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Online since: October 2017
Authors: Kanwal Jit Singh, Jatinder Kapoor, Inderpreet Singh Ahuja
Higher level of every input factors gives higher MRR for all materials [2, 5].
USM of glass and porcelain material conclude that TWR is affected by various input factors such as; tool material, operation time, work material thickness, work material properties, tool size, tool cross section area, abrasive type, grit, static load and power rating [60].
No Author (s) Work material Input machining pa factors Response and Optimized Results Results or conclusion 1.
Some essential properties are shown in Table 2 [57,58,59,62].
Glass – Nature, Structure, and Properties.
USM of glass and porcelain material conclude that TWR is affected by various input factors such as; tool material, operation time, work material thickness, work material properties, tool size, tool cross section area, abrasive type, grit, static load and power rating [60].
No Author (s) Work material Input machining pa factors Response and Optimized Results Results or conclusion 1.
Some essential properties are shown in Table 2 [57,58,59,62].
Glass – Nature, Structure, and Properties.
Online since: March 2021
Authors: Aleš Jíra, Pavel Tesárek, Zdeněk Prošek, Pavla Ryparová, Petr Bílý
The micromechanical properties of precipitating CaCO3 by different bacteria are the same.
Its biggest disadvantage is that the bacteria need urea during self-healing by the precipitation of CaCO3, which negatively affects the resulting mechanical properties of cementitious materials [11].
Mechanical properties of cementitious materials were assessed by means of nanoindentation.
Spontaneous crystallization of the culture medium led to an increase in micromechanical properties.
In addition, micromechanical properties of individual phases will be tested without affecting the surrounding phases, and the effect of the self-healing agent on micromechanical properties at the interface between cementitious materials and the crystallized self-healing agent will be studied.
Its biggest disadvantage is that the bacteria need urea during self-healing by the precipitation of CaCO3, which negatively affects the resulting mechanical properties of cementitious materials [11].
Mechanical properties of cementitious materials were assessed by means of nanoindentation.
Spontaneous crystallization of the culture medium led to an increase in micromechanical properties.
In addition, micromechanical properties of individual phases will be tested without affecting the surrounding phases, and the effect of the self-healing agent on micromechanical properties at the interface between cementitious materials and the crystallized self-healing agent will be studied.
Online since: March 2017
Authors: Leslie Joy L. Diaz, Jasmin Z. Vasquez
However, most starch-based plastics exhibit poor mechanical properties.
In order to develop composites with better mechanical properties and environmental performance, it is necessary to increase the hydrophobicity of the plant fiber to improve the interface between the matrix and the fibers.
Analysis of variance was employed using Design Expert 7.0 and significant factors affecting the tensile strength were determined at 95% confidence level.
Table 2.Thermoplastic Starch Matrix, Untreated and Treated Abaca Fiber Properties.
Mechanical Properties of Abaca Fiber Reinforced Urea Formaldehyde Composites.
In order to develop composites with better mechanical properties and environmental performance, it is necessary to increase the hydrophobicity of the plant fiber to improve the interface between the matrix and the fibers.
Analysis of variance was employed using Design Expert 7.0 and significant factors affecting the tensile strength were determined at 95% confidence level.
Table 2.Thermoplastic Starch Matrix, Untreated and Treated Abaca Fiber Properties.
Mechanical Properties of Abaca Fiber Reinforced Urea Formaldehyde Composites.
Online since: August 2014
Authors: Ai Ai Zhang, Wen Jin Zhang, Wei Fang Zhang, Qi Song
Fig. 1 The Relationship between Atmospheric Corrosion and Water Film Thickness on Metal Surface
Factors of Marine Atmospheric Influencing Aluminum Alloy Corrosion
There is so many factors affecting the corrosion process of aluminum alloy, which can be broadly divided into two categories.
The first one is environmental factors, and the second one is the material factors, namely its material type, its alloying elements and other internal factors.
Thus, Cl-concentration is one of the factors affecting the aluminum corrosion.
The alteration between wet and dry surface leads to higher salt concentration, thus affecting the corrosion rate of the material [4].
Meanwhile rainfall will affect the frequency of alternation between wet and dry state in marine atmosphere, thus affecting the corrosion rate of aluminum alloy.
The first one is environmental factors, and the second one is the material factors, namely its material type, its alloying elements and other internal factors.
Thus, Cl-concentration is one of the factors affecting the aluminum corrosion.
The alteration between wet and dry surface leads to higher salt concentration, thus affecting the corrosion rate of the material [4].
