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Online since: September 2019
Authors: Shao Yan Wang, Yun Jie Ma, Qian Li, Wei Zhang
Re and Rg1 have similar physicochemical properties, but their molecular structures are different.
Results and Discussion Physical properties of MIPs.
Physical morphology and adsorption properties of MIPs can be consulted on Figure 1.
There is a slight effect of Rg1 pre-adsorbed on the MIPs for the adsorption of Re and the initial concentration of template is the main factor affecting the adsorption capacity of competing molecules at the same temperature.
UV irradiation and aging effects on nanoscale mechanical properties of ultra high molecular weight polyethylene for biomedical implants, Plastics Rubber and Composites. 37(2008) 346-352
Online since: February 2012
Authors: Lian Tie Wang, Qing Shan Meng, Da Wei Xia, Xin Ming Wang
Introduction The more progress of the society and the development of science and technology, the more widely of electricity used, and then also produced many unsafe factors.
However, the number of solar energy water heater fire more and more, the cause of casualties and property losses increased year after year.
There are many factors which affects the form of the melted mark,the structure which formed in the fire is different possibly,especially the appliance to the electrical melted mark is more complex,therefore,the further research is needed for appling in the actual fire scene.
[6] Quankun Liu:Material Molding Basic Principle(Mechanical Industry Press,Beijing 2005).
Online since: March 2007
Authors: Fumiyoshi Minami, Anna Ui, Mitsuru Ohata
It was found that the strength heterogeneity between crystal grains with different phases could affect ductile cracking behavior through difference in stress/strain localization behaviors.
Table 1 shows the chemical composition of the steel, and Table 2 lists its mechanical properties.
Chemical composition (%) C Si Mn P S Cu Ni Cr Mo V B Ceq 0.17 0.33 1.37 0.018 0.018 0.01 0.07 0.06 0.008 0.002 0.0001 0.43 Ceq=C+Mn/6+Si/24+Ni/40+Cr/5+Mo/4+V/14 Mechanical properties El. (%) 31 HV Ferrite Pearlite 198 276 σY (MPa) σT (MPa) YR (%) εT (%) 344 540 64 17.6 σY : Lower yield stress, σT : Tensile strength, YR : σY /σT, εT : Uniform elongation, El. : Elongation (G.L.=36mm, Dia.=6mm) , HV : Average Vickers hardness (Load : 25g) Fig. 1 Microstructures of SM490YB (Ferrite-Pearlite) steel used.
Table 2 Mechanical properties of steel used.
The proposed method may also be useful in studying the effects of morphology of heterogeneous microstructure as well as stress triaxiality on the ductile cracking properties of the two-phase steels.
Online since: June 2007
Authors: Guo Dong Wang, Zheng Yi Jiang, Xiao Ming Zhang, L.M. Yang, Xianghua Liu
China 2 School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong, Wollongong NSW 2522, Australia a zhang_xiaoming@263.net, bjiang@uow.edu.au, cly356@uow.edu.au, dliuxh@mail.neu.edu.cn, e wanggd@mail.neu.edu.cn Keywords: Twin-roll strip casting, Flow, Temperature, Outlet angle, Submerged nozzle depth.
In twin-roll strip casting process, metal flow and temperature distribution in the molten pool directly affect the stability of the process and the quality of products.
But the protective slag cannot keep warm in twin-roll strip casting, the submerged nozzle depth is a very important factor.
Stainless steel was selected as the casting material and the relevant properties of stainless steel were mentioned in reference [16].
Online since: August 2013
Authors: Baris Sayin, Erdem Damcı
However, fire resistance of CFRP is a primary factor limiting the widespread application of the composites in building applications.
At elevated temperatures, the properties of FRP deteriorate, resulting in rapid loss of strength and stiffness above glass transition temperature, Tg [4].
Because of the reduction in force transfer between fibers and the resin, the mechanical properties of the FRP reinforcements would be reduced.
Based on the results obtained from validated model, a number of recommendations for future research and application purposes are listed below: · The material properties of the insulation material, such as density, specific heat and thermal conductivity, directly affects temperature variation of RC beam element and thereby its collapse time.
For this reason, insulation materials with different material properties should be taken into consideration in the numerical and experimental studies and their effectiveness must be examined
Online since: February 2015
Authors: Sharifah Bee Abd Hamid, Yun Tan Xiao, Wei Lai Chin
Nanocellulose (NCC), also known as nanocrystalline cellulose is the cellulose with diameter in 1-100nm range and tens to hundreds of nanometers in length with relatively high aspect ratio (~70) and highly crystalline structure properties [3].
