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Online since: December 2012
Authors: Othman Mamat, Tahir Ahmad, Rafiq Ahmad
These materials exhibit a unique set of microstructures and mechanical properties not found either in monolithic ceramics or metals.
The mechanical properties of MMPCs depends on the microstructure and properties of matrix materials, nature of the particles, the distribution, size and shape of particles and the interfacial behaviour between particles and matrix.
Pagounis et al. [5] produced steel matrix composites using hot Isostatic pressing (HIP) and studied the factors influencing the reinforcement distribution, interface processes, as well as mechanical and corrosion properties.
Different microstructural parameters such as hardness, volume fraction, size, shape and distribution of the embedded particles, the properties of the matrix and the interfacial bonding between two phases, also affect the mechanical properties of these ceramic particles reinforced composites.
The good binding interface between the matrix and reinforcement results in better mechanical properties of the composites.
The mechanical properties of MMPCs depends on the microstructure and properties of matrix materials, nature of the particles, the distribution, size and shape of particles and the interfacial behaviour between particles and matrix.
Pagounis et al. [5] produced steel matrix composites using hot Isostatic pressing (HIP) and studied the factors influencing the reinforcement distribution, interface processes, as well as mechanical and corrosion properties.
Different microstructural parameters such as hardness, volume fraction, size, shape and distribution of the embedded particles, the properties of the matrix and the interfacial bonding between two phases, also affect the mechanical properties of these ceramic particles reinforced composites.
The good binding interface between the matrix and reinforcement results in better mechanical properties of the composites.
Justification of the Efficiency of Application of Plaster for Fire Protection of Concrete Structures
Online since: October 2024
Authors: Maryna Sukhanevych, Yuriy Tsapko, Olga P. Bondarenko, Oleksii Tsapko
Therefore, the object of research was the change in the properties of concrete during a fire and its protection when applying a heat-insulating layer of plaster, which is able to inhibit the temperature when the flame affects the coating.
In addition, the factors and relationship between the degree of damage caused by concrete cracking / flaking and the post-tensioning tendon strength were evaluated.
To determine the operational properties of the plaster, technological properties were determined, in particular, compressive strength.
Liang, Experimental study on the effect of fireproof coating and cooling methods on the mechanical properties of concrete exposed to high temperature.
Kodur, High Temperature Mechanical Properties of High-Strength Fly Ash Concrete with and without Fibers.
In addition, the factors and relationship between the degree of damage caused by concrete cracking / flaking and the post-tensioning tendon strength were evaluated.
To determine the operational properties of the plaster, technological properties were determined, in particular, compressive strength.
Liang, Experimental study on the effect of fireproof coating and cooling methods on the mechanical properties of concrete exposed to high temperature.
Kodur, High Temperature Mechanical Properties of High-Strength Fly Ash Concrete with and without Fibers.
Online since: November 2005
Authors: Qing Yuan Wang, Zhu Feng Yue, Ai Qin Wang, T. Li, Z.X. Wen
Experimental Study of the High Temperature Mechanical Behaviors of
TLP Bonding of Two Ni-base Single Crystals
T.
The mechanical behaviors of TLP single crystal is compared to the behaviors of base material.
Thus, TLP bonding produces a good joint having the same structure of the base metal and approximate property to that of the base metal.
In this paper, the study of TLP is focused on the high temperature mechanical property, the failure mode, and fracture mechanism of the welding joint.
Factors such as the composition of the interlayer alloy, diffusion time, isothermal solidification time can all affect the formation of the inter-metallic phases and induce inhomogeneity into the microstructure.
The mechanical behaviors of TLP single crystal is compared to the behaviors of base material.
Thus, TLP bonding produces a good joint having the same structure of the base metal and approximate property to that of the base metal.
In this paper, the study of TLP is focused on the high temperature mechanical property, the failure mode, and fracture mechanism of the welding joint.
Factors such as the composition of the interlayer alloy, diffusion time, isothermal solidification time can all affect the formation of the inter-metallic phases and induce inhomogeneity into the microstructure.
Online since: September 2020
Authors: Haia Aldosari
The mechanical properties increase by addition of the PE-co-GMA compatibilizer.
Mechanical properties of polymer blends. 4. 6.
Mechanical loss factor spectra of blends polymer.
