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Online since: July 2016
Authors: Mohd Asri Selamat, Mohamad Sazali Said, Jaharah A. Ghani, Nurul Na'imy Wan, Hassan C.H. Che
Introduction
Metal Matrix Composites (MMCs) have many potential engineering applications – in many industries including automotive and aerospace industries; due to their superior mechanical properties such as high strength, high hardness, good wear resistance and excellent weight ratio [1].
MMCs possess the combined properties of metals and ceramics [2, 3].
The structure and properties of MMCs are affected by the type and properties of the matrix, reinforcement and interface [4].
ANOVA was performed to find whether individual factors and their interactions that affect the tool life were meaningful.
The other important factors were cutting speed (16.09%) and feed rate (8.83%).
MMCs possess the combined properties of metals and ceramics [2, 3].
The structure and properties of MMCs are affected by the type and properties of the matrix, reinforcement and interface [4].
ANOVA was performed to find whether individual factors and their interactions that affect the tool life were meaningful.
The other important factors were cutting speed (16.09%) and feed rate (8.83%).
Online since: October 2007
Authors: A. Malchere, Claude Esnouf, O. Uzlov, V.I. Bolshakov
Investigation Of Acicular Ferrite Structure And Properties Of
C-Mn-Al-Ti-N Steels
O.
This can be harmful to mechanical properties for cleavage cracks can propagate readily across the packets [1].
Compare properties of acicular ferrite obtained in a C-Mn-Al-Ti-N steel with properties of other steels with similar alloying system.
Formation of thin layer of inert allotriomorphic ferrite on the austenite grain surfaces leads to decreasing of mechanical properties since cracks can propagate easily through allotriomorphic ferrite network.
b) Mechanical properties The results of the tensile tests are given in Table 2.
This can be harmful to mechanical properties for cleavage cracks can propagate readily across the packets [1].
Compare properties of acicular ferrite obtained in a C-Mn-Al-Ti-N steel with properties of other steels with similar alloying system.
Formation of thin layer of inert allotriomorphic ferrite on the austenite grain surfaces leads to decreasing of mechanical properties since cracks can propagate easily through allotriomorphic ferrite network.
b) Mechanical properties The results of the tensile tests are given in Table 2.
Online since: January 2015
Authors: Xu Zhang, Ming Zhu Liu, Yun Xiong
The structures and properties of the SAPs are strongly affected by the reaction conditions.
As the effect of these factors has been discussed in detail in the previous literature, we just gave out the test results in Figure 4.
Fig. 5 Swelling kinetic behaviors of SAPs in 0.9wt% saline solution Mechanical properties of the SAPs.
For effective application of a hydrogel on hygiene products, it is extremely important that the hydrogel presents satisfied mechanical properties [21].
El-Naggar, Swelling and mechanical properties of superabsorbent hydrogels based on Tara gum/acrylic acid synthesized by gamma radiation, Carbohyd.
As the effect of these factors has been discussed in detail in the previous literature, we just gave out the test results in Figure 4.
Fig. 5 Swelling kinetic behaviors of SAPs in 0.9wt% saline solution Mechanical properties of the SAPs.
For effective application of a hydrogel on hygiene products, it is extremely important that the hydrogel presents satisfied mechanical properties [21].
El-Naggar, Swelling and mechanical properties of superabsorbent hydrogels based on Tara gum/acrylic acid synthesized by gamma radiation, Carbohyd.
Online since: August 2013
Authors: Yong Ping Guan, Wen Zhao, Xin Xie, Shen Gang Li, Guo Feng Wang
Based on the pit excavation engineering in Shenyang, which sits atop the existing tunnels, the risk factors and failure type of shield segment lining were studied through risk analysis theory.
Basic mechanical parameters are shown in Fig.1.
Mechanical properties of each soil layer are shown in table 1.
It is obviously that the normal layer excavation method has great effect on the longitudinal deformation. 4.3 The total risk estimation of shield segment under the various factors The risk assessment of existing tunnel was conducted according to the random finite computing result and theory of risk analysis.
The total failure probability under various factors is 41.18%.
Basic mechanical parameters are shown in Fig.1.
Mechanical properties of each soil layer are shown in table 1.
