Search Options

Sort by:

Sort search results by

Publication Type:

Publication Type filter

Open access:

Publication Date:

Periodicals:

Periodicals filter

Search results

Online since: October 2007
Authors: Seong Jun Park, Sung Joon Kim, Dong Woo Suh, Chang Seok Oh
Their excellent mechanical properties are ascribed to the martensitic transformation of retained austenite during plastic deformation.
However, close attention has not been paid to the factors that may affect IQ or CI such as crystallographic orientation and boundary effect.
The specimen for EBSD measurement was prepared by mechanical polishing and electropolishing with an electrolyte of 5% perchloric acid diluted by ethanol at 4 volts.
Online since: September 2011
Authors: Mo Yuan Zhou, Guan Yang Liu, Ke Ke Lu
From the perspective of mechanical design, not only the maximum output force of the actuator is limited, but the mechanical strength of the device will constrain the final output power.
So finding a suitable range of output power, which can meet application needs, without degrading other properties, is an optimal choice.
The mass, inertia and friction of the move part affects the back-drivability of the haptic device and the inertia is the leading factor in this device. 5.Approach 5.1Actuator Available actuators for haptic applications are active actuators, passive actuators, and hybrid actuator.
This nonlinear factor will affect the stability of control system and the precision of transmission.
Also the tension mechanism is a very important factor which influences the transmission accuracy.
Online since: May 2011
Authors: Wang Jun Feng, Rui Shan Li, Rui Fan, Ying Shan Chen, Cui Huan Li, Hua Yang
Spinel NiFe2O4 is a good magnetic material, but apply properties were affected by the average size of the particles.
At present, several techniques have been developed to prepare NiFe2O4 nanoparticles, including sol–gel method[4-6] ,Hydrothermal method[7,8],shock wave method[9],mechanical alloying[10],SHS[11,12]and etc[13,14].
The carbon-adsorb auto combustion method was a good powder prepared technology which use of the activated carbon can adsorb anions and cations from the solution,due to the special geometry structure and chemical properties of the activated carbon surface, and then the nanoparticles obtained through dryness process and thermal treatment.
The TEM images were obtained on a JEM-1005X transmission electron microscope.The magnetic properties of the NiFe2O4 nanoparticles was analyzed with 7340-type vibrating sample magnetometer.
The reaction mechanism of carbon-adsorb The adsorption of activated carbon mainly come from the inhomogeneous geometry structure and chemical properties of the activated carbon surface.
Online since: August 2011
Authors: Marie Laure Locatelli, Rabih Khazaka, Zarel Valdez-Nava, Mireille Bechara, Sombel Diaham
The other important properties to be studied are the dielectric permittivity er, the loss factor tgd, and the breakdown electric field Ebr.
HT insulating materials and examples of parameters affecting sDC values Ambient air aging effect on sDC for a HT polyimide film Polyimides have been used for a long time in electronics, especially for semiconductor passivation or assembly insulating interlayer.
Aging under N2-atmosphere revealed no significant effect on the PI sDC, thus clearly identifying the role of O2 in the evolution of the material properties.
For HT applications, Si3N4 ceramic is preferred to AlN for its higher mechanical resistance under thermal cycling.
It also helps to identify the impact of the manufacturing process on the final properties, as already detected on sAC spectra.
Online since: February 2018
Authors: Vincent Ji, Lei Li, Yan Liu, Xiao Nan Mao
High strength, low density, and excellent corrosion resistance are the main properties that make titanium attractive for a variety of applications.
The temperature and power of sputter affect the formation of fcc-Ti.
The temperature is a key factor of the formation of fcc-Ti.
Fecht, Formation of face-centered-cubic titanium by mechanical attrition, J.
Mielczarski, Properties of titanium nitride films prepared by direct current magnetron sputtering, Mat.
Online since: November 2012
Authors: Olga Naboka, Katia Rodriguez, A. Farshad Toomadj, Anke Sanz-Velasco, Guillermo Toriz, Per Lundgren, Peter Enoksson, Paul Gatenholm
Besides the chemical structure of the carbonization precursor and exposure to external shape forming factors (such as the use of matrices and control of carbonization conditions) macromolecular organization of polymers (aggregate formation in solutions, crystalline structure) could also significantly affect the properties and morphology of synthesized carbon [3,4].
It is well established that the crystalline structure and mechanical performance of regenerated cellulose is affected by the chemical composition, time, and temperature used in the hydrolysis of cellulose derivatives [5-7].
