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Online since: November 2023
Authors: Elina Barone, Baiba Gaujena, Martins Vilnitis
The penetration depths of bulleted wood material are related to the physical properties of wood [20,21] The timber's derogations (like the inhomogeneity) affect its mechanical properties, including the projectile's performance.
UHMWPE has properties such as low water absorption [40,41].
Carbon structures' mechanical properties are calculated theoretically with a strength of 100.00 MPa and Young’s modulus of 1060 GPa.
Knauf Vidiwall is gypsum combined with cellulose fibers, which results in a rigid, stable plate with excellent physical and mechanical properties when pressed.
However, this work does not cover variable factors like angle and distance (5 m distance in the standard), and does not include limiting factors such as material assembly, joints, ballistic resistance of joints, sudden changes in bullet velocity, bullet dimensions, bullet tip shape, and occasionally the possibility of ricochet.
UHMWPE has properties such as low water absorption [40,41].
Carbon structures' mechanical properties are calculated theoretically with a strength of 100.00 MPa and Young’s modulus of 1060 GPa.
Knauf Vidiwall is gypsum combined with cellulose fibers, which results in a rigid, stable plate with excellent physical and mechanical properties when pressed.
However, this work does not cover variable factors like angle and distance (5 m distance in the standard), and does not include limiting factors such as material assembly, joints, ballistic resistance of joints, sudden changes in bullet velocity, bullet dimensions, bullet tip shape, and occasionally the possibility of ricochet.
Online since: December 2013
Authors: Muhammad Ammar Nik Mutasim, Nurul Suraya Azahari, Ahmad Alif Ahmad Adam
Prediction of Particle Impact on an Archimedes Screw Runner Blade for Micro Hydro Turbine
Muhammad Ammar Nik Mu’tasim1, a, Nurul Suraya Azahari2,b and Ahmad Alif Ahmad Adam3,c
123Computational Analysis Group, Faculty of Mechanical Engineering, Universiti Malaysia Pahang,Pekan, 26600 Pekan, Pahang DarulMakmur.
The turbines extract energy from the fluid and change it into energy such as mechanical energy output and usually in rotating form or shaft.
Another factor that decreases the efficiency is due to erosion.
Previous researcher[4] states that the characteristics of the channel flow properties is observed in portable wind tunnel with rainfall simulation by using Reynolds-averaged Navier-Stokes (RANS) k-ε turbulence model.
The velocity vector was affected by the turbine blade as the stream of the turbine hit the wall and at the same time the velocity vector diverged in two direction which is upper and lower vertices.
The turbines extract energy from the fluid and change it into energy such as mechanical energy output and usually in rotating form or shaft.
Another factor that decreases the efficiency is due to erosion.
Previous researcher[4] states that the characteristics of the channel flow properties is observed in portable wind tunnel with rainfall simulation by using Reynolds-averaged Navier-Stokes (RANS) k-ε turbulence model.
The velocity vector was affected by the turbine blade as the stream of the turbine hit the wall and at the same time the velocity vector diverged in two direction which is upper and lower vertices.
Online since: August 2009
Authors: Yong Wang, Bin Han, M.Y. Li, W.M. Zhao, Yi Yuan Cheng, Chao Wen Li
Among these surfacing techniques, laser surface melting (LSM) can be used as a new and
promising process to enhance the surface properties of a component in a protective gas atmosphere.
After LSM, the ensuing self-quenching is rapid enough to eliminate the need for external quenching to produce a wide range of intriguing microstructure while the properties of the bulk can be preserved.
Despite of various studies on the use of LSM for the improvement of surface properties [7], little attention has been paid to the influence of overlapping on the microstructures and corrosion resistance.
Thus, the G/R value becomes the controlling factor for the morphology selection.
In order to obtain homogenous mechanical and corrosion properties on the surface of the treated material, the influence of the OR of laser tracks has been investigated: 16.7%, 33.3% and 50% OR were chosen.
After LSM, the ensuing self-quenching is rapid enough to eliminate the need for external quenching to produce a wide range of intriguing microstructure while the properties of the bulk can be preserved.
Despite of various studies on the use of LSM for the improvement of surface properties [7], little attention has been paid to the influence of overlapping on the microstructures and corrosion resistance.
Thus, the G/R value becomes the controlling factor for the morphology selection.
In order to obtain homogenous mechanical and corrosion properties on the surface of the treated material, the influence of the OR of laser tracks has been investigated: 16.7%, 33.3% and 50% OR were chosen.
Online since: October 2023
Authors: Juan Antonio Ferriz-Papi, Gasak Abdul-Hussain, William Holderbaum, Guowu Wei, Haitham El-Hussieny, Theodoros Theodoridis
Tactile sensors are devices or systems that can provide measurements for objects’ properties or contact events through the process of actual contact between the object and sensor.
