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Online since: July 2023
Authors: Rassim Younes, Mohand Amokrane Bradai, Youcef Mouadji, Houcine Touati
Sprayed Alumina (Al2O3) coatings have the potential for improving the mechanical properties depending on the enhancements of physical properties resulting from the microstructure characteristics [9-11].
The data cover a wide range of parameters, including mechanical and thermo-physical properties, and similar and dissimilar ceramics contacts.
It affects the coating morphology and the mechanical properties of the coating (see fig 5). 4.
These factors include the experimental friction coefficient, contact pressure, sliding velocity, and material properties.
By considering multiple factors that can affect the temperature of contact, our model can help to optimize the thermal spray parameters and improve the performance of tribological systems. 4.
Online since: September 2007
Authors: Ming Tu Ma, Zhi Gang Li, Hao Zhang, Hong Liang Yi, Xiao Feng Xiang, Hong Wu Bai
China 2Department of Mechanical Engineering and Manufacturing, Zhangjiajie Institute of Aeronautical Engineering, Zhangjiajie 427000, P.R.
The proper materials used for the frame are one of the key factors to impact the performance of the motorcycle [1-3].
Fig.9(b) shows the metallograph of the heat-affected zones close to the cracks, where the crystal grains were much bigger than those in the matrix structure and the directivity of crystal grains was primarily eliminated.
Table 1 Comparison of the chemical compositions and mechanical properties of the initial and replacing steel materials C Mn Si S P σS σb δ Initial material Q195 0.06~0.12 0.25~0.5 ≤0.3 0.05 0.045 ≥195 315~390 ≥33% Replacing material 0.42~0.5 0.5~0.8 0.17~0.37 0.035 0.035 ≥345 ≥510 ≥28% Chemical compositions Mechanical properties Q345 The square tube of the frame with thickness of 2mm was easily over welded.
Table 1 compares the chemical compositions and mechanical properties between the initial material, the Q195 steel, and the replacing material, the Q195 steel.
Online since: November 2014
Authors: Dody Ariawan, Z.A. Mohd Ishak, R. Mat Taib, M.Z. Ahmad Thirmizir, Y.J. Phua
The heat treatment method changes the mechanical properties without affecting any changes in the structural and composition of the kenaf fiber [4, 5].
The modifications of kenaf fiber result in the changes of fiber properties such as surface roughness, elasticity, absorptive capacity, chemical composition, and mechanical properties.
RTM method exhibits the higher of mechanical properties than hand lay-up method [7] or compression molding method [8].
Flexural properties of composites.
However after 12.5 hours heating, the crystallinity index and the mechanical properties of kenaf fibers decreased.
Online since: April 2014
Authors: Lukáš Balík, Eva Burgetová, Kristina Fořtová
The paper deals with the influence of climatic factors on selected properties of remedial plaster.
A number of properties have been already tested and certified (WTA Guidelines).
It turns out that some of the properties of remedial plasters are influenced significantly by climatic factors.
The evaluation of water absorption by immersion and in a vacuum was carried out without drying between both tests, so the hydrophobic properties of the plasters were not affected by drying process. 2.
Acknowledgement The support of the grant project SGS13/009/OHK1/1T/11 “Experimental determination of physical and mechanical properties of selected building materials“ is gratefully acknowledged.
Online since: May 2020
Authors: Jia Rui Cheng, Sen Chen, Jing Jun Pan, Mei Jie Wang, Deng Ya Chen
Comparing and analyzing the corrosion law of tubing in distilled water and produced water, the results of column corrosion rate under hot steam injection and production conditions were obtained, which indicated the difference of corrosion and the influencing factors of tubing in two working conditions.
Therefore, the key point in studying tubing and casing corrosion is the effect of various factors on the corrosion reaction.
The corrosion properties of the mixed gas in the high temperature and high pressure environment may change during the process of injection and insulation especially for the thermal recovery well [4].
The composition and mechanical properties are shown in Table 1.
