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Online since: July 2019
Authors: Vittorio Alfieri, Fabrizia Caiazzo, Maria Virginia Aliberti, Paolo Argenio
Depending on the application, specific surface properties in terms of texture and roughness are required.
Ongoing works are reported in the literature and are aimed to full understanding the effects of the governing factors on the response in terms of mechanical properties [3], which are mainly affected by possible residual porosity and resulting microstructure.
In this paper, an investigation about the resulting surface texture of the parts as a function of the governing factors is conducted and suggestions are provided to guide the reader in selecting the proper processing conditions.
As an example, surface quality can be preferred over strength to increase adhesion; conversely, low porosity is required to benefit from adequate mechanical properties, with lower surface quality.
Lin, “Influence of inherent surface and internal defects on mechanical properties of additively manufactured Ti6al4V alloy: comparison between Selective Laser Melting and Electron Beam Melting”, Materials, vol. 11, n. 537, 2018
Online since: August 2011
Authors: Yu Jun Liu, Bo Zhou, Zhi Yuan Wei
In addition, the factors affecting residual stress distributions was discussed, which include the cutting velocity, opening dimension, and constraint conditions.
The material of metal plate is mild steel for shipbuilding with the yield strength of 235Mpa at normal temperature, and the material properties such as thermal conductivity, specific heat, elastic modulus, Possion’s ratio, and thermal expansion coefficient are temperature dependent, which referred to the literatures [11].
FE model of oxygen cutting (mechanical analysis).
Two aspects of factors can contribute the discrepancies: one comes from the numerical model proposed, which contain the material properties at high temperature, the influence of phase change on residual stress fields, and the effect of partial material melting; the other comes from the errors caused by human factors in experimental measurement, which contain the quality of specimen surface grinding and strain-gages pasting, and the initial residual stresses caused by grinding.
In addition, it was discussed for the factors affecting residual stresses distribution, which contain cutting velocity, opening dimensions, and constraint conditions.
Online since: February 2013
Authors: Wu Jeng Li, Shih Miao Huang, Jui Chang Lin
Unlike core affect which exists within the person, it is a property of the stimulus a human perceives.
Eleven Component Factors Extracted from Group G1.
Table 2: Six factors extracted from Group G1b including 39 adjective pairs Eight Component Factors extracted from Group G2.
Nine factors extracted from Group G3a including 37 adjective pairs Twenty-two Component Factors extracted from Group G3.
These typical affective meanings were suggested as the affective meanings to describe interactive products, or as the semantic domains in Kansei Engineering to define the semantic properties of products.
Online since: August 2014
Authors: Tony Montesin, Virgil Optasanu, Pierre Jacquinot
A systematic investigation of the various factors (such as the residual stress, the surface pollution and the chemical composition of the oxidation atmosphere) is realized to separate their influence on the oxidation.
The main objective of this paper is to study the influence of the shot-peening on the oxidation by analyzing several factors: shot-peening duration, nature of the oxidant atmosphere, surface pollution and intensity of the stress values.
While the stress value is limited by the mechanical properties of the material, the stress gradient can reach very strong values if the variation of the stress is made within a very short length.
This is the proof that the mechanical state introduced during the shot-peening process is the main factor, and not the pollution, for the slower oxidation rate of the samples.
Summary The present works deal with the oxidation of shot-peened samples and investigate the influence of the main factors that can produce a slower oxidation of the shot-peened samples.
Online since: June 2015
Authors: P. Karunakaran, P. Sengottuvel, J. Arun, N.R.R. Anbusagar, V. Palanisamy
Materials having attractive properties such as high strength, high bending stiffness, good damping capacity, low thermal expansion and better fatigue characteristics which make them potential for modern day industrial application.
To overcome these challenges, new unconventional machining process with advanced methodology of EDM is used for successful machining of conductive and insulating materials of any hardness with good dimensional accuracy and surface finish since the conventional machining of advanced materials is often difficult due to the improved thermal, chemical and mechanical properties of new advanced materials2.