Meanwhile rainfall will affect the frequency of alternation between wet and dry state in marine atmosphere, thus affecting the corrosion rate of aluminum alloy.
Online since: October 2006
Authors: Jong Min Kin, Bong Suk Kim, Soo Hun Lee, Min Sung Hong
A Study on the Surface Characteristics with the Vibration Factor
in the Micro-Machine
Jong-Min Kim
1,a, Min-Sung Hong1,b, Bong-Suk Kim
1,c and Soo-Hun Lee1,d
1
Division of Mechanical Engineering, Ajou University, Suwon, Korea
a
griffon0@ajou.ac.kr, bmshong@ajou.ac.kr, cvibguy@ajou.ac.kr, d
slee@ajou.ac.kr
Keywords: Surface Shaping System, Vibration, Surface Roughness, Surface Texture Evaluation,
Micro Machining
Abstract.
In micro machining, however, the surface shape is affected by not only the machining parameters mentioned earlier but also tool stiffness, system stability, and workpiece properties caused by the miniatured structure and cutting tool.
The cutting force is affected by the machining conditions such as cutting speed, feed rate, depth of the cut, tool geometries and workpiece materials in general.
The analytical equations of the machine's operation including various errors caused by the kinematical tool runs out, elastic deformation, and machine vibration, etc., as well as higher order motions can be, in turn, written, in general form, as: nm vdrp j ii n i m vdrp rHEEENt HEEENtr A i ),....,,,,,( ),...,,,,,( ,1 1 0 − =Π= (5) where rE : error caused by tool run out, dE : error caused by elastic deformation, vE : error caused by machine vibration, mH : higher order motion Equation (5) can be further expanded to describe more complex situations by accounting for the desired factor.
In micro machining, however, the surface shape is affected by not only the machining parameters mentioned earlier but also tool stiffness, system stability, and workpiece properties caused by the miniatured structure and cutting tool.
The cutting force is affected by the machining conditions such as cutting speed, feed rate, depth of the cut, tool geometries and workpiece materials in general.
The analytical equations of the machine's operation including various errors caused by the kinematical tool runs out, elastic deformation, and machine vibration, etc., as well as higher order motions can be, in turn, written, in general form, as: nm vdrp j ii n i m vdrp rHEEENt HEEENtr A i ),....,,,,,( ),...,,,,,( ,1 1 0 − =Π= (5) where rE : error caused by tool run out, dE : error caused by elastic deformation, vE : error caused by machine vibration, mH : higher order motion Equation (5) can be further expanded to describe more complex situations by accounting for the desired factor.
Online since: December 2022
Authors: José Divo Bressan, Caroline Zanini Bressan, Rodrigo Noguerol Correa
Thus, polishability is affected by different variables such as the abrasion particles features, metallurgical factors of material and the previous surface feed marks from the milling process.
However, the presence of inclusions in the steel microstructure, which are added to increase machinability, such as non-metallic inclusions, oxides and sulphides, can diminish the polishability, depending on their size and distribution [2,3], affecting the quality of mould surface.
So, the main material properties required for application in polymer injection moulds are yield strength, abrasion resistance, corrosion resistance, machinability and polishability or glow finish.
Soon after, the AISI P20 steel and its variations with superior hardness and good combination of mechanical properties and low cost were introduced [4] in the mould production.
Designing, planning and conducting an experiment that simultaneously includes combinations of multiple factors and their interactions, which may affect the outcomes, is a much more efficient research methodology for empirical modelling.
However, the presence of inclusions in the steel microstructure, which are added to increase machinability, such as non-metallic inclusions, oxides and sulphides, can diminish the polishability, depending on their size and distribution [2,3], affecting the quality of mould surface.
So, the main material properties required for application in polymer injection moulds are yield strength, abrasion resistance, corrosion resistance, machinability and polishability or glow finish.
Soon after, the AISI P20 steel and its variations with superior hardness and good combination of mechanical properties and low cost were introduced [4] in the mould production.
Designing, planning and conducting an experiment that simultaneously includes combinations of multiple factors and their interactions, which may affect the outcomes, is a much more efficient research methodology for empirical modelling.
Online since: September 2024
Authors: Artem Ruban, Viktoriya Pasternak, Kyrylo Pasynchuk, Pavlo Polyanskyi
The study aims to investigate the influence of various factors, such as geometry, boundary conditions, iterative processes, displacement of points in space, and loading on the accuracy and efficiency of the obtained numerical solution.
Chen, Microstructure, mechanical properties and machinability of particulate reinforced Al matrix composites: a comparative study between SiC particles and high-entropy alloy particles.
