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Online since: December 2010
Authors: Bao Chun Chen, Jing Gao
The parametric study reveals that the load-carrying capacity is influenced by many factors including the rise-to-span ratio, slenderness ratio, loading cases and material properties.
In this study, the NL_Beam3D developed by Wu (2007) [5] is adopted to simulate the mechanical response of the CFST-CSW arch.
Apart from S/C ratio, grade of the in-filled concrete also affect the strength of the cross section.
It can be noted that slenderness of the arch is also an important factor for ultimate load.
But in practice, it should be determined by considering the economic factors.
Online since: June 2017
Authors: Mu Huo Yu, Ke Qing Han, Cui Qing Teng, Ming Lin Qin, Jing Liu, Fan Yu
Although these methods for surface treatment improved aramid/matrix interfacial properties, they often lead to negative effects on the damaging of the mechanical strength, elevated production cost and complicated work procedures.
Zheng investigated the effects of SCCO2 fluid on the structures and properties of PMIA fiber[22,23].
During the supercritical carbon dioxide treatment, three important factors, including treatment temperature, pressure and time dramatically affect the interfacial adhesive performance between the reinforcing PPTA-pulp and the rubber.
Effect of supercritical carbon dioxide treatment on the dyamic mechanical properties of PPTA-pulp reinforced rubber composites.
DMA was conducted to investigate the dynamic mechanical properties of PPTA-pulp reinforced rubber composites.
Online since: December 2012
Authors: Yong Qian Zheng, Jin Ping Zhuang
The creep of steel bars, bond slip between steel bars and concrete, transformation of material properties were considered in the force analysis.
Temperature analysis The thermal properties for steel bars and concrete (e.g. conductivity, specific heat) presented by Lie and Denham [5] are adopted.
The modified expression of concrete thermal properties proposed by Hamarthy [6] is used at elevated temperature.
The user subroutines can be incorporated into ABAQUS to consider the creep of steel and transform the material properties
Denham: Factors Affecting the Fire Resistance of Square Hollow Steel Columns Filled With Bar-Reinforced Concrete Int.
Online since: August 2013
Authors: Jian Feng Lin, Zhi Tan, Yu Liang Wu, Kuo Liu
The influence factors of machine tool's machining precision are geometric errors, thermal errors and cutting force errors.
ZHANG Yaoman et al[3] analyzed thermal properties of spindle assembly and headstock of machining center and calculated the thermal distort of spindle and headstock.
On the base of the literature above, thermal error test and temperture test are done on a certain machine center's mechanical principal spindle.
Then, temperture begin to be main affect factor of displacements of all directions.
FEA of Thermal Properties of Spindle Assembly and Headstock of Machining Center[J].
Online since: June 2006
Authors: Mečislovas Mariūnas, Kristina Kojelyte
Therefore, any possibility affording estimation of mechanical performance of a muscle, as an adaptive subsystem, is a matter of utmost importance.
The occurrence of fatigue within the muscle is usually stipulated by a majority of external and internal factors.
The relationship of maximum biosignal level 2Amax and loading duration under constant load in a) male and b) female age groups, 1 - F = 12 N, 2 - F = 18 N In reference [4] the analysis into the muscle's performance under constant force conditions has led to the generation of the following relationship applicable to biosignal energy: ∫= t dt R )t(U F )t(x 0 2 1 , when const)t(R = , ∫= t dt)t(U FR )t(x 0 21 , (1) where F is the force affecting the muscle ( const=F ); R stands for resistance of the muscle, U(t) is muscle biosignal intensity and t represents duration of the muscle loading.
Reich: When Active Muscle Lengthen: properties and consequences of eccentric contractions (News of Physiology Science, Vol. 16, 2001), p. 256 - 261 [3] M.
Milner: Muscle-Tendon Mechanical Impedance http://www.sfu.ca/~tmilner/aclb3.pdf [10] L.
