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Online since: July 2022
Authors: Nithyaraaj Kugalur Palanisamy, Edouard Rivière Lorphèvre, Pedro José Arrazola, François Ducobu
The complexity of the cutting process further increases with Ti6Al4V alloy because of its intrinsic properties such as high chemical reactivity, low thermal conductivity, etc. [4, 5].
The material properties employed in the model are given in Table 2.
The mass scaling factor of 1,000 was considered as it shows a significant decrease in the computational time, without affecting the results [19].
The thermal properties are adopted from the reference [21].
The cost function calculated with the equal weighting factors and the different weighting factor shows that µ = 0.21 has the minimum cost function.
The material properties employed in the model are given in Table 2.
The mass scaling factor of 1,000 was considered as it shows a significant decrease in the computational time, without affecting the results [19].
The thermal properties are adopted from the reference [21].
The cost function calculated with the equal weighting factors and the different weighting factor shows that µ = 0.21 has the minimum cost function.
Online since: May 2021
Authors: Natalya A. Gasratova, Victor S. Zuev
Scheme of the nylon seal
· Physical and mechanical properties of materials [7] are given in table 1:
Table1.
Features of the Material PMMA is an amorphous polymer, the physical and mechanical properties of which depend on many parameters: temperature, strain rate, molar mass, characteristics of the external load, manufacturing method.
The temperature limits that characterize the mechanical properties of polymers are not material constants and depend on the rate or time of the strain.
After taking into account the non-linear properties of PMMA, the numerical calculation approached the experiment, the error of the FEM decreased on average to <5%.
The presence of the nylon seal between the aluminum hatch and the main acrylic sphere greatly affects the stress in the contact area.
Features of the Material PMMA is an amorphous polymer, the physical and mechanical properties of which depend on many parameters: temperature, strain rate, molar mass, characteristics of the external load, manufacturing method.
The temperature limits that characterize the mechanical properties of polymers are not material constants and depend on the rate or time of the strain.
After taking into account the non-linear properties of PMMA, the numerical calculation approached the experiment, the error of the FEM decreased on average to <5%.
The presence of the nylon seal between the aluminum hatch and the main acrylic sphere greatly affects the stress in the contact area.
Online since: February 2022
Authors: Vacily A. Klimenov, Kirill Kurgan, Artem Ustinov, Аnatoliy A. Klopotov, Mikhail S. Slobodyan
These changes in mechanical properties were caused the microstructural transformations upon the welding thermal cycles [7–43].
Reddy, Effect of frequency of pulsing in gas tungsten arc welding on the microstructure and mechanical properties of titanium alloy welds, J.
Sankaranarayanasamy, Some studies on mechanical properties and microstructural characterization of automated TIG welding of thin commercially pure titanium sheets, Mater.
Ram, Microstructure and mechanical properties of Ti-15-3 alloy gas tungsten arc welds prepared using CP-titanium filler, Trans.
Egorov, Effect of welding and heat treatment regimes on the mechanical properties of various titanium alloy welded joints, Chem.
Reddy, Effect of frequency of pulsing in gas tungsten arc welding on the microstructure and mechanical properties of titanium alloy welds, J.
Sankaranarayanasamy, Some studies on mechanical properties and microstructural characterization of automated TIG welding of thin commercially pure titanium sheets, Mater.
Ram, Microstructure and mechanical properties of Ti-15-3 alloy gas tungsten arc welds prepared using CP-titanium filler, Trans.
Egorov, Effect of welding and heat treatment regimes on the mechanical properties of various titanium alloy welded joints, Chem.
Online since: August 2014
Authors: Hong Mei Cao
Because of the long-term effects of some disadvantageous factors such as loading, structure-fatigue, erosion, material aging etc, there will be inevitably coming up with natural aging, accumulations of damage and paroxysmal accident for bridge structures during their services.
In recent years, frequent accidents including collapse of the bridges bring about serious damages to human lives and property.
It is an important factor that affects signal processing ability, transferring efficiency and signal-noise ratio.
