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Online since: August 2012
Authors: Chao Wu Zhang, Chang Tao Liu, Ling Xiao, Fen Wang, Cong Yue Duan
Introduction Bone tissue defect and breakage owing to disease, senescence or accident are all long very difficult problem affecting human health.
The influencing factors during processing were illustrated and the configuration of final product was characterized.
At the first, put the A suspending liquid in the ultrasound generator and add slowly a difinite quantity of B solution into A with mechanical stirring and ultrasound application, keeping reaction temperature of 40°C~55°C and pH=10.5~11.5.
Ultrasonic Co-deposit Fabrication of Si-HA Nanopowder and Mechanical Property of Its Bio-cement, J.
Online since: February 2014
Authors: Salwa Mahmood, Nor Hazrina Jamil, Muhamad Zameri Mat Saman, Mohd Yusof Noordin
Membranes characterized by flux and selectivity properties that provide functional transport across the barrier.
Solvent choice can affect membrane porosity and will influence membrane performance level [8].
In order to calculate the fuzzy sets for each sub elements, target range for each factor have to be defined.
As an example, triangular fuzzy sets for halocarbons is from target range of molar mixing ratios (part per trillion, ppt 10-12) influencing factor for global warming.
As for economic score, costs are having worst effect compared to technology and process influencing factors.
Online since: January 2011
Authors: Shahrum Abdullah, N. Nik Abdullah, M. Hadi Hafezi
Abdullah c Universiti Kebangsaan Malaysia, Department of Mechanical and Material Engineering, Bangi 43600, Selangor, Malaysia aenikkei@eng.ukm.my, b hafezi@ukm.eng.my, c shahrum@vlsi.eng.ukm.my Keywords: UniGrow model, Load interaction effects, Spectrum loading Abstract.
The main problem was the lack of information about various phenomena that can affect variable amplitude fatigue crack growth and interaction between them.
He also mentioned retardation after overload application, which was influenced by several factors, e.g. the overload ratio, baseline-level loading, number of overloads or the fraction of mixed mode.
It is noted that the calculation of the crack opening stress intensity factor in the case of variable amplitude loading is not easy [25].
The choice of model for a given situation may be governed by knowledge of the loading conditions, material properties and background research of the situation.
Online since: July 2025
Authors: Kiki Dewi Lestari, Sri Indah Lestari, Lidia Gusfi Marni, Suhendra Suhendra, Aini Qomariah Manurung, Syukrya Ningsih
The term "microplastics" refers to a wide variety of particle characteristics, including chemical and physical properties [5].
Plastic waste in the environment tends to break down into smaller particles due to mechanical abrasion and biodegradation.
The morphological properties and composition of an element were analyzed using SEM-EDS.
According to our findings, road dust and soil are an important factor to consider when measuring the state of pollution in numerous elements of our environment.
Harrison, Sources and properties of non-exhaust particulate matter from road traffic: A review, Sci.
Online since: April 2011
Authors: Domenico Umbrello, Yan Cheng Zhang, Tarek Mabrouki, Daniel Nelias, Ya Dong Gong, Stefania Rizzuti
This paper is composed of three main parts: First, some aspects concerning the material properties are briefly discussed.
Components for these applications have precise requirements on mechanical and physical properties [9].
The chemical composition and the key physical and mechanical properties of Ti-6AL-4V are listed in Table 1 and plotted in Fig. 1.
Such evidence justifies the assumption to neglected phase transformation model in the material thermal, mechanical and physical properties in both the software.
Yen: Modeling of metal cutting and ball burnishing – Prediction of tool wear and surface properties, PhD Dissertation, Ohio State University (2004) [20] D.
Online since: December 2025
Authors: Yun Hao Geng, Jun Yu, Xiao Wei Feng
Since the proposal of this new hybrid column, Teng and many other researchers have conducted a series of experimental and finite element simulation studies, leading to comprehensive understandings of its static and seismic performance[2-15]: (1) The filled concrete is effectively confined by the presence of the FRP tube and the steel tube, while the buckling of the steel tube is delayed or restrained by the concrete in turn, thereby significantly enhancing the ductility of DSTCs. (2) The slenderness ratio, FRP tube thickness, steel tube thickness, hollowness ratio, and fiber orientation angle within FRP tube are key factors influencing the axial compression behavior and failure modes of DSTCs. (3) In addition to the aforementioned factors, the axial compression ratio, types of FRP, and loading method also play critical roles in determining the seismic performance of DSTCs.
The electronic detonators were placed on the end of the cylindrical charges farther from the specimens for detonation. 2.2 Material Properties.
The GFRP tube turned roughened and blackened in the area directly facing the charge, while circumferential cracks formed in other regions, suggesting that the columns were also affected by the detonation products besides the shock waves
Standard for Test Methods of Mechanical Properties of Ordinary Concrete.
Online since: October 2004
Authors: Xia Ting Feng, Jian Liu, Zong Liang Ru, An Nan Jiang
Feedback Analyses of Initial Ground Stress Field and Rock Mechanics Parameters Initial stress field and rock mechanics parameters directly affect the stress distribution, deformation evolution of the surrounding rock masses after excavation, and they are the important factors that must be considered in the design and optimization of support systems.
Generally, there are many uncertain factors before excavation, so the real-time feedback of the results to the next construction steps is very necessary.
The comparison of the numerical results and the in-situ monitor data demonstrated that the group of high physical properties agrees with the realistic rock mass parameters, which is shown in Table 1.The comparison between resulted from numerical modeling and in-situ monitoring accumulative displacements of some cross-sections at the third construction step is shown in Table 2.
