Browsing Mechanical Engineering by Title
Now showing items 218-237 of 465
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High power series elastic actuator development for torque-controlled exoskeletons
(Springer Nature, 2019)This paper presents the development procedures of a high power series elastic actuator that can be used in torque-controlled exoskeleton applications as a high-fidelity torque source. In order to provide a high torque ... -
High temperature characteristics of Al2024/SiC metal matrix composite fabricated by friction stir processing
(Elsevier, 2018-07-25)In the present study, friction stir processing (FSP) is used for the synthesis of an aluminum metal matrix composite (MMC) reinforced by SiC particles. MMC specimens with reinforced microstructures exhibited significant ... -
High temperature deformation behavior of 4340 steel: activation energy calculation and modeling of flow
(Elsevier, 2013-12)The 4340 steel is extensively utilized in several industries including automotive and aerospace for manufacturing a large number of structural components. Due to the importance of thermo-mechanical processing in the ... -
High temperature flow response modeling of ultra-fine grained titanium
(MDPI AG, 2015)This work presents the mechanical behavior modeling of commercial purity titanium subjected to severe plastic deformation (SPD) during post-SPD compression, at temperatures of 600-900 °C and at strain rates of 0.001-0.1 ... -
High-speed visualization of acoustically excited cavitation bubbles in a cluster near a rigid boundary
(Springer Berlin Heidelberg, 2017)In the present work, high-speed visualizations at one million frames/s have been used to study the oscillation characteristics of acoustic cavitation bubbles. The bubbles are generated by acoustic cavitation using an ... -
A high-torque density compliant actuator design for physical robot environment interaction
(IEEE, 2020)Compared to the traditional industrial robots that use rigid actuators, the advanced robotic systems are mobile and physically interact with unknown and dynamic environments. Therefore, they need intrinsically safe and ... -
Hot deformation behavior of ultra-fine grained pure Ti
(Trans Tech Publications, 2013-11)In the present study, compression tests were performed at a strain rate of 0.001 to 0.1 s(-1) and in the range of 600 degrees C to 900 degrees C to investigate the high temperature deformation behavior and flow stress model ... -
Identification and evaluation of cracks in electrostatically actuated resonant gas sensors using Harris Hawk / Nelder Mead and perturbation methods
(Techno-Press, 2021-01)In this paper we study the static deflection, natural frequency, primary resonance of an electrostatically actuated cracked gas sensor. Besides, a novel hybrid metaheuristic algorithm is proposed to detect the location and ... -
Identification of unbalance characteristics of rotating machinery using a novel optimization-based methodology
(Springer, 2022-02-26)In this study, a novel optimization-based method is proposed to determine the parameters of a rotating unbalance in a rotor-bearing system. For that purpose, the weighted sum of squared difference between the analytical ... -
Image registration method for mobile-device-based multispectral optical diagnostics for buildings
(The Optical Society, 2019-09-10)The recent advances in mobile device hardware and software introduced new opportunities to perform more advanced computation and measurements for buildings. Multispectral optical imaging is a widely recognized technique ... -
Impact of electronics over localized hot spots in multi-chip white LED light engines
(IEEE, 2019)In recent years, demand towards high power white LEDs has risen significantly covering a wide range of application areas. While many industries prefer more light extraction using less number of LED chips on their luminaires, ... -
Impact of functional nanofluid coolant on radiator performance
(ASME, 2019-08)While a number of liquids are preferred in many heating and cooling applications, their thermal capacity can be a limiting factor in many thermal systems. Therefore, a series of methods such as use of mixtures of two or ... -
Impact of junction temperature over forward voltage drop for red, blue and green high power light emitting diode chips
(IEEE, 2017)Commercially available light emitting diodes (LEDs) that have high efficiencies and long lifetime are offered in advanced packaging technologies. Many cooling systems were developed for current LED systems that enable a ... -
Impact of orifice location on the mechanical response of side and central orifice synthetic jets
(2018-07-24)Synthetic jets have been at the focus of a number applications including flow control and thermal management of microelectronics due to their unique characteristics of transferring linear momentum through a flow structure ... -
Impact of orifice size over mechanical, flow and thermal performances of synthetic jets
(IEEE, 2018-07-24)Recent electronic systems require more aggressive cooling solutions due to their high functionality, densely packaged components and localized heating compared to low functionality systems in the last decade. Synthetic ... -
Impact of oxidation on pool boiling heat transfer performance over flat plates exposed to extended operating conditions
(IEEE, 2023)Phase change heat transfer is utilized in a number of high heat flux applications. In order to ensure reliable functionality at moderate temperatures, one has to guarantee a stable long-term operation. In this experimental ... -
Impact of pad conditioning on thickness profile control in chemical mechanical planarization
(Springer Science+Business Media, 2013-01)Chemical mechanical planarization (CMP) has been proven to be the best method to achieve within-wafer and within-die uniformity for multilevel metallization. Decreasing device dimensions and increasing wafer sizes continuously ... -
Improvement of the computational efficiency of metaheuristic algorithms for the crack detection of cantilever beams using hybrid methods
(Taylor & Francis, 2022-07-03)This study examines the capability of various optimization algorithms and proposes novel hybrid algorithms for more precise prediction of open-edge cracks in cantilever beams. The natural frequencies of the beam with a ... -
Improvement of the fatigue performance of an ultrafine-grained Nb–Zr alloy by nano-sized precipitates formed by internal oxidation
(Elsevier, 2008-04)The formation of nano-sized precipitates in an ultrafine-grained Nb–Zr alloy was investigated. ZrO2 precipitates induced by internal oxidation during heat treatment at low homologous temperatures significantly intensify ... -
Improving selectivity on germanium CMP applications
(ECS, 2014)In the presented paper, the adsorption characteristics of cationic and anionic surfactants on germanium and silica were studied in order to improve selectivity in germanium based shallow trench isolation chemical mechanical ...
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