The mechanical properties increased with the addition of the PE-co-GMA.
As a consequence, PBC provides the best mechanical properties.
Mechanical properties of polymer blends. 4. 6.
Mechanical loss factor spectra of blends polymer.
The mechanical properties increased with the addition of the PE-co-GMA.
As a consequence, PBC provides the best mechanical properties.
Online since: May 2013
Authors: Laurent Tabourot, Ahmed Maati, Elhadj H. Ouakdi, Pascale Balland, Virginie Pouzols
An analytical model has been proposed by Zhang [4] in which several influencing factors should be considered: material properties, boundary conditions effects, the specimen thickness and material anisotropy.
The factor f=rmrm'=θ1θ2 expresses the numerical value of the springback (springback factor), as shown in Figure 3.
The calculated values of springback depending on the sheet thickness, the bend radius and the material properties obtained by the use of the relationship (2) are compiled in Table 3 for each material.
The table 4 summarizes; on the one hand the results obtained by different numerical simulations considering two influencing factors e and rp, and on the other hand the results obtained by the use of the relationship (4).
Note that this displacement corresponding to the bending depth does not significantly affect the springback for small values (U value from 1 to 4 mm is tested).
The factor f=rmrm'=θ1θ2 expresses the numerical value of the springback (springback factor), as shown in Figure 3.
The calculated values of springback depending on the sheet thickness, the bend radius and the material properties obtained by the use of the relationship (2) are compiled in Table 3 for each material.
The table 4 summarizes; on the one hand the results obtained by different numerical simulations considering two influencing factors e and rp, and on the other hand the results obtained by the use of the relationship (4).
Note that this displacement corresponding to the bending depth does not significantly affect the springback for small values (U value from 1 to 4 mm is tested).
Online since: June 2013
Authors: Xiang Yang Xu, Yan Fang Liu, Ming Chong Mao, Gang Shi
The calculated results show that the operating environment and current are important factors leading to thermal failure of solenoid valves.
The stability and reliability of solenoid valves directly affects the quality and safety of the entire electro-hydraulic control system and even the whole equipment.
Too high or too low operating voltage, excess number of cycles and high duty cycle are the main factors.
Since those failure factors with strong nonlinear coupling relations mainly originated from a multi-physical field, determining the key factors influence the reliability and life of solenoid valves and discover their influence rule is critical to reliability design of solenoid valves.
Finally, the properties of the materials of solenoid valve used in the current study are shown in Table 1.
The stability and reliability of solenoid valves directly affects the quality and safety of the entire electro-hydraulic control system and even the whole equipment.
Too high or too low operating voltage, excess number of cycles and high duty cycle are the main factors.
Since those failure factors with strong nonlinear coupling relations mainly originated from a multi-physical field, determining the key factors influence the reliability and life of solenoid valves and discover their influence rule is critical to reliability design of solenoid valves.
Finally, the properties of the materials of solenoid valve used in the current study are shown in Table 1.
Online since: December 2023
Authors: Ayyannan Devaraju, D. Palanisamy, Manikandan Natarajan, Thejasree Pasupuleti
Because it contains the expected mechanical properties, such as strength and resistance to corrosive behavior in severe conditions, it is ideal for usage and can be used to a variety of applications.
Goiria, Development of laser welding of Ni based superalloys for aeronautic engines applications (experimental process and obtained properties), Phys.
Martin, Effect of friction stir welding speed on mechanical properties and microstructure of nickel based super alloy Inconel 718, Sci.
Effect of Nd:YAG Laser Welding on Microstructure and Mechanical Properties of Incoloy Alloy 800.
Microstructure and Properties of Inconel 718 and AISI 416 Laser Welded Joints.
Goiria, Development of laser welding of Ni based superalloys for aeronautic engines applications (experimental process and obtained properties), Phys.
Martin, Effect of friction stir welding speed on mechanical properties and microstructure of nickel based super alloy Inconel 718, Sci.
Effect of Nd:YAG Laser Welding on Microstructure and Mechanical Properties of Incoloy Alloy 800.
Microstructure and Properties of Inconel 718 and AISI 416 Laser Welded Joints.
Online since: September 2011
Authors: Xiao Diao Huang, Yi Min Deng, Bo Qin Gu, Bao Shou Sun
China
2College of Mechanical and Power Engineering, Nanjing University of Technology, Nanjing, 210009, P.R.