NCC has became increasingly popular for the past decade because of its unique properties such as low density, high tensile strength (~300GPa), high Young’s modulus (~150GPa), modifiable surface properties, biodegradability, biocompatible as well as great availability from renewable resources [4-7].
Thus, FTIR spectra confirmed that heat treatment with ionic liquid to the cellulose did not affect or change the chemical compositions of the cellulose significantly [6].
Hsieh, Preparation and properties of cellulose nanocrystals: Rods, spheres, and network, Carbohydrate Polymers. 82 (2010) 329-336
Voronova, et al., The effect of drying technique of nanocellulose dispersions on properties of dried materials, Materials letters. 68 (2012) 164-167
Online since: June 2025
Authors: Marcel Kohutiar, Michal Krbat'a, Silvia Ďurišová, Iveta Papučová, Petra Skalková, Simona Lokšíková, Oľga Novosádová, Katarína Moricová, Róbert Janík
Furthermore, plasma treatments were applied to thermoplastics like PP and PVC to evaluate changes in their surface properties [6].
Increasing surface energy is critical for improving adhesion properties, particularly for applications that involve coating or bonding processes [13].
The study evaluates how variations in treatment parameters such as voltage, exposure time, and airflow rate affect the surface properties of both materials.
Dobrovská, Modification process of selected thermoplastics with cold plasma and evaluation of changes in their properties, Mater.
Kovácik, Effect of DCSBD plasma treatment on surface properties of thermally modified wood, Surf.
Online since: January 2013
Authors: Emmanuel Iwuoha, Chinwe O. Ikpo, Njagi Njomo, Kenneth I. Ozoemena, Tesfaye Waryo, Rasaq A. Olowu, Milua Masikini, Abd Almonam Baleg, Nazeem Jahed, Priscilla G.L. Baker
FeCo nanoparticles are important soft magnetic materials with a variety of structural [18-20], electronic [21-22], mechanical [23-24], optical [21] and electro-catalytic properties [25].
Rodriguez, Physical and chemical properties of bimetallic surfaces, Surf.
Greneche, Structural properties of Fe50Co50 nanostructured powder prepared by mechanical alloying, J.
Dinhut, Mechanical and magnetic properties of nanocrystalline FeCo alloys produced by mechanical alloying, Nanostruct.
Sourmail, Near equiatomic FeCo alloys: constitution, mechanical and magnetic properties, Prog.
Online since: December 2019
Authors: Masayuki Arai, Kiyohiro Ito
Prediction of Indentation Size Formed by a High-Velocity Impingement of a Solid Sphere Based on an Expanding Cavity Model Kiyohiro Ito1,a and Masayuki Arai1,b 1Department of Mechanical Engineering, Faculty of Engineering, Tokyo University of Science, 6-3-1, Niijyuku, Katsushika-ku, Tokyo, 125-8585, JAPAN akiyohiro@rs.tus.ac.jp, bmarai@rs.tus.ac.jp Keywords: Expanding cavity model, High-velocity impingement, Johnson–Cook constitutive equation, Indentation, Finite element analysis.
In a high-velocity impingement phenomena such FOD, the plastic deformation behavior of the impinged material is affected not only by work hardening, but also by strain rate hardening and thermal softening.
The increase in temperature ∆T is given as ∆T=T-Tref=k2Upcptρt , (8) where cpt and ρt are the specific heat and density of the target. k2 is the conversion factor from plastic strain energy Up to heat energy.
In this study, this factor is assumed to be 0.9, which means that 90% of Up is adiabatically converted into heat energy.
These material properties and the analysis conditions were cited from literatures [7]-[9].
Online since: July 2013
Authors: Fa Jun Zhang, Chang Zhou, Zhong Liu, Yi Lei
Research on a Control Strategy of Anneal Stove in Continuous Casting Machine with Fuzzy Self- tuning PID Control Fa-jun Zhang1, 2, Zhong Liu1, Chang Zhou1, Yi Lei1 1College of Mechanical & Material Engineering of China Three Gorges University 2Hubei key Laboratory of Hydroelectric Machinery Design & Maintenance 1 doctorzfj@126.com, 2 dtzfj@ctgu.edu.cn Keywords: anneal stove; fuzzy control; PID; self-tuning Abstract: In allusion to temperature hard to control for parameters parameter being variable and nonlinearity in the process of annealing furnace.
Refined organization, reduce hardness, improve cutting machining properties, eliminate inside stress could get through the annealing technology.
The anneal stove is the main equipment in the steel rolling enterprise, directly affects the quality, yield and cost.
The fuzzy self-tuning PID control could detect and analyze the factors of uncertain conditions, parameters, delay and disturbance.
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