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Online since: November 2023
Authors: Hélio Goldenstein, Edwan Anderson Ariza Echeverri, Dany Michell Andrade Centeno, Luiz Henrique Dias Alves, Henrique Boschetti Pereira
C Si Mn P S Cr Ni Mo Ti 0.81 0.23 1.03 0.01 0.01 0.22 0.01 0.02 0.002 Finite element simulations were performed using the temperature-dependent mechanical properties observed in the tensile tests.
The other temperature-dependent physical and mechanical properties used were considered according to the phases (and/or microconstituents) present: austenite and pearlite.
Goldenstein, The role of welding parameters on the control of the microstructure and mechanical properties of rails welded using FBW, J.
Pinto, Microstructure and mechanical properties of a flash butt welded pearlitic rail, J.
Bhadeshia, Material Factors, in: Handb.
Online since: January 2011
Authors: Xiao Ming Tao, P. Xue, Keun Hoo Park
It is also shown that the physically coating processes will not significantly affect the mechanical properties of the fibers and yarns.
In fact the lower density usually lead to a higher add-on, therefore, the add-on is one of the most important factors which will affect the conductivity.
(a) PP filament yarn; (b) 100% cotton spun yarn Fig. 6 Conductivity of PVA /CBs coated yarn at different CB weight portion Discussion Effect of coating on mechanical properties of the yarns It is desired that conductive yarns after coating can retain the most of strength, stiffness and flexibility while gaining good conductivity.
The retainability of textile properties is very important because the conductive yarn would be transformed into textile structures by weaving, knitting or other manufacturing processes in smart textiles or other applications.
Fig. 7, as an example, shows the tensile behavior of the yarn was not significantly affected by the coating processes.
Online since: August 2011
Authors: Jian Li, Bin Ting Yang
The results show that compaction pressure is an important factor on green density.
The appearance of axial tensile stress is the important factor which causes delamination and cracks.
The maximum relative density increases, the minimum relative density decreases and the increasing amplitude is much larger than the decreasing amplitude while the average relative density drops,in other words, the mechanical properties of the green compact is deteriorated.
When the friction coefficient is larger than 0.1, the friction coefficient begin to work and affect the compact densification.
The density drop (0.033) of compact 1 is smaller than the drop compact 2, and the mechanical properties of compact 1 is much better too.
Online since: October 2025
Authors: Michael Ebie Onyia, Thompson Edozie Okeke, Fidelis Onyebuchi Okafor
The physical and chemical properties of coconut shells and coconut shell ash can vary significantly based on species, processing methods, harvesting conditions, and environmental factors [24].
Poor bonding may reduce the mechanical strength and durability of concrete blocks, adversely affecting their structural performance [13, 22].
Variability in raw material properties and environmental factors, which are not explicitly accounted for, may influence the accuracy and applicability of the predictions.
The following factors were considered: a) Raw Material Variability: The model assumes consistency in the chemical composition, physical properties, and replacement ratios of coconut shell and ash across all samples.
R., Mechanical properties of coconut shell concrete, Journal of Building Material Science, 2(1): 24-30, 2020
Online since: October 2013
Authors: Paul Kah, Jukka Martikainen, Madan Shrestha
Various factors have to be considered when assessing the feasibility of welding dissimilar metals and producing a sound weld joint.
This paper presents a broad classification of the most commonly used welding processes for dissimilar materials, discusses some of the commonly used welding processes with examples of some common material combinations, critical factors for good welding, and practical difficulties arising from the physical and chemical properties of materials.
Sound joints with good mechanical properties, however, are difficult to achieve by those conventional welding processes which form brittle Fe-Al intermetallic compound (IMC) layer at the interface of a steel/aluminum weld [8].
However, the properties are suitable for use in most normal applications [14].
The main factors that influence the properties of dissimilar welded joints and any variations in these factors that may lead to failure (cracking) are discussed below: Weld Metal.
Online since: October 2011
Authors: Jiang Feng Gong, Wei Hua Zhu, Kai Xiao Zhang, Bo Zhang, Chang Yong Lan
ZnO Nanostructures and Field Emission Properties on Cu Substrate Achieved by Electrodeposition Method Jiangfeng.