Influence factors of warpage of products are analyzed.
Table 2 PC material properties Type polycarbonates(PC) Melt density(g/cm3) 1.0114 Thermal conductivity(W/m·°C) 0.25 Heat capacity(J/kg·°C) 2300 Recommended die temperature(°C) 82-99 Recommended melt temperature(°C) 343-377 Maximum shear stress(MPa) 0.5 Maximum shear rate(1/s) 40000 Fig.1 Cover part mesh We mesh the model and introduce the mesh size as the source of noise.
The above-mentioned experiment utilizes the orthogonal table with 4 factors and 3 levels to arrange the tests.
Journal of Mechanical Engineering, Vol. 53 (2007)No.7, pp503-518
Influence factors of warpage of products are analyzed.
Table 2 PC material properties Type polycarbonates(PC) Melt density(g/cm3) 1.0114 Thermal conductivity(W/m·°C) 0.25 Heat capacity(J/kg·°C) 2300 Recommended die temperature(°C) 82-99 Recommended melt temperature(°C) 343-377 Maximum shear stress(MPa) 0.5 Maximum shear rate(1/s) 40000 Fig.1 Cover part mesh We mesh the model and introduce the mesh size as the source of noise.
The above-mentioned experiment utilizes the orthogonal table with 4 factors and 3 levels to arrange the tests.
Journal of Mechanical Engineering, Vol. 53 (2007)No.7, pp503-518
Online since: December 2009
Authors: Huey Lin Ho, Su Hai Hsiang, Zun Yao Huang
This study investigated the mechanical properties and forming characteristics of flanged
parts made of AZ61 magnesium alloys via hot working.
They argued that limited extrusion speeds and magnesium alloy AZ31 ratios affected billet temperature.
In 2007, Yamin et al. [7] applied the extrusion process to magnesium alloy AZ61A, and performed a series of experiments using cup-rod combined extrusion processes to investigate the impacts of technological factors, such as deformation temperature and lubrication, on the plastic properties of magnesium alloy AZ61A.
To prevent material adhesion and friction under high temperatures from affecting experimental results, graphite lubricant is added to the material surface.
The ring compression test applied to the magnesium alloy under the same forming temperature and compression volume, the constant shear friction factors of different lubricants in descending order were as follows: dry friction > boron nitride > graphite > molybdenum disulphide. 3.
They argued that limited extrusion speeds and magnesium alloy AZ31 ratios affected billet temperature.
In 2007, Yamin et al. [7] applied the extrusion process to magnesium alloy AZ61A, and performed a series of experiments using cup-rod combined extrusion processes to investigate the impacts of technological factors, such as deformation temperature and lubrication, on the plastic properties of magnesium alloy AZ61A.
To prevent material adhesion and friction under high temperatures from affecting experimental results, graphite lubricant is added to the material surface.
The ring compression test applied to the magnesium alloy under the same forming temperature and compression volume, the constant shear friction factors of different lubricants in descending order were as follows: dry friction > boron nitride > graphite > molybdenum disulphide. 3.
Online since: December 2006
Authors: S.L. Toh, T.K.H. Teh, S. Vallaya, J.C.H. Goh
Bombyx mori silk, though used in
biomedical sutures for decades due to its excellent mechanical properties, has been overlooked for
applications in ligament tissue engineering, only until recently.
Comparing with other natural fibers, silk bears superior mechanical properties in terms of strength and elasticity [5].
Silk also consists of diverse amino acid side chemistries for facile coupling of selected growth or cell adhesion factors [8].
The feasibility of tissue engineered ligament construct also depends largely on the scaffold architecture, which affects important properties such as mechanical behavior and cell support capabilities.
Table 1 shows the tensile properties of the knitted silk scaffolds.
Comparing with other natural fibers, silk bears superior mechanical properties in terms of strength and elasticity [5].
Silk also consists of diverse amino acid side chemistries for facile coupling of selected growth or cell adhesion factors [8].
The feasibility of tissue engineered ligament construct also depends largely on the scaffold architecture, which affects important properties such as mechanical behavior and cell support capabilities.
Table 1 shows the tensile properties of the knitted silk scaffolds.