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Online since: July 2021
Authors: Ismail Bey Sefedin, Elmar Yagyaev
A full factorial experiment was carried out with varying factors at two levels.
Laser radiation is a universal tool of thermal action and allows cutting and engraving materials of various physical properties.
To study the process of laser profiling of a grinding wheel on a ceramic bond, we select a grinding wheel (125 × 20 × 32 25A 60L 6V 50) and highlight two main factors affecting the processing parameters: radiation power – P and processing speed – V.
Values of levels and intervals of variation of factors.
D., Sefedin Application of the method of planning an experiment to study some factors affecting the depth of cut in laser cutting, Scientific Notes of the Crimean Engineering Pedagogical University, No. 2 (64) (2019) 267-270
Online since: May 2004
Authors: A. Bellosi, Cesare Melandri, Stefano Guicciardi, Diletta Sciti
Processing and Properties of Novel Electroconductive Ceramic Composites D.Sciti, S.
The results obtained show that these materials are good electrical conductors but the improvement of mechanical properties compared to the matrix is affected by the characteristics of the added phase.
Depending on local chemical factors, different phases either crystallized from liquid during cooling down from sintering temperatures or formed glassy phases.
Mechanical properties The properties of the composites, reassumed in Table 2, are compared to those of the AlN-SiC matrix.
The addition of either MoSi2 or ZrB2 results in an improvement of mechanical properties compared to the insulating matrix.
Online since: June 2014
Authors: Wen Tong Cheng, Li Juan Bai, Ming Yin, Lan Lan Guo
NC machine creeping failure usually occurs in the mechanical part and feed servo system of NC machine tool feed system, because of low speed creeping phenomenon often depends on the characteristics of mechanical transmission parts.
The influencing factors of crawling (1) Crawling is associated with the properties of friction.
Among the mechanical transmission system, the stiffness of the whole system will be affected because of deformations of any transmission part, especially the last set of transmission part.
The main measures to prevent the crawling All the influencing factors of crawling, the difference between the static and dynamic friction force of the moving parts and rigidity of transmission system, are the two main factors .There are some measures to prevent crawling: 1.
Usually drive the equivalent damping coefficient of c1 is very small, the crawling phenomenon of theoretical analysis and numerical simulation can be seen: whether the creeping phenomenon depend mainly on the friction properties of the friction damping coefficient c2 , c2 >0 will not crawl phenomenon, while c2 <0 can produce creeping phenomenon
Online since: January 2013
Authors: Qing Shan Li, Mei Zhang, Lin Li, Chao Bin Huang, Ru Yi Wu, Ren Yu Fu, Ping Fang
Mechanical properties and impact toughness of butt joint, the welding crack susceptibility of weld and heat-affected-zone (HAZ) for tee joint, Control Thermal Severity (CTS) welded joint, and 60°Y-groove butt joint were inspected after gas shielded arc welding tests.
The mechanical properties of the electrode wire are, YS 435MPa, UTS 550MPa and TE 29%.
Mechanical properties of welded joint.
Results and discussion Mechanical properties of the welds.
Fig. 1 Mechanical properties and hardness profile of welded joint Impact toughness of (a) RT; (b) -20℃; and (c) Hardness profile.
Online since: August 2011
Authors: Guang Nan Chen, Xue Jun Chen
Some other parameters affecting TSIF, such as segmentation crack depth and convection severity, were also discussed.
Introduction Protective coatings have been widely used in thermal environments to improve certain surface properties of the substrate, e.g., thermal, corrosion and wear resistance.
The transient thermal stress intensity factors (TSIFs) were evaluated using finite element method.
The main dimensionless data concerning material properties and geometrical parameters in our calculations are tabulated in Table 1.
In terms of the differences in thermo-physical properties of coating and substrate, circumferential stress discontinues at the interface as expected.
Online since: February 2013
Authors: Ludosław Stobierski, Gabriela Górny, Paweł Rutkowski, Marian Rączka
The computer-aided analysis of microstructure of the SiC-TiB2 composites and the analysis of the measurement results of mechanical properties of those composites prove that their microstructure and properties depend on the volumetric content of TiB2 in a dispersed phase, and this dependence is significant.
SiC-based composites have the properties such as high hardness, wear resistance, and good chemical inertness; therefore, those composites constitute an alternative suitable for mechanical and tribological applications.
