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Online since: April 2023
Authors: Abdullah Altin
Introduction Nickel-based superalloys have attracted a great deal of interest from aircraft and nuclear industry with the heat treatment industry because of its resistance to heat, excellent mechanical properties, resistance to corrosion and high temperature operation [1].
ANOVA is utilized to statistically determine the degree of significance of the process factors that affect performance characteristics [7].
Response Surface Methodology (RSM) is employed to obtain an empiric correlation between the control factors and responses.
In order to compare the influence of factors on different responses, the average S/N ratios of responses related to the levels are calculated and given in Table 2.
The most effective factor on the cutting force by ANOVA is found to be cutting speed (58.54%), followed by feed rate (41.10%) and for the surfage roughness the most effective factor is feed rate (80,09%), folloved by cutting speed (5,4%) for machining Incoloy 901.
Online since: November 2014
Authors: Nadzhratul Husna Ahmad Puad, Mohd Faris Khamidi, Syed Ahmad Farhan, Khairun Azizi Azizli
Reinforcement of Aerogel with binding materials can improve its mechanical and thermal properties to overcome its brittleness.
Table 1 below shows the comparison of physical properties between Aerogel and Maerogel.
The density of xonotlite-type calcium silicate is the main factor affecting the effective thermal conductivity of xonotlite–Aerogel composite insulation material, and the density of Aerogel has little influence.
Polymer crosslinking on a lower density silica framework was used in order to improve the mechanical properties.
Hyun, Effect of mixing on thermal and mechanical properties of Aerogel-PVB composites, Journal of Materials Science, 38 (2003) 1961-1966
Online since: October 2014
Authors: Ahmad Rivai, Omar Bapokutty, Wai Chee Mun
The material properties used for the metallic hinge bracket are listed in Table 1.
The lamina properties of IM7/8552, listed in Table 2, were calculated using micromechanics formula recommended by Barbero [7] with the fiber and matrix properties obtained from Hexcel [10,11].
Table 1: Mechanical Properties of AA7075-T651 Elastic Modulus (MPa) 71700 Ultimate Tensile Strength (MPa) 572 Yield Strength (MPa) 503 Poisson’s Ratio 0.33 Density (g/cm3) 2.81 Table 2: Mechanical Properties of IM7/8552 Lamina Longitudinal Modulus (MPa) 167480 Transverse Modulus (MPa) 23437 In-plane Poisson’s Ratio 0.34 In-plane Shear Modulus (MPa) 5574 Longitudinal Tensile Strength (MPa) 3441 Longitudinal Compressive Strength (MPa) 5574 Transverse Tensile Strength (MPa) 100 Transverse Compressive Strength (MPa) 288 In-plane Shear Strength (MPa) 121 Density (g/cm3) 1.588 Results and Analysis Preliminary Analysis.
FEA results yield should be similar regardless of the FE software used as long as the problem statement, which consists of the loads and boundary conditions, mesh quality, and material properties, is modeled correctly.
Since the strength of laminated composite structures are determined by the macromechanics such as the laminate stacking sequence, identification of the stress distribution allows the optimization of the macromechanics factors to be performed on the composite structure.
Online since: June 2011
Authors: Mostapha Tarfaoui
The Abaqus computer code is used. 2D Modeling of the joint The mechanical and geometrical properties of the adherents and adhesive are given in table 1.
The properties of the ply are given in table 3.
However, it is not an easy task to determine the degraded properties of damaged material with certainty.
Those are affected by other factors like the density of crack, which complicates the execution of the numerical methods in macroscopic modeling of damage.
The material properties of the laminated composite were defined to be dependent upon two field variables
Online since: May 2020
Authors: Lei Liu, Run Huang, Lan Zhang
Table 2 Summary of the effect of Co2+ incorporation on the angiogenic properties of implant.
Improving the Other Properties of Implants.
The incorporation of Co2+ could also affect the tribological properties of implants.
Yunfei Zheng et al [10] studied the mechanical properties of co-doped TCP.
In addition, cobalt doping increases the implant's mechanical properties, such as modulus, bending strength and fracture toughness, and other properties, such as martensite transformation and MCE, performance to a certain extent.
Online since: December 2013
Authors: Evgeniy Viktorovich Shesterikov, Alena Igorevna Malchikhina, Sergei I. Tverdokhlebov
Calcium-phosphate coatings formed in mixture of argon and oxygen at 1:1 ratio pressure of 0.3 Pa have the best physical and chemical, mechanical and tribological properties.
Herewith, the metal implants mechanical properties are not deteriorate; surface morphology is not disturbed; the oxide film thickness is sufficient to reduce output of the alloying elements from the metal substrate in the biological environment to an acceptable level.
Separately oxide and CaP coatings have barrier properties and capable to reduce the implant corrosion rate in the organism biological environment.
Also mixing of CaP coating with the substrate material is observed, which provides good adhesive properties.
Mechanical properties of CaP coatings are not depend on the substrate material.
Online since: January 2019
Authors: Jun Li, Hong Wei Yang, Jiang Shuai Wang, Kui Dong Luo, Xin Zhang
The research results can provide reference for the analysis of the factors affecting the riser stress in deep water drilling.
Egeland[7] (1982) used linear and nonlinear methods to analyze the mechanical problems of drilling risers in deepwater semi-submersible drilling rigs.
Bjorset et al.[8] (1998) studied static and dynamic mechanical analysis of fluid-filled drilling risers.
It is assumed that the riser, casing and formation are homogeneous in the horizontal direction, and the thermal and mechanical parameters are not changed.
Problems affecting the design of drilling risers[C].
Online since: October 2023
Authors: Sipokazi Mabuwa, Velaphi Msomi
The loss in precipitates consequently resulted in a loss in the joint’s mechanical properties.
This variation in mechanical behaviour is primarily attributed to different alloying elements in each aluminium alloy, each of which has a unique sensitivity to various factors.
Understanding how the microstructure of FSW and TIG welded magnesium-rich aluminium alloys affects their mechanical properties will provide insights into how these alloys can be further optimized for various applications.
Figure 4: (a) Tensile properties of FSW and TIG welded joints; (b) Bending results for FSW and TIG welded joints Conclusions The correlation between the microstructure and the mechanical properties of friction stir welded and TIG welded joints was studied successfully.
Msomi, The effect of FSP conditions towards microstructure and mechanical properties of the AA6082/AA8011 TIG-welded joint, Mater.
Online since: July 2014
Authors: M. Muthukannan, M. Brajesh, P. Rajeshkanna, S. Jeyakuma, N. Vikneswaran
Taking atmospheric as film temperature the properties are taken from Heat and Mass Transfer Data book.
From those properties Reynolds number, Nusselt number, heat transfer co-efficient and heat transfer are calculated.
Impinging jet flow characteristics are even more complicated with additional variables affecting the flow such as angle of impingement, distance from impingement surface.
Parameters affecting flow field For the present case, the flow field variation has been investigated over the following parameters.
So the present experimental investigating exploring that the Reynolds number and reattachment length are the dominant factors which are affecting the flow field and heat transfer also.
Online since: August 2004
Authors: Akira Shimamoto, Teroko Aoki
Those characteristics are examined with calculated loss factors obtained by measuring resonance frequencies and attenuation characteristics.
The table-1 shows the mechanical property of constituents of the TiNi fiber and the epoxy resin.
Figure 3 indicates that loss factors of the specimens are between 0.01 and 0.1.
The loss factors are not apparently affected by increasing currents where pre-strains are between 0 and 3 %.
(1) The loss factors measured in this experiment are found in the range between 0.01 and 0.1.
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