In this system, there are mainly three factors affecting the quality of the real-time: speed of liquid conduction, the speed of CPU and the speed of data transition.
So we can see that the decisive factor that affects the real-time is the RS-485 net.
In recent years, frequent accidents including collapse of the bridges bring about serious damages to human lives and property.
It is an important factor that affects signal processing ability, transferring efficiency and signal-noise ratio.
In this system, there are mainly three factors affecting the quality of the real-time: speed of liquid conduction, the speed of CPU and the speed of data transition.
So we can see that the decisive factor that affects the real-time is the RS-485 net.
Online since: January 2015
Authors: Victor Vasilyev, Yuri Stolbikhin
The first group of natural causes may include factors that arise naturally and cannot be eliminated.
The second and third groups comprise factors arising in performance of certain technological operations.
In view of the above, significant funds are allocated to fighting corrosion, which makes microbiological corrosion of reinforced concrete collectors a serious and costly problem affecting the sewage systems across the world.
Other causes of collector destruction are collector tray wear, mechanical damages to collector structures brought about by external factors and the impact of chemically aggressive effluents.
For measuring the contents and concentrations of gases and their physical properties, a measuring unit (6) is installed on spans with technological fittings (5).
The second and third groups comprise factors arising in performance of certain technological operations.
In view of the above, significant funds are allocated to fighting corrosion, which makes microbiological corrosion of reinforced concrete collectors a serious and costly problem affecting the sewage systems across the world.
Other causes of collector destruction are collector tray wear, mechanical damages to collector structures brought about by external factors and the impact of chemically aggressive effluents.
For measuring the contents and concentrations of gases and their physical properties, a measuring unit (6) is installed on spans with technological fittings (5).
Online since: January 2012
Authors: Abhay Kumar Jha, Parameshwar Prasad Sinha, Anil Kumar Jain, A.V. Alias
Owing to high carbon content, the mechanical strength and corrosion resistance of martensitic stainless steels are usually better in annealed state and further improve by hardening with solid-state phase transformation.
Case depth, micro hardness, geometry of heat-affected zone, microstructure, mechanical (strength, toughness or fatigue) and wear resistance largely depend in laser process parameters.
Along directional overlap factor Qf is calculated as Qf= [1-(V/f)/(S+VT)] [4] Where Vis process speed (scan rate in mm/sec), f is laser frequency in Hz, T is pulse duration in second, and S refers laser spot diameter to specimen in mm.
In the present study efforts has been made to maintain high overlapping factor for sample LTH1, LTH2 i.e. 93.2%, 93.7% by proper selection of above parameter.
Because of high degree of overlapping, it seems that laser treated area has uniform physical properties throughout the laser feed direction.
Case depth, micro hardness, geometry of heat-affected zone, microstructure, mechanical (strength, toughness or fatigue) and wear resistance largely depend in laser process parameters.
Along directional overlap factor Qf is calculated as Qf= [1-(V/f)/(S+VT)] [4] Where Vis process speed (scan rate in mm/sec), f is laser frequency in Hz, T is pulse duration in second, and S refers laser spot diameter to specimen in mm.
In the present study efforts has been made to maintain high overlapping factor for sample LTH1, LTH2 i.e. 93.2%, 93.7% by proper selection of above parameter.
Because of high degree of overlapping, it seems that laser treated area has uniform physical properties throughout the laser feed direction.
Online since: April 2021
Authors: Qin Xing, Zhong Xun Wang, Shu Ai Zhang, Bao Shan Liu, Gang Zhang
When the temperature is higher than 660 ℃, the mechanical properties of the aluminum alloy actuator decrease seriously.
According to the calculation range of centrifuge rotation speed, the filling amount and rotation time determined by preliminary test as factors, three factors and three levels orthogonal test was designed.
Preparation and properties of anodic oxidation wear-resisting and anticorrosive coating on aluminum alloy[D].
