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Online since: May 2011
Authors: Cheng Long Zhang, Ping Fa Feng, Zhi Jun Wu, Ding Wen Yu
It is also concluded that the effective cutting depth of diamond particles is the main factor for surface roughness in RUD of K9 glass.
However, it is one of the most difficult-to-machine materials due to its mechanical characteristics.
Illustration of the movement properties of rotary ultrasonic drilling: (a) The hybrid motion of the diamond particle; (b) z-axial direction movement principle.
As displayed in Fig. 2 (b), the effective machining depth of diamond particle in RUD is higher than the performance of diamond drilling at the same machining conditions that is inferred that the movement features of diamond particles in RUD process affect the machined surface quality.
It can be concluded that the effective cutting depth of diamond particles is the main factor for surface roughness in RUD of K9 glass.
However, it is one of the most difficult-to-machine materials due to its mechanical characteristics.
Illustration of the movement properties of rotary ultrasonic drilling: (a) The hybrid motion of the diamond particle; (b) z-axial direction movement principle.
As displayed in Fig. 2 (b), the effective machining depth of diamond particle in RUD is higher than the performance of diamond drilling at the same machining conditions that is inferred that the movement features of diamond particles in RUD process affect the machined surface quality.
It can be concluded that the effective cutting depth of diamond particles is the main factor for surface roughness in RUD of K9 glass.
Online since: October 2025
Authors: Riska Rachmantyo, Lia Amelia Tresna Wulan Asri, Richard Adventus Hutasoit
Other factors supporting this phenomenon include their relatively low price, light weight, and reasonable durability.
The main reason for this is that not all plastics have biodegradable and reactive properties.
The main factors influencing the increase in compressive strength of concrete are the physical and mechanical properties of the sand used.
This influences the mechanical properties of the aggregate such as higher stiffness, density, and crystallinity.
Pekmezci, Mechanical and physical properties and morphology of concrete containing plastic waste as aggregate, Constr Build Mater 257 (2020)
The main reason for this is that not all plastics have biodegradable and reactive properties.
The main factors influencing the increase in compressive strength of concrete are the physical and mechanical properties of the sand used.
This influences the mechanical properties of the aggregate such as higher stiffness, density, and crystallinity.
Pekmezci, Mechanical and physical properties and morphology of concrete containing plastic waste as aggregate, Constr Build Mater 257 (2020)
Online since: April 2011
Authors: Domenico Umbrello, Serena Di Renzo, Anshu Dhar Jayal, O.W. Dillon, I.S. Jawahir, Serafino Caruso
Introduction
The market is, nowadays, a scenario where the cost reduction and product quality factors become increasingly important to remaining competitive.
This difference in grain size was primarily due to severe plastic deformation and to the intense, localized, rapid thermal and mechanical loading to which the workpiece material was subjected during the cutting process [11-13].
In Figures 2 and 3 it is possible to evaluate the more influential parameter on grain size growth: while the constant α does not significantly affect the grain size (Figure 2), the exponent m has a stronger influence on the dynamic recrystallization (Figure 3).
“Heat-Affected Zones in Grinding Steel”, Annals of CIRP, Vol. 43(1) (1994) p. 279-282
Microstructure, Composition, Internal Stress, and Corrosion Properties”, Surface Engineering, Vol. 5(3) (1989) p. 229-233
This difference in grain size was primarily due to severe plastic deformation and to the intense, localized, rapid thermal and mechanical loading to which the workpiece material was subjected during the cutting process [11-13].
In Figures 2 and 3 it is possible to evaluate the more influential parameter on grain size growth: while the constant α does not significantly affect the grain size (Figure 2), the exponent m has a stronger influence on the dynamic recrystallization (Figure 3).
“Heat-Affected Zones in Grinding Steel”, Annals of CIRP, Vol. 43(1) (1994) p. 279-282
Microstructure, Composition, Internal Stress, and Corrosion Properties”, Surface Engineering, Vol. 5(3) (1989) p. 229-233
Online since: February 2012
Authors: Dong Xiao Zhang, Peng Li He
Through the establishment of the shaft lining automatic monitoring system, the mechanical state of shaft can be effectively analyzed and the overall safety can be valuated.
At the same time, the settlement layers affect the additional force on the shaft lining outside surface, which is the main factor causing the fracture of the shaft lining [1-3].
On the other hand, human factors influence is bigger.
Fig. 1 Software system diagram The application of automatic remote shaft lining monitoring system The vertical additional stress is uneven distribution along the depth of the shaft liner of, and it has closely related to the position of the aquifer, thickness, soil properties and precipitation rate, so accurately measure the size of the additional force and the variation law is very difficult.
At the same time, the settlement layers affect the additional force on the shaft lining outside surface, which is the main factor causing the fracture of the shaft lining [1-3].
On the other hand, human factors influence is bigger.
Fig. 1 Software system diagram The application of automatic remote shaft lining monitoring system The vertical additional stress is uneven distribution along the depth of the shaft liner of, and it has closely related to the position of the aquifer, thickness, soil properties and precipitation rate, so accurately measure the size of the additional force and the variation law is very difficult.