It is obviously that the normal layer excavation method has great effect on the longitudinal deformation. 4.3 The total risk estimation of shield segment under the various factors The risk assessment of existing tunnel was conducted according to the random finite computing result and theory of risk analysis.
The total failure probability under various factors is 41.18%.
Online since: April 2014
Authors: Ya Fang Zhang, Hao Liu, Pei Ran Chen, Qing Hua Wu
The reinforcing and toughening effect of fiber reinforced concrete (FRC) are mainly under control of the interfacial bond strength in between of fiber and concrete, and the embedded length of fiber is one of the significant factors for interfacial bond strength.
Introduction The fiber reinforced concrete (FRC) is a composite with good prospect and conforms to the building modernization, which of favorable mechanical properties including the resistance of compressive, shear impact, frost and corrosion [1], therefore attracts increasing attention received from military defense engineering, repair reinforced engineering, geotechnical engineering and constructional engineering.
The mechanical properties of fiber reinforced concrete are determined by fiber, matrix and interface.
To simplify the model, in this study, we focus on influence of fiber embedded length on the properties of single fiber pull-out test.
Effect of interfacial properties on the crack propagation in cementitious composites, J.
Introduction The fiber reinforced concrete (FRC) is a composite with good prospect and conforms to the building modernization, which of favorable mechanical properties including the resistance of compressive, shear impact, frost and corrosion [1], therefore attracts increasing attention received from military defense engineering, repair reinforced engineering, geotechnical engineering and constructional engineering.
The mechanical properties of fiber reinforced concrete are determined by fiber, matrix and interface.
To simplify the model, in this study, we focus on influence of fiber embedded length on the properties of single fiber pull-out test.
Effect of interfacial properties on the crack propagation in cementitious composites, J.
Online since: January 2012
Authors: Li Li, Yun Wang
To a large extent, the design and the property quality of belt ply and carcass will directly affect the quality of radial tire. while moving , the belt ply is the main stress components, and its main component is the steel cords.
Rubber is an isotropic and incompressible elastic body, its physical properties showed a high degree of nonlinear, therefore, steel cords can be considered as linear elastic material[2].
During the operation of the tire, steel wire in belt ply is the main stress components,the property quality of the tire is mainly reflected in the strength of steel wires and the adhesion properties among steel wire.
From the above equations we can see that the tension of steel wire is not only related to its own property but also the shape of tire, the angle of steel wire placed and the size of outside loads.
However, while in the process of driving, the tire is affected by the road conditions, temperature, pressure, etc, and many other factors, so simulation results obtaining from the analysis in this paper may have a certain deviation from the actual situation.
Rubber is an isotropic and incompressible elastic body, its physical properties showed a high degree of nonlinear, therefore, steel cords can be considered as linear elastic material[2].
During the operation of the tire, steel wire in belt ply is the main stress components,the property quality of the tire is mainly reflected in the strength of steel wires and the adhesion properties among steel wire.
From the above equations we can see that the tension of steel wire is not only related to its own property but also the shape of tire, the angle of steel wire placed and the size of outside loads.
However, while in the process of driving, the tire is affected by the road conditions, temperature, pressure, etc, and many other factors, so simulation results obtaining from the analysis in this paper may have a certain deviation from the actual situation.
Online since: July 2014
Authors: Han Zhang, Yi Wan, Zhan Qiang Liu, Fu Lin Jiang
Research on transient temperature of cutting tool during high speed slot milling of AISI H13
Fulin Jiang1,2,a, Zhanqiang Liu1,2,b , Yi Wan1,2,c and Han Zhang1,2,d
1School of Mechanical Engineering, Shandong University, Jinan 250061, China
2Key Laboratory of High Efficiency and Clean Mechanical Manufacture (Shandong University), Ministry of Education, Jinan, China
asdujiangfulin@gmail.com, bmelius@sdu.edu.cn, cwanyi@sdu.edu.cn, d87757285@163.com
Keywords: Cutting tool temperature, High speed, Slot milling, AISI H13
Abstract: Cutting tool temperature is the main factor that directly affects tool wear and tool life.
As the cutting speed increases, cutting temperature becomes one of the most important factors restricting high speed machining which is associated with high materical removal rate and high induced temperature.
Heating and cooling affect tool insert alternately, and the temperature of tool insert increases first and then decreases in a milling operation period.