Mechanical parameters of surrounding rock mass resulted from the feedback analyses Density Deformation Poisson's Friction Cohesion Tensile Strata (kN/m 3 ) Modulus(GPa) ratio Angle (°) (MPa) Strength(MPa) P1q4 26 20.0 0.25 45 1.2 1.5 P1q3 26 8.0 0.35 38 0.8 1.0 P1q2 26 20.0 0.25 45 1.2 1.5 P1q1 26 8.0 0.35 38 0.8 1.0 P1ma 20 0.8 0.40 30 0.4 0.7 C2h 26 18.0 0.28 52 1.2 1.5 Concrete 25 26.0 0.167 45 1.5 2.0 Table 2 The comparison between resulted from numerical modeling and in situ monitoring accumulative displacements of some cross-sections at the third construction step((((Unit::::mm)))) No.1Set No.2 Set No.3 Set No.4 Set Monitoring data of settlement displacements of arc top -2.0 -2.2 -2.9 -4.5 Numerical result of settlement displacements of arc top -2.435 -2.583 -2.762 -3.575 Monitoring data of convergent displacements of arc shoulder -3.0 -2.1 -3.0 -4.1 Numerical result of convergent displacements of arc shoulder -2.269 -1.846 -1.9 -5.19
The high physical properties adopted by the numerical model also agree with the factual rock mass.
Online since: April 2015
Authors: Cheol Woo Park, Jong Hwan Yoon, Moon Kyu Kwak, Kyung Won Kim, Woo Hyeong Lee, Jae Heon Lee
Visualized Flow Structure inside an Odor-Removing Basin System with Multi-Stacked Porous Baffles Woo Hyeong Lee1,a, Kyung Won Kim1,b, Jae Heon Lee1,c, Jong Hwan Yoon2,d, Moon Kyu Kwak1,e and Cheol Woo Park1,f* 1School of Mechanical Engineering, Kyungpook National University, 1370 Sankyuk-Dong, Buk-Gu, Daegu, 702-701, Korea 2Division of Automotive, Industrial and Mechanical Engineering, Daegu University, 201 Daegudae-Ro, Gyeongsan, 712-714, Korea aleewh0710@naver.com, bnarci0330@naver.com, cjheone@gmail.com, djhyoon@daegu.ac.kr, emkkwak@knu.ac.kr, fchwoopark@knu.ac.kr Keywords: Baffle, Odor removing, Visualization, Bubbly flow, Momentum Abstract.
The process was accomplished after setting a stabilized flow, and the FOV was set at 120 mm × 90 mm to accurately analyze the flow properties.
This result suggests that baffle number is an important factor in the bubbly flow mixing such that increasing baffle number enlarges bubble size.
The experimental results indicate that turbulence is dominant near the rotating disk drum and surface of baffles and that baffle number affects the bubbly flow inside the water basin.
Online since: June 2013
Authors: Qing Tan, Zhen Huan Zhu, Yi Min Xia, Lv Jian Xie, Xin Jian Sun, Bin Hua Li
Numerical Modeling of The TBM Disc Cutter’s Kinematic Behavior During Its Wear Process and Experimental Verification Qing Tan1,2,a,Zhenhuan Zhu2,b,Yimin Xia 1,2,c*,Lvjian Xie2,d,Xinjian Sun2,e, Binhua Li2,f 1 State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410012, China 2 College of Mechanical and Electrical Engineering, Central South University, Changsha 410012,China E-mail: ajds-share@163.com, bzhenhuan.zhu@gmail.com, cxiaymj@csu.edu.cn, d865420196@qq.com, e168002764@qq.com, f281176661 @qq.com Keywords: Disc cutter, Kinematic behavior, Numerical simulation, Wear, Experimental verification.
The disc cutter’s kinematic behavior is an important factor of rock breaking process and cutter’s wear process.
The wear of disc cutter will change its cutter tip shape, thus affect the cutting behavior [6], which, in turn, make the cutter’s cutting process more complex.
Its mechanical properties are listed as follows: the uniaxial compressive strength is 58~64MPa, the tensile strength is 4~6MPa, the cohesion is 1.15MPa, the internal friction angle is 43.5˚, the poison's ratio is 0.3 and the elastic modulus is 7.5GPa.
Online since: August 2009
Authors: Jui Chang Lin, King Sun Lee
The Study of Flowing Balance with Multi-Cavity Die and Non-Uniform Thickness Jui-Chang Lin1 ,King-Sun Lee2 1 Department of Mechanical Design Engineering, National Formosa University, Huwei , Taiwan 632, R.O.C.; email: linrc@nfu.edu.tw 2 Department of Mechanical Engineering, Chien Kuo Technology University, Changhua, Taiwan 500, R.O.C.; email:kingsun@ctu.edu.tw Keywords: Gate, Die casting; Zn-Alloy; Flow 3D; Air trap Abstract.
The basic theorem was built on three equations of fluid mechanics as follows: Energy conservation t f L zT yT xT k z T u y T v x T u t T C s p ∂ ∂ +      ∂ ∂ + ∂ ∂ + ∂ ∂ =       ∂ ∂ + ∂ ∂ + ∂ ∂ + ∂ ∂ ρ ρ 2 2 2 2 2 2 Where ρ :density; t :time; u , v , w :velocity of x , y , z direction; p :pressure; T :temperature; υ:viscosity; k :Thermal conductivity; g :gravity acceleration; pC :specific heat; sf :solid phase factor; L : latent heat.
In Fig.7 showed the thickness was variable which did not affect the flow in the middle of the part.
The internal texture of casting part contained minimum of pores and multi-cavities with same mechanic properties.
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