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Online since: July 2020
Authors: Nabaa S. Radhi, Nawal Mohammed Dawood, Zainab S. Al-Khafaji
Along with an improvement of corrosion resistance, this SiC coating is able to make changes in the surface feature in comparison with the materials without affecting the characteristics of the bulk [24, 25].
Radhi, Investigation some properties of (Zn-Ni-SiC) composites coating on low carbon steel, The Iraqi Journal for Mechanical – and Materials Engineering, 2018
Orhan, Electrodeposited Ni/SiC nanocomposite coatings and evaluation of wear and corrosion properties, Surf.
Deb, The effect of surface treatment of hydroxyapatite on the properties of bioactive bone cement, J. of Mater.
Rajma, Influence of SiC, Si3N4 and Al2O3 particles on the structure and properties of electrodeposited Ni, Mater.
Online since: May 2015
Authors: Emanoil Linul, Dan Mihai Constantinescu, Dragoş Alexandru Apostol, Liviu Marsavina
The last two columns give the stress intensity factors in Mode I and Mode II normalized to the critical stress intensity factor established in Mode I.
Ashby, Cellular Solids, Structure and Properties, second ed., Cambridge University Press, Cambridge, 1997
Carlsson, Mechanical properties and fracture characterisation of cross-linked PVC foams, J.
Anderton, Fracture properties of a rigid PUR foam over a range of densities, Polymer 20 (1979) 247-253
Tabatabaei, Computation of mixed mode stress intensity factors in a four-point bend specimen, Appl.
Online since: September 2011
Authors: Rui Ping Zhang, Xue Ping Guo, Peng Wei Xiang
The Effect of Normal Pressure Air Plasma Treatment on the Hydrophilicity of PPS Fiber Xueping Guo1, a, Ruiping Zhang1,b and Pengwei Xiang 1,c 1College of Textile Engineering and Art ,Taiyuan University of Technology, Shanxi, 030600, China btylgzrp@163.com Keywords: Normal Pressure Air Plasma, PPS fiber, Hydrophilic Property, breaking strength Abstract.
The surface of fibers become rough because of etching and polar groups that are introduced through the low temperature plasma treatment, meanwhile the hydrophilic property of fibers is improved[4].
Water absorption(%) = ﹛M-m)/M﹜×100 Mechanical strength.
The amount of polar groups is the dominant factor that influences the water absorption.
Processing power reflects the energy brought to substance and how large it is directly affects the extent of the damage applied to the surface of fibers, so the breaking strength of the fiber decreased along with the intensifying of the damage due to the increasing of the power.
Online since: March 2014
Authors: B.J. Meenan, J. Manson, D. Dixon
Their favorable properties include biocompatibility, a tailorable degradation profile, degradation into carbon dioxide and water through hydrolysis, good mechanical strength and the ability to be dissolved in common solvents for processing [6,7,8].
Gold nanoparticles (AuNPs) are an excellent candidate as a drug delivery vehicle due to their unique physical and chemical properties, enabling the transport and subsequent release of therapeutic payloads such as drugs or genetic material to specific tissue sites.
When the particle has entered the cell, the payload can be released by way of the AuNP’s photo-physical properties or by using intercellular glutathione levels [9,10,11,12].
Huang, Survival following surgery and prognostic factors for recently diagnosed maligant glioma, J.
Sander, Solvent effects on the microsctructure and properties of 75/25 PLGA tissue scaffolds.
Online since: March 2013
Authors: You Xin Wei, Jiang Chen
Study on The False Joint’s Layout Mode of Unit Double-Block Ballastless Track Bearing Layer WEI Youxin1, a, CHEN Jiang1, b 1MOE Key Laboratory of High-speed Railway Engineering, Southwest Jiaotong University, Chengdu 610031, China ascu-weiyouxin@163.com, bchenjiangxnjd@163.com Keywords: railway engineering; double-block ballastless track; mechanical analysis; crack; false joint; expansion joint.
The mechanical model of the structure is shown in Fig.3.
To guarantee line stability of structure in 60 years’ service life, in this thesis, structural stress response calculation under temperature force will be divided into two states: one is bonding well between bed slab and bearing layer, one is complete separation between bed slab and bearing layer. 3.1 Interlayer Bonding Well Main factor, which caused transverse crack of bearing layer, is internal longitudinal tensile stress of bearing layer more than its tensile strength, so the longitudinal tensile stress is calculated under different amplitudes of temperature drop, the calculation result shown in Fig.4.
Fig.5 Longitudinal stress of bearing layer In temperature drop, bearing layer not only bear temperature force, but also affected by frictional resistance of bed slab’s bottom, temperature stress plus interlayer frictional resistance is the value of bearing layer longitudinal stress.
