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Online since: December 2013
Authors: Mohd Bin Sulaiman Hafis, Mohd Jamir Mohd Ridzuan, S.M. Shahril, K. Azduwin, A.R. Mohamed, S.N. Fitriah
For the study of surface roughness, the wear and surface damage also affect surface roughness where both of them are also affected by another factor which is localization of heat influenced by thermal conductivity of material [12].
Table 1: Properties of SKD11 [3] Chemical composition for SKD11 (mass%) Element C Si Mn Cr Mo V S P Specification 1.55 0.3 0.35 11.75 0.75 0.95 0.005 0.02 Table 2: Properties of aluminum A1100 [3] Chemical composition for aluminum A1100 (mass%) Element Si Fe Mg Cu Ti Zn Al Specification 0.3 0.33 0.0016 0.054 0.013 0.013 99.00 (Min) Table 3: Viscosity of lubricants Parameter EFB (fresh) Palm Olein Daphne Draw S Series Viscosity at temperature 30°C (mPas) 2.6137 45 115 Workpiece was placed between taper dies in the extrusion rig.
The different of taper die angles could be affecting to the rough surface on the extruded product.
EFB with low viscosity mixed with the moisture content do not resist the effect of friction force as well as the DDS performs in the mechanical contact.
International Journal of Mechanical Sciences 53, p. 549-555
Online since: April 2012
Authors: Fu Gang Yan, Yi Wen Wang, Xian Li Liu, Ke Qiang Li, Wei Ji
Design of PCD drill Geometry Angles Material and edge types of PCD were factors that affected CFRP hole quality.
The two factors affected hole quality deeply.
Experimental material used was CFRP whose properties are given in Table. 1.
Table 1 Mechanical properties of multidirectional CFRP Item Reinforcement material Matrix material fiber orientation Volume rate of carbon fiber Thickness Parameter T300 AG-80 epoxide resin (±45°/0°/90°/0°)s 60±5% 5 mm Cutting tools were PCD drills with straight flutes.
For axial load and hole exit quality, cutting edge types, clearance angle and second point angle were primary factors, and first point angle was secondary.
Online since: February 2011
Authors: Li Da Zhu, Wan Shan Wang, Hai Feng Zhao, Ming Liang Zhang
Deformation and vibration will be emerged by support load and dynamic transmission process in Gear system of tunnel boring machine, which directly affect motion stability.
Material property is added to part.
The simulation is executed in Figure 2(b), which includes the information of the flexible body, such as mass, center of mass, moment of inertia, frequency, mode shapes and participation factors.
Angle velocity and angle acceleration of gears and forces between gears and shafts can get from simulation curves, which can improve mechanical dynamic property and key part and components design.
ADAMS Virtual prototype technology introduce and improvement[M],Beijing: Mechanical Industry Press
Online since: November 2013
Authors: V. Zviadauri, T. Nadiradze, M. Chelidze, G. Tumanishvili
Introduction Many factors have influence on the working process of the vibratory transportation and technologic machine among which can be marked out: a) errors of manufacturing and assemblage of the vibratory machine component parts; b) nonworking spatial vibrations generated as a result of manufacturing and assemblage; c) rigidity of the working member; d) properties of the load under processing; e) characteristics of the vibro-drive; f) vibration parameters of the working member.
Research into influence of the mentioned factors on the working processes of the vibratory transportation and technologic machine traditionally envisages model and physical experiments.
The Possible Constructional Errors The elastic units and elements connected to them play an important role in the mechanical systems of vibro-machines [1].
Even deviations in the limits of tolerances cause nonworking vibrations at high amplitudes of vibration, which affect the quality of the technologic processes [3, 4].
The next factor affecting the working process is inaccuracy of transmission of the exciting force on the working member.
Online since: July 2013
Authors: Claus Peter Fritzen, Inka Buethe
It is in need of the sensor configuration data and information about its intact boundary conditions, but the necessary information regarding the structure is limited to its thickness and material properties.
It is assumed, that the degradation of the material only affects this physical parameter.
As it is an axisymmetric model, breakage is modeled by reducing the PWAS surface area via a factor.
Krueger, „Properties of Piezoelectricity, Technical Publication TP-226,“ 2000. [14] V.
Hooker, „Properties of PZT-Based Piezoelectric Ceramics Between -150 and 250 °C,“ 1998. [17] D.
Online since: April 2012
Authors: Geok Soon Hong, Jerry Y.H. Fuh, Yoke San Wong, Eng San Thian, Ee Jen Wang, Jie Sun, Lei Chang, Jin Lan Li
However, the hydrophilicity of collagen can lead to faster degradation, and its mechanical properties are also relatively low in comparison to bone [12].
