAVA, P, ZEHNDER, A. T

“…The shear strength of a 4-ply unidirectional composite laminate consisting of carbon fibers (T650-35) and a polyimide matrix (HFPE-II-52) was measured over a…”
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Reinforcing effect of coverlayers on the fatigue life of copper-Kapton flex cables by Zehnder, A.T., Ingraffea, A.R.

“…Flex cables constructed of copper sandwiched between Kapton (polyimide) fail under repeated bending due to the formation and propagation of fatigue cracks in…”
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Cohesive properties of nickel-alumina interfaces determined via simulation of ductile bridging experiments by Kolhe, R, Tang, S, Hui, C.-Y, Zehnder, A.t

“…A combined experimental and computational study is carried out to characterize a nickel-alumina interface in terms of the two parameter (σ̂, Γ0) computational…”
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Chevron-Notched Toughness of Materials with Rising Fracture Resistance Curves by Zehnder, Alan T., Hui, Chung-Yuen, Rodeghiero, Eric D.

“…The effect of rising resistance curves on the fracture tougness determined from chevron‐notched beam tests is estimated via a set of simple numerical…”
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A method for thermo-mechanical analysis of steady state dynamic crack growth by Kallivayalil, J.A., Hui, C.Y., Zehnder, A.T.

“…Cracks propagating at high speeds in metals generate heat at their tips which cannot be conducted away in the very short time span of crack growth. The effect…”
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On the dynamic fracture of structural metals by ROSAKIS, A.J, ZEHNDER, A.T

“…Some fundamental aspects of dynamic crack growth in structural steels are presented and discussed. The discussion takes the form of a direct comparison of…”
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Anchor Loss Reduction in Resonant MEMS using MESA Structures by Pandey, M., Reichenbach, R.B., Zehnder, A.T., Lal, A., Craighead, H.G.

“…The quality factor of an oscillator is inversely proportional to the damping and is a measure of the width of its amplitude vs. forcing frequency response. For…”
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A note on the measurement of K and J under small scale yielding conditions using the method of caustics by ZEHNDER, A.T, ROSAKIS, A.J

“…Experiments designed to investigate the applicability of the Rosakis-Freund (1982) optical method of caustics to the measurement of elastic-plastic fracture…”
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In-channel micromechanical plate interacting with fluid flow by Czaplewski, D.A., Ilic, B., Zalalutdinov, M., Olbricht, W.L., Zehnder, A.T., Craighead, H.G., Michalske, T.A.

“…We have studied the interaction of fluid with a suspended micromechanical plate encapsulated in a fluidic channel. Fluid flowed into the channel at a flow rate…”
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