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Online since: October 2014
Authors: Dong Xue Hao, Jin Zhong Zhang, Rong Chen
The Influence of Geometry of Pedestal Piles in Silt on Uplift Behavior HAO Dong-xue1, a*, ZHANG Jin-zhong1,b and CHEN Rong1,c 1School of Civil Engineering and Architecture, Northeast Dianli University, Jilin, Jilin Province, China ahaodongxue2005@126.com, bjincui521521@126.com, clg1316cih@126.com Keywords: uplift behavior; rigid pedestal piles; silt; model test Abstract: The uplift behavior of rigid pedestal pile is affected by the geometry, which is not totally same with plate anchor.
The lateral boundaries of tank is about 5.8~11.6 times diameter of pile base, which will not affect the uplit behavior of piles.
Soil properties and preparation The soil sample is commercial silt of Shulan Town in Jilin City.
Table 1 Physical and mechanical parameters of Shulan silt (g/cm3) wop (%) c (kPa) (o) wL (%) wP (%) 1.77 17 16.0 20 23 14 Test plan The objectvie of present test is to investigate the influence of geometry of piles including the angles of enlarged base, ratio of base to shaft diameter, embedment ratio.
Table 2 Test plan list Influence factors Test name H/D d(mm) D(mm) (o) Angle of enlarged base S1-1 3 114 228 0 S1-2 15 S1-3 30 S1-4 45 S1-4 60 Ratio of base to shaft diameter, D/d S2-1 3 114 171 45 S2-2 228 S2-3 342 Embedment ratio, H/D S3-1 2 114 228 45 S3-2 3 S3-3 4 Results Influence of the angles of enlarged base The relationships of uplift load and displacement of half-cut models were plotted in figure 2(a), herein, uplift resistances include the weight of piles.
Online since: March 2021
Authors: Persia Ada N. de Yro, Joshua Nathaniel B. Padrigo, Gerald Mari O. Quiachon, Christian Matthew P. Mabborang
Possessing a high carbon yield of 50% and its CNF exhibit excellent mechanical properties [3].
Polycaprolactone (PCL) is known to be easily electrospun because of its excellent mechanical properties and its semi-crystalline polymer property, which enables to be easily formed at low temperatures [4].
Factors such as optimization of concentration for CQD–PAN/PCL nanofiber mat should be considered for further improvement of the study.
“Synthesis and Properties of Photoluminescent Carbon Quantum Dot/Polyacrylonitrile Composite Nanofibers”, Smart Science, 1-8, 2017 [8] M.
“A Mini Review on Carbon Quantum Dots: Preparation, Properties, and Electrocatalytic Application”, Frontiers in Chemistry, Vol. 7, No. 671, 1–9, 2019 [13] D.L.
Online since: November 2011
Authors: Diego Mantovani, Stéphane Turgeon, P. Chevallier, Maxime Cloutier
Chosen for its excellent mechanical properties, essential for biomedical applications, stainless steel is naturally covered with a mixture of iron and chromium oxides, creating a surface layer which is brittle and mechanically unstable under stress [2].
Moreover, due to its exposure to the blood flow, corrosion has been a major issue as degradation of mechanical properties and release of carcinogenic and toxic metallic ions has been observed in implanted stainless steel devices [2, 3].
CFx deposition on SS316L has been investigated and previous results showed good adhesion properties and film stability over time.
Hence, this process did not seem to exhibit superior anti-corrosion properties and was not studied any further.
The properties of the PR-treated samples seemed optimal for stent applications.
Online since: January 2016
Authors: Khalid M. Saqr, Ahmed el Gibaly, Omar Diaa, Tamer Hassan, Omar A. El-Bassiouny, Ali I. Shehata
Saqr1,3,f* [1] Mechanical Engineering Department, College of Engineering and Technology, Arab Academy for Science, Technology and Maritime Transport P.O.
While the majority of research works assumes that a Newtonian viscosity model is sufficient to predict the aneurysmal hemodynamics [1-3], recent studies have shown that the non-Newtonian properties of the blood significantly affect aneurysmal hemodynamics [4-7].
The aneurysmal WSS is a main factor that affects the rapture of cerebral aneurysms [15].
Low WSS values on the aneurysm wall are known to be an important rupture risk factor, and severe gradients do contribute to the aneurysm growth via a pathological route.
Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine, 2011. 225(6): p. 597-609
Online since: June 2011
Authors: Jun Wang, Jing Ming Fan, Chang Ming Fan
Flow Dynamic Simulation of Micro Abrasive Water Jet Jingming Fan1,a, Changming Fan1,b and Jun Wang2,c 1School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, China 2 School of Mechanical and Manufacturing Engineering, The University of New South Wales, Sydney, NSW 2052, Australia ajmfan@gdut.edu.cn; bfanchm@gdut.edu.cn; cjun.wang@unsw.edu.au Keywords: Micro abrasive water jet; Computation fluid dynamics (CFD) simulation; Impinging jet; Particle velocity Abstract.