Summary In the present work the influence of electrospun cellulose regeneration method and carbonization temperature on the properties of the resulting carbon nanofibers was investigated.
Carbon nanostructured materials with controlled properties synthesized in this project are prospective for use as membranes, adsorbents, thermal insulators and electrodes for fuel cells and supercapacitors.
Changes in electrical and microstructural properties of microcristalline cellulose as function of carbonization temperature, Carbon, 48 (2010), 1012-1024.
Online since: April 2020
Authors: Stefanus Kristiawan, Halwan Alfisa Saifullah, Koichi Maekawa, Kenichiro Nakarai, Nobuhiro Chijiwa
As the longitudinal tensile reinforcement strain influences the shear strength of RC beam, the shear resistance of the beam under sustained load may also be affected by the amount of longitudinal reinforcement.
The shear resistance of RC beams without shear reinforcements is affected by several factors among others, shear span-to-depth ratio, material properties, axial forces, size of the beam, longitudinal reinforcement ratio, and types of loading.
Because shear crack formation is indirectly affected by the tensile reinforcement configuration, the shear strength of the beam under sustained load may also depend on the reinforcement configuration.
Sagaseta, Shear Strength of Concrete Members without Transverse Reinforcement: A Mechanical Approach to Consistently Account for Size and Strain Effects, Eng.
Sagaseta, Shear Strength of Concrete Members without Transverse Reinforcement: A Mechanical Approach to Consistently Account for Size and Strain Effects, Eng.
Online since: December 2013
Authors: Jian Long Zheng, Jun Hui Zhang, Yu Zhou
Based on the latest research results at home and abroad, combined with the stress and physical properties of subgrade soils in south moist and heat area, the laboratory test method for dynamic rebound modulus of subgrade soil in this area was determined.
Introduction Resilient modulus of subgrade soil is a mechanical parameter of strength, but also the main parameter of the design for the pavement structure.
They are static values [1,2] that difficult to accurately reflect the mechanical response of the repeat dynamically loads of the existing highway embankment.
In fact, the resilient modulus is mainly affected by stress conditions, physical conditions (moisture content and density) and the nature of the composition.
Subgrade soil moisture content is an important factor affects its strength.
Online since: October 2016
Authors: Stefan Bosse, Armin Lechleiter, Dirk Lehmhus
Main challenges include processing speed and adaptivity to system change, both prerequisites for SHM-based weight reduction via relaxed safety factors.
Among them is the need for fast, and ideally real-time, data evaluation, which can be motivated considering Load and Structural Health Monitoring (LM/SHM) as a use case and the associated aim of saving weight through structure- or material-integrated systems: If safety factors are to be relaxed based on the implementation of monitoring systems, there is a need for information to be available within a certain time interval, either with a strict upper time limit (hard real-time), or a within an average time linked to typical service intervals to guarantee operational safety of the system (soft real-time), in order to affect the necessary changes in usage patterns and thus service conditions allowing component and system to survive despite performance losses.
Questions in this respect include the issue of missing sensor data caused by failure of individual sensors, material property change induced by variations in service conditions, influence of statistical scatter of material properties or component geometry and structural damage caused, e. g., by short time events like impacts temporarily exceeding design loads and thus introducing local damage.
This approach do not require a mechanical model of the structure under test.
An decision-tree ML approach was used to predict different load cases of a mechanical structure.
Online since: January 2013
Authors: Yu Fang Zhang, Lu Yun Chen, Nian Yang
RSM coupled with the central composite design was used to optimize the mechanical properties of composites [10].
(11) Here, represents the quadratic effect of the ith factor and represents the cross product effect, or interaction effect, between the ith and jth factors.
Fig.1 shows the uniform Latin square method designed the rational experimental samples with two factors, in which, there are 11 points sampling in the spatial arrangement.
The acoustic properties of the air are: density ρ=1.225 kg/m3; the speed of sound c=343 m/s; Sound power reference value W0=1×10-12 Watt.
[10] K L Low, S H Tan, S H S Zein, D S Mcphail and et al.Optimization of the mechanical properties of calcium phosphate/multi-walled carbon nanotubes/bovine serum albumin composites using response surface methodology.
Showing 18761 to 18770 of 26166 items