Fig.6 Precipitation of fine particle in foundation bed Fig.7 Optimization of false joint design Combining with position of expansion joint that mechanical properties of the bearing layer is easy to crack, this thesis put forward that cutting false joint of bearing layer’s optimized measures in waterish and bad foundation of the lower section: bearing layer laid on earthwork cloth in expansion joint each 1m range before and after, both sides of earthwork cloth set false joint of bearing layer.
Online since: October 2012
Authors: Hong Dong Li
Under cyclic loading “mechanical spring”, crack, bump, in extreme cases the mud should flow out, much of road pavement destroyed, so that the road boiling is set up.
Affect factors of road boiling 1.
Drainage is difficulty on the ground, embankment fill height is not enough, ditch ponding or use the ditch to farmland irrigation, the base is close to the ponds, underground water degree is high in some road section, all of these afford enough water resource is the important factor of road boiling. 2.
soil property.
It shows the sustained capillary water has vertical motion and it has the property of the gravity water, so it can flow to lower place, but the speed is so slow.
Online since: April 2013
Authors: Sheng Po Chang
The ambient conditions during annealing also affect dopant diffusion.
In this work, we expected to improve the ohmic property of n-GaAs.
However, it was found that the electrical properties were improved with increases in the annealing temperature.
Among the samples, the metal contact annealed in N2 at 450°C had the best electrical properties.
This is because the damaged surface produced high series resistance and a small fill factor.
Online since: December 2012
Authors: Iman Mohammadi, Hadi Khabbaz
Swelling process depends on many factors such as CRM particles size, CRM and binder chemical properties, time and temperature of blending and so on.
Marvillet[20] developed a prototype stirring device for analysing the different the factors that affect mixture workability.
Temperature, time and efforts are factors involved in blending of CRM with binder.
The reaction rate is difficult to be measured because of different factors that affect the blending.
Abdelaziz, Effect of crumb rubber concentration on the physical and rheological properties of rubberised bitumen binders.
Online since: July 2015
Authors: Chih Kai Hu, Tomi T. Li, Hung I Chien
Li1,c 1Department of Mechanical Engineering, National Central University, Taoyuan 320, Taiwan (R.O.C) ayuamsykaqnomito@gmail.com, chhmax47@gmail.com, ctomili@cc.ncu.edu.tw Keywords: MOCVD process, epitaxy, thermal flow field, reactor geometry, operating parameter, rotating disk, heat and mass transfer Abstract.
It is investigated how thermal flow field, and the operating parameters affect molar concentration of each reactant, and the thin film uniformity.
These two-dimensional (2-D) and time dependent conservation equations along the vertical reactor are coupled together and form a set of partial differential equations: They describe the steady state flow of an ideal incompressible gas with desirable properties that depend on the local flow and temperature distributions.
Chemical Reaction mechanism Gas Reaction A n Ea 1 TMG → MMG + C2H6 1.00E+47 1.00E+47 -9.18 Surface Reaction 2 TMG + N(S) → TMG(S) 1.16E+05 2.98 0 3 TMG(S) → TMG + N(S) 1.12E+14 0.55 49675 4 NH3 + TMG(S) → TCOM1(S) 3.35E+07 3.33 0 5 TCOM1(S) → NH3 + TMG(S) 5.70E+13 -0.161 11922 6 TCOM1(S) → 3CH4 + GaN(B) + N(S) 1.49E+11 0.609 49675 7 MMG + N(S) → MMG(S) 1.16E+05 2.98 0 8 MMG(S) → MMG + N(S) 1.12E+14 0.55 107673 9 NH3 + MMG(S) → COMPM1(S) 3.35E+07 3.33 0 10 COMPM1(S) → NH3 + MMG(S) 5.70E+13 -0.16 8146 11 COMPM1(S) → H2 + GaN(B) + Ga(S) + CH4 3.68E+09 2.05 59610 Where the variables of A, n, Ea are collision factor, correction parameter, activation energy, respectively.
Online since: October 2014
Authors: Shu Guo Zhao, Cheng Cheng, Cheng Long Li
When coating is under normal force and tangential force, through changing the thickness of the layers, the coating crack length and width of crack, coating in force is analyzed when the interface stress affects on coating.
Therefore, the binding force between coating and substrate is the key factor to evaluate the quality and practicability.[1]The micrographs of coating and crack as shown in figure.1 and figure.2.
References [1] Zhao Wenyun, Coating experimental research of mechanical properties: (Bachelor's Degree Thesis), Tianjin; TianjinUniversity, 2002
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