More competitive with micro EDM and laser cutting, MAWJ technology, which has the distinct advantages of no thermal distortion, no heat affected zones, no mechanical stress, high machining efficiency and small cutting force, offers potential for the micro processing of difficult-to-machining materials, especially if no thermal stress is allowed.
Kinetic energy of MAWJ plays a key factor in the cutting capacity, while it is mostly affected by impulsive velocity of the abrasives.
Optimization of nozzle size and geometry and the jet properties are essential to obtain a better cutting performance in MAWJ.
Furthermore, the particle trajectory agrees with the findings in literature that the turbulent dispersion is an important factor on the particle movement.
Online since: October 2006
Authors: Gon Khang, Jung Hwa Hong, Young Hwan Park, Sang Ok Ko, Soon Hyuck Lee
In general, bone strain generated streaming potential is affected by viscosity, flow rate, interstitial pressure distribution.
The interstitial fluid pressure generation characteristics in bone are functions of its poroelastic properties and boundary conditions.
The mostly important factor governing the interstitial fluid flow is the fluid boundary condition.
Becker: Generation of Electric Potentials by Bone in Response to Mechanical Stress Science Vol. 137 (1962), p. 1063-1064 [3] R.B.
Mow: Streaming Potential of Human Lumbar Annulus Fibrosus is Anisotropic and Affected by Disk Degeneration J.
Online since: July 2013
Authors: Timothy Spence, Makhlouf M. Makhlouf
In this paper, a creep model is developed and used to describe how the residual surface stresses created by milling and by fly cutting affect the geometry of an aluminium alloy component as it creeps.
The Power Law Creep equation for crystalline materials is given by Eq. 1, ε=kTσme-QcRT. (1) In Eq. 1, the variables that affect the strain rate are stress, s, and absolute temperature, T.
This is because the term k includes not only the vibration frequency of the unit of flow, but also the change in entropy and a factor that depends on structure, i.e., the distribution of dislocations, precipitates and grain boundaries in the alloy [12].
Imgram et al., Study of Microplastic Properties and Dimensional Stability of Materials, AFML-TR-67-232, Part II, Battelle Memorial Institute (August 1968) 24
Dowling, Mechanical Behaviour of Materials, second ed., Prentice Hall Publishing Company, Upper Saddle River, NJ, 1998, pp. 718
Online since: April 2014
Authors: Wei Wang, Li Tian, Lin Zhao, Xiao Wei Liu, Xiao Wei Han, Guo Hua Ye, Hai Feng Zhang
We paste polyimide (PI) tape on the separation chamber`s glass side, which has ideal insulation property, thermal endurance and corrosion resistance.
Otherwise, PI tape doesn’t affect separation effect which is affected by surface compatibility of glass and PDMS.
It has good thermal endurance, mechanical properties and releasing characteristic to make mold with concave benches as structure layer.
Formula 2 shows diffusion broadening is the main factor in all three factors of zone broadening.
This also shows that the diffusion broadening is the main factor of zone broadening.
Online since: October 2011
Authors: Viorica Simon, R. Ciceo Lucacel, I. Titorencu, V. Jinga
Physical properties and biological performance of bioactive glasses and glass-ceramics tested in vitro V.
The bioactive properties of these glasses depend on the presence of large amounts of sodium and calcium modifier cations, which break the Si–O–Si bridges and lead to fragmentation of the silicate network on the account of the increased number of nonbridging oxygen atoms [3].
Understanding of composition-structure-properties relationship of these materials at atomic level is of great importance to obtain biomaterials for certain applications.
The tissue bonding ability of bioactive glasses, and generally of bioactive materials, is related to the presence of a hydroxyapatite layer on their surface, that promotes further cellular steps, such as incorporation of collagen and interaction with other biomolecules and tissue growth factors [6, 7].
Hill, Effect of P2O5 content in two series of soda lime phosphosilicate glasses on structure and properties – Part I: NMR, J.
Online since: May 2012
Authors: Li Song, Dun Gang Gu, Min Sheng Huang, Li Chen, Qin Chao Huang, Min Tong, Yan He
Enrichment factors (EF) indicated that the order of pollution level was as follows: Cd>Cu>Zn>Ni>Cr>Pb.
TOC is an important factor when analyzing the source and distribution of metals [17], so we also calculated the correlation factors between TOC and metals (Table 4).
(2) Enrichment factors were calculated to assess the sediment quality.
Blaha, Change of magnetic properties due to fluctuations of hydrocarbon contaminated groundwater in unconsolidated sediments, Environ.Pollut. 158(2010) 1756-1762
Cabrera, Horizontal and vertical variability of soil properties in a trace element contaminated area, Int.J.Appl.Earth.Obs,10 (2008) 11–25
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