Nevertheless, there are significant factors to be accounted for during the sensor fabrication viz. sensitivity, flexibility and stretchability. 2.
Research Aims The objective of this study was to design a conductive fabric tactile sensor with stretchable properties for measuring muscle activity by using commonly available conductive stretchable materials.
These properties were deemed suitable for applications which required low resistance.
The fabric’s beneficial properties in varied e-tactile applications have been proven before.
Nevertheless, there are significant factors to be accounted for during the sensor fabrication viz. sensitivity, flexibility and stretchability. 2.
Research Aims The objective of this study was to design a conductive fabric tactile sensor with stretchable properties for measuring muscle activity by using commonly available conductive stretchable materials.
These properties were deemed suitable for applications which required low resistance.
The fabric’s beneficial properties in varied e-tactile applications have been proven before.
Online since: August 2007
Authors: Ho Dong Yang, Yong Bum Kim, Yool Kwon Oh
Numerical Simulation on Thermal Strain Characteristics of
Casting Mold for Automobile Tire
Yong Bum Kim
1,a, Ho Dong Yang1,b and
Yool Kwon Oh
2,c
1
Department of Precision Mechanical Engineering, Chosun University, South Korea.
2
Department of Mechatronics Engineering, Chosun University, South Korea.
Moreover, the introduced technique of numerical simulation applying a FEM is very useful and important things in the mechanical behavior of materials, especially needs the accuracy improvement such as aluminum alloy casting mold products.
Value of temperature at each point [K] Time Temperature Point Time Temperature Point 720 � 592 � 670 � 617 � 300sec 677 � 600sec 600 � 556 � 528 � 572 � 541 � 900sec 559 � 1200sec 530 � From the results of calculated temperature distributions, the surface of aluminum alloy mold could be happened deformation and tire mold could be affected the precision when temperature difference occurred rapidly during the cooling process.
Also, the principle factor of stress development could be rapidly fallen the temperature variation.
Cheon: The Effect of the Metallic Mold Cooling System on the Solidification Structures and the Mechanical Properties for Al alloy Castings, Dong-A University, Korea (1994)
Moreover, the introduced technique of numerical simulation applying a FEM is very useful and important things in the mechanical behavior of materials, especially needs the accuracy improvement such as aluminum alloy casting mold products.
Value of temperature at each point [K] Time Temperature Point Time Temperature Point 720 � 592 � 670 � 617 � 300sec 677 � 600sec 600 � 556 � 528 � 572 � 541 � 900sec 559 � 1200sec 530 � From the results of calculated temperature distributions, the surface of aluminum alloy mold could be happened deformation and tire mold could be affected the precision when temperature difference occurred rapidly during the cooling process.
Also, the principle factor of stress development could be rapidly fallen the temperature variation.
Cheon: The Effect of the Metallic Mold Cooling System on the Solidification Structures and the Mechanical Properties for Al alloy Castings, Dong-A University, Korea (1994)
Online since: October 2014
Authors: Eun Young Yi, Myung Sook Kim, Myung Jin Bae
Particularly, the equal loudness contours and sound pressure were compared to analyze how these devices affect the auditory sense of a human being.
Characteristics of Human Auditory Sense and Properties of BA Earphones Characteristics of Human Auditory Sense Figure 1 below illustrates the graph of equal loudness (ISO 226:2003), which can be applied to average people of 18~30-year-old with normal hearing ability.
This mechanism ultimately converts electric energy into mechanical acoustic energy.
It should be pointed out that many factors affect the sound quality of earphones.
Those factors include materials, shape of housing, internal structure, type of cable material, and type of driver unit.
Characteristics of Human Auditory Sense and Properties of BA Earphones Characteristics of Human Auditory Sense Figure 1 below illustrates the graph of equal loudness (ISO 226:2003), which can be applied to average people of 18~30-year-old with normal hearing ability.
This mechanism ultimately converts electric energy into mechanical acoustic energy.
It should be pointed out that many factors affect the sound quality of earphones.
Those factors include materials, shape of housing, internal structure, type of cable material, and type of driver unit.
Online since: June 2014
Authors: Qi Zhong Li, Lian Meng Zhang, Dong Ming Zhang
To improve the mechanical and other properties porous Al, the control of such pore characteristics is indispensable [7].
So the major factor affecting the porosity of the porous Al is the content of NaCl.
Ashby, Cellur Solids: Structure and Properties, Cambridge Univ.
Mabuchi, Effect of sintering temperature on compressive properties of porous aluminum produced by spark plasma sintering, Mater.