In order to simplify the tool insert temperature problem, we consider the thermal properties of the tool insert material as independent of temperature and heat radiation is regardless.
As the cutting speed increases, cutting temperature becomes one of the most important factors restricting high speed machining which is associated with high materical removal rate and high induced temperature.
Heating and cooling affect tool insert alternately, and the temperature of tool insert increases first and then decreases in a milling operation period.
In order to simplify the tool insert temperature problem, we consider the thermal properties of the tool insert material as independent of temperature and heat radiation is regardless.
Online since: December 2015
Authors: Dalbir Singh, M.S. Nisha
Embedding CNT and CNF fiber is easy, and this does not downgrade the material’s mechanical properties.
Glass fiber reinforced polymers (GFRP) have high tensile strength, heat and fire resistance properties, chemical resistance, and moisture resistance properties which make it appropriate for the above fields.
Many research studies show that mixing of MWCNT together with resin by ultra-sonication and mechanical stirrer results in improvement of the mechanical and electrical properties when applied between E type glass fiber.
Thus, addition of CNF and MWCNT makes the material to sense the structural damages without affecting its structural strength.
Ayatollahi et al, Mechanical and electrical properties of epoxy/ multi walled carbon Nano tube/ Nano clay Nano composite, 2011
Glass fiber reinforced polymers (GFRP) have high tensile strength, heat and fire resistance properties, chemical resistance, and moisture resistance properties which make it appropriate for the above fields.
Many research studies show that mixing of MWCNT together with resin by ultra-sonication and mechanical stirrer results in improvement of the mechanical and electrical properties when applied between E type glass fiber.
Thus, addition of CNF and MWCNT makes the material to sense the structural damages without affecting its structural strength.
Ayatollahi et al, Mechanical and electrical properties of epoxy/ multi walled carbon Nano tube/ Nano clay Nano composite, 2011
Online since: June 2018
Authors: Saurav Barua, A.B.M. Tausif Ullah Chy, Mehedi Ahmed Ansary
Several soil properties, such as-cohesion, angle of internal friction and density were measured.
Using borehole (BH) log data and above mentioned soil properties, polder embankments were modelled using Geo5 software.
Fig. 3 presents soil properties obtained from field tests in various soil layers of the above mentioned boreholes.
Since, different grain sizes affects the engineering properties of soil and influence soil classification, grain size analysis provided the required grain size distribution.
Safety factors (FoS) is higher than critical 1.2 in all of the above scenarios.
Using borehole (BH) log data and above mentioned soil properties, polder embankments were modelled using Geo5 software.
Fig. 3 presents soil properties obtained from field tests in various soil layers of the above mentioned boreholes.
Since, different grain sizes affects the engineering properties of soil and influence soil classification, grain size analysis provided the required grain size distribution.
Safety factors (FoS) is higher than critical 1.2 in all of the above scenarios.
Online since: September 2013
Authors: Milan Prokolab, Ana Alil, Bojan Gligorijevic, Marina Kutin, Marko Ristic
This paper analysis the cause’s dynamically loaded screws failure, using the structural analysis of mechanical properties and numerical simulation.
Fracture, which is a most severe form of material damage, is under influence of numerous factors, such as: mechanical stresses, temperature, composition and properties of atmosphere, shapes and dimensions of a part or construction; structure and properties of material and quality of surface [1-5].
Next, investigation of mechanical properties of materials screws (yield stress, tensile strength, elongation, hardness and contraction of cross section) was done.
The as-received screws were probably in rolled and quenched and tempered condition according to structure and mechanical properties (Table 2).
It is considered the information about presence of impurities, microcavities, microcracks, primary and secondary structure and mechanical properties.
Fracture, which is a most severe form of material damage, is under influence of numerous factors, such as: mechanical stresses, temperature, composition and properties of atmosphere, shapes and dimensions of a part or construction; structure and properties of material and quality of surface [1-5].
Next, investigation of mechanical properties of materials screws (yield stress, tensile strength, elongation, hardness and contraction of cross section) was done.
The as-received screws were probably in rolled and quenched and tempered condition according to structure and mechanical properties (Table 2).
It is considered the information about presence of impurities, microcavities, microcracks, primary and secondary structure and mechanical properties.