Hao, Factors affecting the corrosion behavior of tubular steel N80 in CO2 and H2S containing produced water of gas well, Materials Protec. 42 (2009) 59-62
Online since: October 2011
Authors: Majid Elyasi, Vahid Daiezadeh
It is found that springback is also sensitive to a range of material parameters, such as plastic anisotropy, evolution of elastic properties, yielding function and the Bauschinger effect particularly for loading/unloading operations.
Xu et al. [6] investigated the influence of some sensitive factors on the accuracy and efficiency of springback simulation.
Experimental Condition To characterize the material properties and anisotropy, different specimens from 25×100mm CK67 steel sheets were cut at different orientations to the rolling directions (0, 45, 90˚).
Tekiner, “An experimental study of the examination of springback of sheet metals with several thicknesses and properties in bending dies,” Journal of Materials Processing Technology, vol. 145, 2004, pp. 109-117
Feng, “Sensitive factors in springback simulation for sheet metal forming,” Journal of Materials Processing Technology, vol. 159, 2005, pp. 91-98
Online since: December 2012
Authors: Xiao Chuan Wang, Yong Kang, Xiao Feng Yang
We have analyzed and compared the expanding length and velocity of main fissure’s point and dynamic intensity factors between the holes of ordinary blasting and water-jet slotting; and discussed the dynamic effects of slotting blasting.
So optical properties of materials changes.
When a bunch of parallel beam vertically irradiates in materials, because of the crack tip causing changed optical properties through the test specimen in another side of light forms caustics spot,which can capture by high-speed photography instrument (Fig1).
Test specimens’ stress can reveal by contrast analysis of the focal speckle .Caustics line method is by measuring the change of the optical properties of solid materials appeared to intuitive distribution of stress in solid state.
Considering interference factors, conclusion can draw.
Online since: April 2011
Authors: Ji Ping Hao, Xian Lei Cao
Compared with the experimental results show that the elastic theory analytical solution overestimates the capacity of members, using experiment method can obtain more secure mechanical behavior of high-strength angle steel member with an eccentric load at one end.
At the eccentric end, mechanical properties and deformation is close to both ends of the eccentric compression, but for the axial end, mechanical properties and deformation process is relatively close to the axial compression Angles.
Compression bar of bearing capacity is affected by end constraints, initial eccentricity, initial bending, residual stress, and many other factors [5].
Conclusion The stability bearing capacity of single-angle compression member with a eccentric load at one end are studied by the analytical method, considering the experimental member boundary conditions issue, the analytical method can not accurately simulate conditions of end restraint, the initial defects and other factors, the resulting test value higher than the analytical value of 40% to 60%, also indicating that such member boundary conditions can not simply end restraint seen as hinged or fixed.
Analysis of mechanical behavior of members by experiment method is more reliable and safe than the analytical method.
Online since: March 2006
Authors: Jae Ho Jung, Soon Jong Yoon, S.K. You, Y.H. Kim, Seung Sik Lee
In a composite member, bond between steel and concrete is a crucial factor for the composite action.
Usually this bond behavior is achieved by installation of mechanical device so called shear connector.
On the other hand, the strength of shear connectors does not affect the stress resultants in the full composite section.
A total of 10 push-out test specimens is made, and the experimental result and properties of specimens are summarized in Table 1.
Based on the test results, the shape of shear connector is found to be an important factor that affecting the shear carrying capacity.
Online since: September 2011
Authors: Xiao Bin Chen, Jia Sheng Zhang
The tests discussion shows that stress conditions are the main factors, which affects the creep properties of granular soil.
The creep properties analysis shows the rheological model can describe the granular soil’s whole rheological phase well.
The tests results show that the stress conditions are the main factors to capture the characteristic features of creep behavior in granular materials.
Rheological properties of wet soils and clays under steady and oscillatory stresses, J.
Investigation on triaxial theologicalmechanical properties of green schist specimen II1:model analysis, J.
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