Laser cladding of Ni - based alloy on aluminum alloy surface and its tribological properties[D].
Aluminum borophosphate glaze-coated aluminum alloy substrate: Coating properties and coating/substrate coupling, Ceramics International[J], 2021, 47(2): 2050-2057
According to the calculation range of centrifuge rotation speed, the filling amount and rotation time determined by preliminary test as factors, three factors and three levels orthogonal test was designed.
Preparation and properties of anodic oxidation wear-resisting and anticorrosive coating on aluminum alloy[D].
Laser cladding of Ni - based alloy on aluminum alloy surface and its tribological properties[D].
Aluminum borophosphate glaze-coated aluminum alloy substrate: Coating properties and coating/substrate coupling, Ceramics International[J], 2021, 47(2): 2050-2057
Comparative Performance of Three High-Strength Ni-Cr-Mo Alloys in Oilfield Simulated H2S Environment
Online since: May 2014
Authors: Manuel Marya, Indranil Roy, David Susnitzky, Hong Qi Deng
Results & Discussion
In Figure 3 are summarized the mechanical properties of all three tested alloys at both ambient and test temperature.
Figure 3: Mechanical properties of the tested alloys at ambiant and at test temperatures.
Figure 5: Degradation of mechanical properties of 625Plus, 718 & 945X in the selected sour environment.
Mannan, Corrosion resistance and mechanical properties of a 140 ksi min alloy 945X for HPHT application, Corrosion, paper 0001393, (2012)
Karpenko, Effect of hydrogen upon the mechanical properties of steel [in Ukrainian] Izd.
Figure 3: Mechanical properties of the tested alloys at ambiant and at test temperatures.
Figure 5: Degradation of mechanical properties of 625Plus, 718 & 945X in the selected sour environment.
Mannan, Corrosion resistance and mechanical properties of a 140 ksi min alloy 945X for HPHT application, Corrosion, paper 0001393, (2012)
Karpenko, Effect of hydrogen upon the mechanical properties of steel [in Ukrainian] Izd.
Online since: September 2003
Authors: Xin Wei, Ha Llong Yuan, Z.H. Xie, Cheng Yong Wang
The formation of cracks or chipping and crushed zone depends on the properties of rocks.
The Factors Affecting the Formation and Propagation of Cracks in Diabase Cutting Process.
The cutting processes of coarse grain granite are more remarkably affected by the mineral properties.
The Properties of the Crushed Zone.
Effects of Mineral Properties on the Propagation of Microcracks.
The Factors Affecting the Formation and Propagation of Cracks in Diabase Cutting Process.
The cutting processes of coarse grain granite are more remarkably affected by the mineral properties.
The Properties of the Crushed Zone.
Effects of Mineral Properties on the Propagation of Microcracks.
Online since: January 2012
Authors: Jia Yu, Bo Ming Zhang, Jing Jie Cong
The plan-based methods, which require the generation of the manufacturing process plans, exploit more complicated relationship between product properties and manufacturing process.
It involves the manipulation of structural configuration and material properties at the same time.
Commonly the composite production needs to perform in a sequential operation and at least at one point of the production cycle where the material properties are defined. 2.
So evaluating the proposed design, from a manufacturing point of view, is not an easy task and involves several interrelated factors such as raw material properties, shape and size of the component, as well as the capabilities and limitations of the selected manufacturing processes.
Wu, “Effects of cure cycles on void content and mechanical properties of composite laminates,” Composite Structures, vol. 73, 2006, pp. 303-309
It involves the manipulation of structural configuration and material properties at the same time.
Commonly the composite production needs to perform in a sequential operation and at least at one point of the production cycle where the material properties are defined. 2.
So evaluating the proposed design, from a manufacturing point of view, is not an easy task and involves several interrelated factors such as raw material properties, shape and size of the component, as well as the capabilities and limitations of the selected manufacturing processes.
Wu, “Effects of cure cycles on void content and mechanical properties of composite laminates,” Composite Structures, vol. 73, 2006, pp. 303-309