The ductile properties of collagen can help to increase the poor fracture toughness of HA; the addition of HA to collagen can also provide higher stability, increase the resistance to three-dimensional swelling and enhance its mechanical ‘wet’ properties [12].
Hence, such composite coating can not only induce a continuous transition from tissue to implant surface but also enhance early and stronger fixation of the bone-substituting implant as well as provide better mechanical and biological properties.
Depending on the fluid properties of dispensing materials and requirements for specific applications, various micro-dispensers are selected by different researchers.
Prior to the HA/Col structure fabrication, the effects of four dispensing parameters were investigated due to the differences of fluid properties of HA suspension and collagen solution.
Online since: August 2013
Authors: Ying Liu, Peng Peng
Then, it focuses on experimental investigation on new and old concrete bonding shear performance, and verification of bonding properties of interface agent.
Such damages of bridge deck pavement as overall exfoliation, decrustation, crack and spallation are closely related to poorer binding material properties.
Cleaning and leveling principle for these parts is rather deep than shallow and rather square than round. 4.2 Beam Top Cleanness Before conducting deck pavement, deck slab surface cleanliness is an important factor affecting the bonding strength between lower surface of bridge deck pavement and deck slab surface.
(2) New and old concrete interfacial bond shear strength all are much lower than the strength of overall shaping concrete, greatly affecting shear performance of the structure.
Experimental Investigation on Mechanical Properties of Concrete Bridge Deck Pavement System [J].
Online since: December 2014
Authors: António Santos Silva, Said Jalali, Luis Mayor Gonzalez
Main factors affecting the reaction rate are alkalinity, content of reactive minerals, humidity, temperature and the presence of calcium ions.
The ASR reactivity of aggregates is often measured by linear expansion of mortar bars or concrete prisms, but many other material properties, inherent or affected by the reaction, are reported [11-14].
The relevant varying conditions are assumed as the main factors known to affect ASR (all other factors were neglected as they are kept constant or have lesser effects).
It results from the varying size or other unaccounted sub-factors in the nature and properties of the aggregates, shape or size of the specimens.
If results are positive, extend to tests based on different properties.
Online since: January 2013
Authors: Xi Jun Liu, Ming Jue Li, Ying Yan Diao
The particle size of core-shell latex and the St conversion of shell monomer were affected by emulsifier, initiator, pH and temperature etc.
The seeded emulsion polymerization gradually becomes the most widely-used way to prepare core-shell polymer nanoparticles, because we can obtain composite particles with different morphologies and properties using it [1].
The core-shell nanoparticles have come to be used in a wide variety of polymer enforcement: they can evidently increase the polymer’s wearability, abrasion resistance, anti-water property, weather fastness, UV-resistance, tensile strength, impact strength and interfacial interaction, improve the transparency, decrease the minimum film-forming temperatures(MFTs) and improve the processability[2].
The impacted factors of core-shell monomer percent conversion and the core-shell of particle size affected by emulsifier were studied.
The reactor was consisted of mechanical stirrer, reflux condenser, thermometer and the inlet of nitrogen.
Online since: August 2010
Authors: Hasim Pihtili, Ibrahim Kocabas, Sukru Cetinkaya
Effects of Temperature and Load on Wear for Different Matrix And Fibre-Reinforced Composite Materials Hasim Pihtili1,a, Ibrahim Kocabas2,b, Sukru Cetinkaya3,c 1 Firat University Mechanical Engineering Department Elazig,Turkey 2 Firat University Mechanical Engineering Department Elazig,Turkey 3 Dicle University Mechanical Engineering Department Diyarbakir,Turkey a hpihtili@firat.edu.tr, bibrahimkocabas@firat.edu.tr, cscetinkaya@dicle.edu.tr Keywords: Wear, Glass fibers, Woven fabric polyester resin, Epoxy resin, Composite materials Abstract: In this study, wear behaviours of fiber-reinforced and matrix composite materials are experimentally investigated under different speeds, loads and temperature.
Introduction Industrial materials working in places where wear properties are desired to be wear resistant.
However, the behaviour is affected by factors such as the type, amount, size, shape and orientation of the fibres, the matrix composition and the test conditions such as load, speed and temperature [2, 3, 4].
Gadelrap, "Friction and wear properties of E-glass fiber reinforced epoksi composites under different sliding contact conditions", Wear 192, 1996; 112-117.
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