The elastic properties of the composites were measured using ultrasonic methods.
The mechanical properties of composites are shown in Table 2.
Kristic, Microstructure-mechanical properties relations in SiC-TiB2 composite.
Online since: May 2012
Authors: Jian Gang Qiao, Jue Jie Li, Ya Qiong Wang
The mechanical properties analysis of rutting resistance road based on ANSYS Junjie Li 1, a, Yaqiong Wang 2,b and Jiangang Qiao3,c 1 Langfang Highway Engineering Department, Langfang 065000, China 2 College of Civil Engineering, Hebei University of Technology, Tianjin 300401, China 3 College of Civil Engineering, Hebei University of Technology, Tianjin 300401, China aqiaojg369@126.com, bjanelovejay@126.com, cqiaojg369@126.com Keywords: asphalt pavement; shear stress; finite element method Abstract.
Based on the constitutive model of asphalt mixture, the paper analyzes mechanical properties of modulus, shear force and peak deflection value for different asphalt surface course after adding the rutting agent using the finite element method.
Finite Element Modeling The paper analyzes multi-layer pavement structure, assumes the material has linear elastic properties and uses the finite element analysis software ANSYS 9.0 to model.
The underside of base (subbase) is generally tensile stress which is affected by the relative stiffness and thickness of base.
Summary Based on constitutive model of visco-elastic asphalt mixture, the paper analyzes the surface layer mechanical properties after adding Ranspunrie under the standard axial loading using ANSYS software.
Online since: September 2014
Authors: Hai Xia Zhang, Jia Wei Pei, Lu Yuan He
In essence, the bond mechanism between FRP and concrete is stuck outside fiber reinforcement is much more complicated, the bond performance is affected by the types of FRP material, slot filling material and performance, slot size, clear distance between slots and the distance from slot to the edge of the concrete, concrete strength grade and other factors.
These factors are related to the economy of strengthening design and the reliability of the reinforcement effect.
Influencing Factors Failure Modes FRP bars embedded in reinforced concrete rectangular beam which considers secondary loading have bending failure modes[15] 1.
Among them, the failure mode 1 and form 4 belong to brittle failure, in the design, to avoid by controlling the FRP bar maximum and minimum amount of reinforcement; failure form 5 has nothing to do with structure design, the formation of mainly depends on bonding properties of colloid and the selection of construction methods.
The mechanical behavior of NSM FRP bars strengthened beams is affected by the initial load, FRP bars strengthening quantity, embedded length of FRP bars, the reinforcement ratio and other factors. 3.
Online since: February 2011
Authors: Shi Jin Zhang, Yu Qiang Wu, Yan Li Wang
Although unalloyed titanium is soft and does not exhibit a notably high strength, its alloys, such as Ti-6Al-4V (chemical composition shown in Table 1) demonstrate remarkable mechanical properties, including high strength-to-weight ratios, low densities, excellent corrosion resistance, excellent erosion resistance and low modulus of elasticity (shown in Table 2).
Theoretically, cutting speed is a major factor which affects surface roughness.
Seems material thickness is a major factor which affects surface roughness.
Except that, orifice diameter to mixing tube diameter ratio has been fixed as 1/3 which has been verified by a lot of experiments and has been accepted extensively in abrasive water jet field, therefore, in order to simplify modeling process, there is no need to consider orifice diameter and mixing tube diameter as major affecting factors at the same time.
As showed above, water pressure, quality level index, nozzle combination and target material thickness are factors which affect surface roughness on both top side and bottom side
Online since: August 2006
Authors: Yong Chae Chung, Sang Pil Kim, Sang Won Seo, Chong Min Kim, Deok Soo Kim
The structural configurations of atom constituting materials are one of the fundamental factors in the study of physical properties of materials.
Introduction Techniques to understand and control microscopic systems are important because they provide ways to control material properties.
The following are important geometric factors affecting the material properties: While pores, dislocations, cracks, and grain boundaries affect the material properties on a micro-scale, the arrangement of atoms, order of stacks, and lattice mismatches have influences on a nano scale.
Moreover, there are important applications based on geometric properties for spatial problems.
In addition, the grain boundaries and properties of a material can be also analyzed under the different circumstances such as temperatures, stresses, and shock waves.
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