Therefore factors affecting of overcut is essential to recognize.
Therefore factors affecting of overcut is essential to recognize.
Recent Patents on Mechanical Engineering 2(2009),61-68
Online since: October 2010
Authors: Z.J. Zuo, Jun Jie Yang, Wu Xin Yu
Experimental Investigation on Air-aided Water EDM Junjie Yang1,a, Zhijiang Zuo1,b and Wuxin Yu1,c 1School of Electrical-mechanical Engineering, Jianghan University, Wuhan, 430056, China atoolyang@163.com, bdongfc2001@sohu.com, cyuwux@126.com Keywords: electric discharge machining (EDM), dielectric, water, air, energy factor Abstract.
An energy factor E is introduced and employed to estimate unit-area effective power input.
Higher discharge current and higher energy factor E obtain the higher MRR in air-aided water EDM with positive polarity tool.
Oil-related properties are degraded during long-term machining.
Therefore the total energy input affects the workpiece MRR directly.
Online since: May 2020
Authors: Wei Hua Cui, Bin Han, Xi Hao Liu, Hui Wang, Jia Yi Lin
With the rapid development of modern industry, mold as a basic hardware facility has become one of the important factors affecting the development of modern industry.
Its main advantage is to reduce the heat affected zone area of the weld zone by high-energy low-heat process.
The suitable material is coated on the surface of the failed mold to improve the surface properties such as wear resistance, hardness, strength and surface quality of the substrate.
Therefore, the addition of strengthening elements in an appropriate amount can effectively improve the surface properties of the repair mold.
Carry out a post-treatment test study on the repair of the cladding layer to improve the mechanical properties of the working surface of the repairing mold.
Online since: October 2013
Authors: V. Sridharan, Muthukrishnan Nambi, S. Deivanayagam
Natural fibre based composites are gaining more importance now-a-days due to their specific properties.
Composites are preferred over conventional metals in various fields due to their light-weight, high strength-to-weight ratio and stiffness properties.
They are low density materials possessing high specific properties [1].
The factors and levels are given in Table 2.
The interactions of factors are less significant than individual factors.
Online since: October 2014
Authors: Zi Qiang Wang, Zhe Yan Yu
In the meantime, main factors that affect the performance characteristics of the motor were investigated according to the formulas of motor torque.
The motor has a high degree of linearity of mechanical and controlling properties within a limited rotation angle.
Eq. 8 shows that the stiffness is the key factor affecting the magnitude of the magnetic restoring torque.
(a) (b) (c) Fig. 6 Main factors that affect the performance characteristics of the motor: (a) influence of the arc of rotor tooth on the range rotation angle; (b) influence of magnetomotive force of permanent magnets on magnetic restoring torque; (c) influence of magnetizing ampere-turns on electromagnetic torque.
The stiffness and torque constant are parameters that represent the magnitude of motor torque.The theoretical analysis of the stiffness and torque constant reveals the main factors that affect the performance characteristics of the motor are the arc of rotor tooth, the strength of the static magnetic field and the magnetizing ampere-turns.
Online since: November 2011
Authors: Xing Chang, Xiao Bin Huang
A study on forming process of chips during cutting cast iron Xiaobin Huang1, Xing Chang1 1 North University of China, School of Mechanical Engineering and Automation, 030051 Taiyuan, China aforge54@126.com, bmerryjukii@sina.com Keywords: Brittle metal, cutting, chip, deformation, fracture Abstract.In the present paper, the effects of the hardness, strength, chemical composition, microstructure, fracture properties of the material and other factors on the chips formation and deformation were studied during cutting the brittle metal.
Fracture properties are also subject to external conditions besides the material properties.
Fig.6 is the schematic diagram of mechanical state.
Secondly, the direction and the number of principal stress affect the size of plastic.
In addition to temperature and deformation rate, the state of stress is also the external conditions to determine the fracture properties.
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