Lu, Influences of impact energy on the densification and mechanical properties of powder metallurgical Fe–C–Cu preforms during a powder-forged process.
Ruban, Investigation of the properties of powder materials using computer modeling.
Wen-zhi, Tensile properties and microstructure of rheo-diecast 7075 alloy prepared by serpentine channel process.
Chen, Microstructure, mechanical properties and machinability of particulate reinforced Al matrix composites: a comparative study between SiC particles and high-entropy alloy particles.
Lu, Influences of impact energy on the densification and mechanical properties of powder metallurgical Fe–C–Cu preforms during a powder-forged process.
Ruban, Investigation of the properties of powder materials using computer modeling.
Wen-zhi, Tensile properties and microstructure of rheo-diecast 7075 alloy prepared by serpentine channel process.
Online since: August 2013
Authors: Abdeljalil Lahmar, Bertrand Garnier, Driss Sakami
These films have very specific properties which can be very different from that of the bulk material.
The objective is to highlight the effect of a thermal treatment on the thermal properties.
Identification of the Thermophysical Properties of Thin Film and of the Film/substrate Interface.
Consequently, the modifications of the film composition and the porosity can occur during the growth phase affecting simultaneously the thermophysical and mechanical film properties.
The mechanism could be complex because there are possibilities that porosity creates a denser structure affecting film adhesion.
The objective is to highlight the effect of a thermal treatment on the thermal properties.
Identification of the Thermophysical Properties of Thin Film and of the Film/substrate Interface.
Consequently, the modifications of the film composition and the porosity can occur during the growth phase affecting simultaneously the thermophysical and mechanical film properties.
The mechanism could be complex because there are possibilities that porosity creates a denser structure affecting film adhesion.
Online since: December 2012
Authors: T. Srinivasan, K. Palanikumar, K. Rajagopal
Rajagopal3 c
1Research Scholar, Dept. of Mechanical Engineering, Jawaharlal Nehru Technological University, Kutkatpally, Hyderabad, A.P, India.
2 Dept. of Mechanical Engineering, Sri Sai Ram Institute of Technology, West Tambaram, Chennai, India.
3Department of Mechanical Engineering, Jawaharlal Nehru Technological University, Kutkatpally, Hyderabad, A.P, India
aseenusreeja@gmail.com, bpalanikumar_k@yahoo.com, crajagopalmail@yahoo.com
Keywords: Glass fiber, thermoplastic matrix, drilling, delamination.
The life of the joining can be critically affected by the quality of the drilled holes.
The material system should preferably be designed for specific end use (tailoring) necessitating a combination of desired properties.
Their high strength to weight ratio, enhanced resistance to environmental hazards, lower density, high fatigue resistance, wear resistance and related properties has widened the range of application leading to large scale substitution of conventional engineering materials for aerospace to consumer goods.
The increase of feed rate increases the delamination factor in drilling.
The life of the joining can be critically affected by the quality of the drilled holes.
The material system should preferably be designed for specific end use (tailoring) necessitating a combination of desired properties.
Their high strength to weight ratio, enhanced resistance to environmental hazards, lower density, high fatigue resistance, wear resistance and related properties has widened the range of application leading to large scale substitution of conventional engineering materials for aerospace to consumer goods.
The increase of feed rate increases the delamination factor in drilling.
Online since: November 2015
Authors: Ru Wang, Grzegorz Adamczewski, Bogumiła Chmielewska, Zheng Hong Yang, P. Wang
Bond strength between concrete being a substrate and material placed on it depend on the properties of both materials and on physico-chemical phenomena affecting the bond [6].
Regarding to the substrate the following properties are the most important: mechanical strength, roughness, porosity, moisture content, contaminations.
Table 3: Materials properties and samples size, where φ – diameter, h – high.
Chmielewska, Uwarunkowania adhezji w złączach budowlanych/Factors affecting adhesion in building joints, Cement Wapno Beton, 2, 2005, pp. 74-85
Chmielewska, Adhesion strength and other mechanical properties of SBR modified concrete, International Journal of Concrete Structures and Materials, V.2 no.1 (2008), p. 3
Regarding to the substrate the following properties are the most important: mechanical strength, roughness, porosity, moisture content, contaminations.
Table 3: Materials properties and samples size, where φ – diameter, h – high.
Chmielewska, Uwarunkowania adhezji w złączach budowlanych/Factors affecting adhesion in building joints, Cement Wapno Beton, 2, 2005, pp. 74-85
Chmielewska, Adhesion strength and other mechanical properties of SBR modified concrete, International Journal of Concrete Structures and Materials, V.2 no.1 (2008), p. 3