Kitahara, ALPORAS Aluminum foam: Process, properties and applications, Adv.
So the major factor affecting the porosity of the porous Al is the content of NaCl.
Ashby, Cellur Solids: Structure and Properties, Cambridge Univ.
Mabuchi, Effect of sintering temperature on compressive properties of porous aluminum produced by spark plasma sintering, Mater.
Kitahara, ALPORAS Aluminum foam: Process, properties and applications, Adv.
Online since: August 2016
Authors: Zhu Ji Jin, Shuang Ji Shi, Xiao Guang Guo, Fei Xie
Natural single crystal diamond is an ideal tool material for ultra-precision machining because of its excellent mechanical and physical properties.
The modified embedded-atom method (MEAM) potential represented various physical properties of iron very well.
Lee research and develop MEAM potential parameters for Fe–C systems perform well at several physical properties of the iron carbide [6].
Temperature variation is an important factor in the diamond tool wear during cutting process.
Liu, Diamond wear properties in cold plasma jet.
The modified embedded-atom method (MEAM) potential represented various physical properties of iron very well.
Lee research and develop MEAM potential parameters for Fe–C systems perform well at several physical properties of the iron carbide [6].
Temperature variation is an important factor in the diamond tool wear during cutting process.
Liu, Diamond wear properties in cold plasma jet.
Influence of Multiple Firing on the Bending Strength of Zirconia/Porcelain Bilayered Dental Ceramics
Online since: September 2011
Authors: Jie Mo Tian, Long Quan Shao, Bin Deng, Ning Wen, Yuan Fu Yi, Rong Jian Lu, Ting Ting Ma, Kang Lin Hou
Influence of Multiple Firing on the Bending Strength of Zirconia/Porcelain Bilayered Dental Ceramics
Rong-Jian Lu1,a, Ting-Ting Ma1, Yuan-Fu Yi2, Long-Quan Shao3, Jie-Mo Tian4, Kang-Lin Hou1, Ning Wen1 and Bin Deng1,b
1 Department of the Prosthodontics, The General Hospital of Chinese PLA, Beijing 100853,China
2 Department of the Stomatology, The General Hospital of Chinese People’s Armed Police Forces, Beijing 100039, China
3 Department of the Stomatology, The Nanfang Hospital, Guangzhou 510515, China
4 State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, China
a lrj200112@sina.com, b dengbin1971@yahoo.com.cn
Keywords: Dental ceramics; Zirconia; Mechanical properties; Multiple firing
Abstract.
Mechanical property of veneered zirconia was carried on single factor variance analysis with origin7.0 software, a = 0. 05.
Mechanical property of Zirconia/Vita VM9 ceramic composites showed in Table 1, the three-point bending strength of bilayered ceramic composites didn’t change significantly after 2 to 8 times firing, and strength difference among treatment groups was not statistically significant (p = 0.97567).
Material that still maintained good thermal stability after multiple firing, could make bilayer ceramic restoration better property.
This also reacted mechanics property between zirconia and veneer porcelain matched well.
Mechanical property of veneered zirconia was carried on single factor variance analysis with origin7.0 software, a = 0. 05.
Mechanical property of Zirconia/Vita VM9 ceramic composites showed in Table 1, the three-point bending strength of bilayered ceramic composites didn’t change significantly after 2 to 8 times firing, and strength difference among treatment groups was not statistically significant (p = 0.97567).
Material that still maintained good thermal stability after multiple firing, could make bilayer ceramic restoration better property.
This also reacted mechanics property between zirconia and veneer porcelain matched well.
Online since: January 2018
Authors: Zawawi Daud, Zulkifli Ahmad, Nurul Amira Md Nordin, Zulfairul Zakariah, Mohd Baharufin Ridzuan
The chemical modifications of fibres were carried out in order to improve mechanical properties of composites and adhesion between the fibres and matrix [9].
[5] Kasiviswanathan S.et. al, (2015) Evaluation of mechanical properties of natural hybrid fibers, reinforced polyester composite materials.
Tensile properties of kenaf fiber due to various conditions of chemical fiber surface modifications.
Effect of kenaf fibre modification on morphology and mechanical properties of thermoplastic polyurethane materials.
A review on chitosan-cellulose blends and nanocellulose reinforced chitosan biocomposites: Properties and their applications.
[5] Kasiviswanathan S.et. al, (2015) Evaluation of mechanical properties of natural hybrid fibers, reinforced polyester composite materials.
Tensile properties of kenaf fiber due to various conditions of chemical fiber surface modifications.
Effect of kenaf fibre modification on morphology and mechanical properties of thermoplastic polyurethane materials.
A review on chitosan-cellulose blends and nanocellulose reinforced chitosan biocomposites: Properties and their applications.