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Online since: December 2017
Authors: M.J. do Nascimento Santos, A.G. Barbosa de Lima, João M.P.Q. Delgado
In polymer matrix composites reinforced by fibers, fiber and polymer combine some physical and mechanical properties generating a new material with properties different from the previous ones.
Anisotropy is the major problem that affects the composite properties.
For obtaining an ideal interface some factors must be considered.
Among these factors one can mention: the chemical and the physical bonds, the electrostatic and the mechanical interactions, and wetting properties.
· Mechanical properties comparable to other processes (assuming the same resin system and equal fiber content)
Anisotropy is the major problem that affects the composite properties.
For obtaining an ideal interface some factors must be considered.
Among these factors one can mention: the chemical and the physical bonds, the electrostatic and the mechanical interactions, and wetting properties.
· Mechanical properties comparable to other processes (assuming the same resin system and equal fiber content)
Online since: October 2016
Authors: Chen Li, Fei Hu Zhang, Xiao Shuang Rao
Thereafter, the abrasion of the softened material and pits takes place by mechanical diamond grinding wheel.
From the equation, the gap voltage is one main factor to discharge energy.
The typical material properties of this RB-SiC ceramic are listed in Table 2.
Chinese Journal of Mechanical Engineering. 44 (2008) 132-135
Journal of Mechanical Science & Technology, 27 (2013) 177-183.
From the equation, the gap voltage is one main factor to discharge energy.
The typical material properties of this RB-SiC ceramic are listed in Table 2.
Chinese Journal of Mechanical Engineering. 44 (2008) 132-135
Journal of Mechanical Science & Technology, 27 (2013) 177-183.
Online since: August 2022
Authors: Daniel César M. Cavalcante, A. Santos Pereira, Arthur G.F. Almeida, Sirlene A. Nunes, Guilherme Luiz Oliveira Neto, Ricardo Soares Gomez, Nívea Gomes Nascimento de Oliveira, Hortência Luma Fernandes Magalhães, Severino Rodrigues Farias Neto, Amanda K.F. Abreu
However, compared to hydrocyclones, membranes have low processing capacity and a continuous reduction in permeate flux due to two factors: solute accumulation (concentration polarization layer) and adsorption of components to the membrane surface (incrustation).
(22) d) Walls: On the walls, the non-slipping condition was considered, given by: Ux=Uy= Uz=0 (23) Table 1 illustrates the parameters and physicochemical properties of the materials used in the mathematical model.
Table 1 - Parameters and properties of fluids and membrane.
Photocatalytic membrane reactors for produced water treatment and reuse: fundamentals, affecting factors, rational design, and evaluation metrics, Journal of Hazardous Materials, 127493. 2021 [4] H.L.F.
Advances in Mechanical Engineering, 9, 3 (2017) 1-20
(22) d) Walls: On the walls, the non-slipping condition was considered, given by: Ux=Uy= Uz=0 (23) Table 1 illustrates the parameters and physicochemical properties of the materials used in the mathematical model.
Table 1 - Parameters and properties of fluids and membrane.
Photocatalytic membrane reactors for produced water treatment and reuse: fundamentals, affecting factors, rational design, and evaluation metrics, Journal of Hazardous Materials, 127493. 2021 [4] H.L.F.
Advances in Mechanical Engineering, 9, 3 (2017) 1-20
Online since: July 2016
Authors: Shahrum Abdullah, Norinsan Kamil Othman, Azman Jalar, Muhammad Nubli Zulkifli
This is because the capillary geometry affects the force vectors acting on the free air ball (FAB) and the compression of Au ball bonds, which consequently will produces different value of micromechanical properties across the Au ball bonds.
Tan, “Study of factors affecting the hardness of ball bonds in copper wire bonding,” Microelectron.
Pharr, “Measurement of mechanical properties by ultra-low load indentation,” Mater.
Soboyejo, “Nanoindentation measurements of the mechanical properties of polycrystalline Au and Ag thin films on silicon substrates: Effects of grain size and film thickness,” Mater.
Hong, “Relationship between mechanical properties and microstructure of ultra-fine gold bonding wires,” Mech.