Online since: August 2022
Authors: Amelia Wong Azman, Zuraida Ahmad, Nur'Aishah Ahmad Shahrim, Intan Seirra Masaad, Nur Afiqah Zamros, Yose Fachmi Buys, Norshahida Sariffudin
This paper aims to investigate the electrical properties differences between PEDOT:PSS doped SNP-based films and hydrogels.
Therefore, this work aimed to compare the electrical properties of the prepared PEDOT:PSS films and hydrogels doped with different silver nanoparticles (SNP) contents by drop-casting and freeze-thaw methods, respectively.
The morphological properties of PEDOT:PSS incorporated with SNP were observed by Scanning Electron Microscope (SEM), as shown in Figure 5.
This indicated the films mostly affect the electrical behaviour of PEDOT:PSS/SNP compared to hydrogels.
The findings are supported by the morphological properties of the films, which appears rough surface after adding SNP, thus believed to provide pathways for charges carrier in the material.
Online since: February 2011
Authors: Feng Guo, Rong Ming Liu, Peng Fei Li
The researches had shown that the protect properties of the ceramic coating to the substrate material were closely related with its structure and phase composition, and essentially were dependent on the electrolyte composition, electrical parameter and other process conditions [4-6], of which voltage parameter was an important factor[7,8].
Discussion The micro-arc oxidation process includes two stages, that is initial oxidation film formation and ceramic coating growth, in which the thermochemistry, electrochemistry and plasmachemistry actions are direct effect factors to formation, growth of coating as well as morphology, structure of coating, just through these factors the voltage parameters affects micro-arc oxidation process.
Matthews “Thickness effects on the mechanical properties of micro-arc discharge oxide coatings on aluminum alloys” Surface and Coatings Technology, Vol.116-119, 1055-1060, September 1999 [3]J.A.
Clyne “Thermo-physical properties of plasma electrolytic oxide coatings on aluminium” Surface and Coatings Technology, Vol.199, Issues 2-3, 22, 168-176, September 2005 [4]V.
Kamyshanskii “Formation of structure and properties of coatings deposited by micro-arc oxidizing on parts fabricated from aluminum alloys” Metal Science and Heat Treatment, Vol.42, Number 10, 411-415, 2000
Online since: March 2009
Authors: Kari Mäntyjärvi, Markku Keskitalo
The mechanical properties were tested with tensile tests.
The plates were cut from three cold-rolled coil consignments with small deviations in their mechanical properties.
The measured Cutting Edge Factors are shown in Table 5.
Cutting edge factors of weld edges Test no.
Typically, the mechanical properties of laser welds are better than those of conventional welds [7].
Online since: September 2015
Authors: František Lofaj, Martin Sahul, Ľubomír Čaplovič, Michal Novák, Petra Hviščová, Rudolf Podoba, Marián Haršáni
Introduction Nanohardness (HIT) and elastic modulus (EIT) are among the most crucial mechanical properties in thin coating evaluation.
Hardness data may be strongly influenced by external and internal factors: deposition parametres, microstructure and residual stresses (σr) presented in thin coatings.
Obviously, thickness is among the most important parameter affecting the level of the intrinsic stresses [4].
Mechanical and Tribological Properties of HiPIMS and HiTUS W – C coatings.
Effect of annealing on microstructure and mechanical properties of laser deposited Co – 285 + WC coatings.
Online since: July 2008
Authors: Luciano A. Lourençato, Davi M. Benati, Eugênio José Zoqui
The development of new low-cost alloys and a new low-cost process could be the key factor for the dissemination of this technology.
Thus, the viscosity is more strongly affected by the amount of liquid than by the silicon content.
The holding time in the semisolid range affects materials in different ways.
Table 3 lists the preliminary tensile properties of samples tested after reaching the desired semisolid temperature, i.e., without holding time or at the highest apparent viscosity.
Additional heat treatments, at T4 or T6 for instance, could improve the final mechanical properties and lead to greater elongation.
Showing 11451 to 11460 of 26166 items