Field emission investigation indicated that the nanoflowers exhibited good emission properties.
However, Au atom may substitute Zn atom during the growth process, which will affect its physical properties significantly.
Field emission properties of ZnO nanoflowers were carefully studied.
Field emission properties of the nanflowers were studied in detail.
Online since: June 2012
Authors: Li Ping Chang, Xue Dong Han, Li Wei, Gang Luo
As a result, the intensity of the bottom chord affect the security factor of the whole bridge, and as a result of the stress concentration appeared around the tapped holes when the bottom chord transfers the force, the intensity around the tapped holes is directly related to the bottom chord.
Table 1 T300/QY8911 mechanical properties of material material property mean value material property mean value 135 8.8 0.48 0.33 3.32 4.47 Fig. 3 The geometric model of the bottom chord bilateral reinforcing and the finite element model of the reinforcing part 4, The result of calculation and analysis When the bottom chord is only under gravity and axial tension, the local stress cloud chart on the condition of no reinforcement,unilateral and bilateral reinforcement are shown in the Fig.4, and the ultimate stress values is shown in Table 2
Therefore, it is very necessary to analyze the laminated composites mechanical properties around the reinforcing bottom chord.
While the ply angle affect the stress distribution of the Y direction a lot, and the max stress value is on the 0 DEG layer.
Ply angle of the composite material layer almost have no effect on the stress distribution of the X direction, while affect the stress distribution of the Y direction a lot, and the maximum stress value is on the 0 DEG layer.
Online since: February 2013
Authors: Zill-e Hasnain Minhas, Sun Qin
Temperature Evolution in High Frequency Mechanical Loading Zill-e-Hasnain Minhas1, a, Dr.
Coupling between thermal and mechanical effects are called thermo-mechanical behavior.
A direct derivation of Heinz’s energy equation can be made by using strain rate as the deriving factor [1].
Fatigue damage evolution at higher frequencies can be de affected with viscous heat dissipation.
Chen: Temperature effect induced by uniaxial tensile loading, Journal of material Science 26 (1991) 5685-5692 [3] A.Chrysochoos, A.Blanche,B.Berthel,B.Wattrise: Energy balance properties of steels subjected to high cycle fatigue, T.
Online since: September 2013
Authors: Jing Xie, Yao Bin Hu, Liang Bin Hu
Since no intermediate transmission links, mechanical friction is greatly reduced, so that the moving noise is decreased and the energy loss caused by friction and elastic deformation is greatly reduced too. 4 Key technology problems and solution countermeasures It can be said that the development and application of linear motors has promoted the development of modern machine tool technology, and may cause a revolutionary changes in the structure and properties of the machine tool.
(1) Efficiency and power factor Compares with the same capacity rotating motor, the efficiency and power factor is lower, especially at low speed.
Otherwise, if the heat dissipation is not good, it will restrict the intensity of electrical parameters (such as current), thereby constraining the size of the thrust and affecting the motor performance
(4) Servo control Although the linear motor feed system eliminates the elastic deformation of the intermediate transmission mechanism, the gap, friction and other factors which affect the system accuracy, all kinds of interferences (such as workpiece weight, changing of cutting force) are directly passed on to the linear motor without any intermediate links’ attenuation and increase the difficulty of servo control.
China Mechanical Engineering. 1997,8(4):85~88 (in Chinese)
Online since: March 2018
Authors: Ali Esmaeili, Abdel Magid S. Hamouda
Friction stir processing (FSP) is a thermos-mechanical process for modifying the microstructural and material properties of metals.
First of all, FSP may change material properties over the thickness and material behavior is the same as functionally graded materials [5-7].
Influence of TiO2 nanoparticles incorporation to friction stir welded 5083 aluminum alloy on the microstructure, mechanical properties and wear resistance.Journal of Alloys and Compounds, 712, 795–803, 2017
Effect of multi-pass friction stir processing on the microstructure, mechanical and wear properties of AA5083/ZrO2 composites.
Correlating the microstructure to mechanical properties and wear behavior of an accumulative back extruded Al-Mg2Si in-situ composite, Tribology International, Volume 115, November 2017, Pages 199-211
Showing 6741 to 6750 of 26166 items