Tan, “Study of factors affecting the hardness of ball bonds in copper wire bonding,” Microelectron.
Pharr, “Measurement of mechanical properties by ultra-low load indentation,” Mater.
Soboyejo, “Nanoindentation measurements of the mechanical properties of polycrystalline Au and Ag thin films on silicon substrates: Effects of grain size and film thickness,” Mater.
Hong, “Relationship between mechanical properties and microstructure of ultra-fine gold bonding wires,” Mech.
Online since: May 2012
Authors: You Xin Jiang, Xun Liu
The effects of the length and the content of PPF as well as the content of AEA on the physical properties (dry density, drying shrinkage) and mechanical properties (compressive strength, flexural strength) were investigated.
Table 1 to 3 show the chemical compositions of Portland cement, the mechanical properties of PPF and the mix proportions of FC, respectively.
The stability of foam can be affected by many factors such as temperature, humidity, atmospheric pressure and air movement.
Fig.3 shows the effects of PPF length and content on the mechanical properties (compressive strength and flexural strength) of FC.
Despite these benefits, it must be noticed that the action of PPF to compensate shrinkage is limited by the mechanical properties of itself.
Table 1 to 3 show the chemical compositions of Portland cement, the mechanical properties of PPF and the mix proportions of FC, respectively.
The stability of foam can be affected by many factors such as temperature, humidity, atmospheric pressure and air movement.
Fig.3 shows the effects of PPF length and content on the mechanical properties (compressive strength and flexural strength) of FC.
Despite these benefits, it must be noticed that the action of PPF to compensate shrinkage is limited by the mechanical properties of itself.
Online since: January 2011
Authors: Lian Chun Long, Zhong Ying Chen, Zhi Guang Yang
The experimental results showed that tensile mechanical properties of T300/AG80 composite laminated specimens were obviously superior to ones in compression test.
Introduction Carbon fiber composites materials are widely used as preferred structural materials for aerospace engineering, because of its excellent mechanical properties such as high specific strength, high specific modulus, light density, dimension stability, good heat resistance and material properties can be designed [1].
The tensile and compressive mechanical properties of specimens were tested in room temperature using electronic universal testing machine in order to design the magnitudes of pre-loads exerted on specimens during laser irradiation.
The magnitudes and differentials of pre-loads were designed according to the mechanical properties of composites tested in room temperature.
Conclusions (1) Tensile mechanical properties of T300/AG80 composite laminated specimens were much better than compressive mechanical properties
Introduction Carbon fiber composites materials are widely used as preferred structural materials for aerospace engineering, because of its excellent mechanical properties such as high specific strength, high specific modulus, light density, dimension stability, good heat resistance and material properties can be designed [1].
The tensile and compressive mechanical properties of specimens were tested in room temperature using electronic universal testing machine in order to design the magnitudes of pre-loads exerted on specimens during laser irradiation.
The magnitudes and differentials of pre-loads were designed according to the mechanical properties of composites tested in room temperature.
Conclusions (1) Tensile mechanical properties of T300/AG80 composite laminated specimens were much better than compressive mechanical properties
Online since: April 2012
Authors: Xu Chen, Hong Gao, Li Lan Gao
The resin matrix provides the physical and mechanical properties and the conductive spheres provide the electrical properties in the vertical, i.e.
The mechanical properties of ACF with strain rate and temperature had been studied [9].
It is crucial to understand how these environmental factors affect mechanical behaviors.
Gao, Mechanical properties of anisotropic conductive film with strain rate and temperature, Mater.
Gao, Hygrothermal effects on the tensile properties of anisotropic conductive films, J.
The mechanical properties of ACF with strain rate and temperature had been studied [9].
It is crucial to understand how these environmental factors affect mechanical behaviors.
Gao, Mechanical properties of anisotropic conductive film with strain rate and temperature, Mater.
Gao, Hygrothermal effects on the tensile properties of anisotropic conductive films, J.
Online since: March 2011
Authors: Claudio Giardini, Giancarlo Maccarini, Michela Longo, Gianluca Danilo D'Urso
The average cell size and the somehow irregular distribution of cell shape and size make the definition of average mechanical properties an hard task.
When dealing with material properties, however, it should be pointed out that foam mechanical strength is remarkably affected by cell defects.
As it was expected, no barrelling was noticed and cell breakage was the main factor affecting the material behaviour.
In such cases increasing density leads to increased mechanical properties.
Foam compressibility is achieved through either cell breakage or cell buckling; both these deformation modes are unable to raise mechanical properties.
When dealing with material properties, however, it should be pointed out that foam mechanical strength is remarkably affected by cell defects.
As it was expected, no barrelling was noticed and cell breakage was the main factor affecting the material behaviour.
In such cases increasing density leads to increased mechanical properties.
Foam compressibility is achieved through either cell breakage or cell buckling; both these deformation modes are unable to raise mechanical properties.
Online since: August 2013
Authors: Hua Wen Lv
,Beijing,100013, China
2Coal Mining and Design Branch, China Coal Research Institute, Beijing, 100013, China
alvhuawen2005@126.com
Key words: coal mine;soft rock chamber; bolt-grouting support; surrounding rock control; strata behaviors
Abstract: The soft rock stratum, possessing the characteristics of poor anchorage and large deformation, is frequently encountered in underground coal excavation where stability of the whole mining structure is always affected by the soft rock.
Problem formation Surrounding rock of chamber in ShiTanJing coal mine possesses the characteristics of poor anchorage and large deformation, the primary factors that significantly affect the utilization of chamber in coal mining.
Rock mechanical properties are key parameters in surrounding rock support design of chamber.
Thickness [m] Rock type RQD Elasticity modulus [Gpa] Poisson ration Uniaxial compressive strength[MPa] Cohesion [MPa] Internal frictional angle [°] 1.7 Carbon mudstone 30 24.8 0.27 32.34 9.87 29.63 7.8 Mudstone 30 15.2 0.30 25.91 7.55 27.2 5.0 Coal 0 - - 10.31 - - 2 Carbon mudstone 0 - - 21.32 - - Table 1 Main parameters of surrounding rock The rock softening property is also investigated due to the fact that coupling of rock deformation and water flow is frequently encountered in coal mining.
Problem formation Surrounding rock of chamber in ShiTanJing coal mine possesses the characteristics of poor anchorage and large deformation, the primary factors that significantly affect the utilization of chamber in coal mining.
Rock mechanical properties are key parameters in surrounding rock support design of chamber.
Thickness [m] Rock type RQD Elasticity modulus [Gpa] Poisson ration Uniaxial compressive strength[MPa] Cohesion [MPa] Internal frictional angle [°] 1.7 Carbon mudstone 30 24.8 0.27 32.34 9.87 29.63 7.8 Mudstone 30 15.2 0.30 25.91 7.55 27.2 5.0 Coal 0 - - 10.31 - - 2 Carbon mudstone 0 - - 21.32 - - Table 1 Main parameters of surrounding rock The rock softening property is also investigated due to the fact that coupling of rock deformation and water flow is frequently encountered in coal mining.
Online since: December 2023
Authors: Ramachandran Velmurugan, Vaibhav Somaji Anuse, Krishnapillai Shankar, Sung Kyu Ha
These findings highlight the importance of considering multiple factors when designing composite materials that can withstand impact loading and maintain their structural integrity.
Introduction Composite materials are used in aerospace structures due to excellent in-plane properties.
Compression-After-Impact (CAI) strength is one of the mechanical properties of composite materials that are commonly used to assess their post-impact behavior.
Studies related to glass fibers suggest that they have better toughness than carbon fibers, but they have a compromise in other mechanical properties such as stiffness and strength.
Alipour, Studying the effect of different carbon and glass fabric stacking sequence on mechanical properties of epoxy hybrid composite laminates, Compos.
Introduction Composite materials are used in aerospace structures due to excellent in-plane properties.
Compression-After-Impact (CAI) strength is one of the mechanical properties of composite materials that are commonly used to assess their post-impact behavior.
Studies related to glass fibers suggest that they have better toughness than carbon fibers, but they have a compromise in other mechanical properties such as stiffness and strength.
Alipour, Studying the effect of different carbon and glass fabric stacking sequence on mechanical properties of epoxy hybrid composite laminates, Compos.