Online since: October 2014
Authors: Zambri Harun, Wan Mohd Faizal Wan Mahmood, Lok Bee Seng, Muhammad Ahmar Zuber, Zulkhairi Zainol Abidin
Interpolation Techniques in Computational Particle Tracking Inside a Direct-Injection Diesel Engine Cylinder
Lok Bee Seng1,a, Muhammad AhmarZuber1,b,
Wan Mohd Faizal Wan Mahmood1,2,c, Zulkhairi Zainol Abidin1,2,d
and Zambri Harun1,2,e
1Department of Mechanical and Materials Engineering, Faculty of Engineering and Built
Environment, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia
2Centre for Automotive Research, Faculty of Engineering and Built Environment,
Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia
abichen1989@hotmail.com, bahmarzuber@yahoo.com, cwmfaizal@eng.ukm.my,
dzza@eng.ukm.my, ezambri@eng.ukm.my
Keywords: Soot, particle tracking, interpolation, trilinear, radial basis function.
Movement of soot particles are examined through the selection factors of particle's initial coordinate (r,Ɵ,z) and soot concentration level at different instant crack angle.
It has been used widely nowadays in automotive field since it has a better fuel efficiency property compared to gasoline engine but it has drawback such as the formation of soot and other pollutants [1].
It happens since interpolation technique computes its result which is affected by the parameter value on the previous time-step where RBF and trilinear interpolation takes on the different value on the related parameter.
By knowing the properties and movement tendency of soot particles, solution to minimize or even control the tendency of soot particles to stick on cylinder wall will have a higher successful probability.
Movement of soot particles are examined through the selection factors of particle's initial coordinate (r,Ɵ,z) and soot concentration level at different instant crack angle.
It has been used widely nowadays in automotive field since it has a better fuel efficiency property compared to gasoline engine but it has drawback such as the formation of soot and other pollutants [1].
It happens since interpolation technique computes its result which is affected by the parameter value on the previous time-step where RBF and trilinear interpolation takes on the different value on the related parameter.
By knowing the properties and movement tendency of soot particles, solution to minimize or even control the tendency of soot particles to stick on cylinder wall will have a higher successful probability.
Online since: February 2011
Authors: Feng Li, Xiao Chen, Ren Yuan Zhang
The main constituents of coatings remain invariant and the coatings have excellent properties of bond strength and thermal shock resistance.
Heat collection, heat storage and evapour production are the main factors in the system of solar thermal power generation.
MoB/CoCr coatings have properties of good corrosion resistance, heat resistance and wear resistance in the aluminum alloy [5,6].
Also, structures and properties of coatings are studied.
And there also existed certain mechanical bond between bond coating and substrate.
Heat collection, heat storage and evapour production are the main factors in the system of solar thermal power generation.
MoB/CoCr coatings have properties of good corrosion resistance, heat resistance and wear resistance in the aluminum alloy [5,6].
Also, structures and properties of coatings are studied.
And there also existed certain mechanical bond between bond coating and substrate.
Online since: January 2012
Authors: Rosario A. Gerhardt, Ricky L. Whelchel, Ken C. Littrell
Introduction
Nickel-base superalloys are used in both land and air-based gas turbine engines, due to their superior high temperature mechanical properties.
The distribution of precipitates will evolve with processing or with thermal exposure in the gas turbine engine, resulting in corresponding changes to the alloy mechanical properties.
It is therefore desirable to non-destructively monitor this evolution in the precipitate phase, so that the mechanical properties of gas turbine engine components might also be monitored in the future.
The geometric correction factors used to convert the resistance values to resistivity are described elsewhere [8].
Volume distributions of the g’ phase were fit to the measured SANS intensity by assuming spherical particles and a hard sphere model for the structure factor.
The distribution of precipitates will evolve with processing or with thermal exposure in the gas turbine engine, resulting in corresponding changes to the alloy mechanical properties.
It is therefore desirable to non-destructively monitor this evolution in the precipitate phase, so that the mechanical properties of gas turbine engine components might also be monitored in the future.
The geometric correction factors used to convert the resistance values to resistivity are described elsewhere [8].
Volume distributions of the g’ phase were fit to the measured SANS intensity by assuming spherical particles and a hard sphere model for the structure factor.
Online since: September 2015
Authors: Jiří Bydžovský, Tomáš Melichar, Ámos Dufka
When a concrete-steel construction is affected some elements may completely loose their bearing capacity resulting in possible collapse of the construction.
Trouble-free matrix-aggregates contact zone is one of the key factors for preservation of particular material parameters and thus whole construction bearing capacity.
Basic physical and mechanical characteristics were monitored in the age of 28, 45 and 90 days.
To obtain good workability of the fresh mixture with provision of sufficient physical and mechanical parameters was the objective.
The proposed formulas can be evaluated very positively when using the preparation of mixing matrix and combination of both aggregate types with application of support admixture and scattered reinforcement parameters exceeding properties of common maintenance materials were obtained.
Trouble-free matrix-aggregates contact zone is one of the key factors for preservation of particular material parameters and thus whole construction bearing capacity.
Basic physical and mechanical characteristics were monitored in the age of 28, 45 and 90 days.
To obtain good workability of the fresh mixture with provision of sufficient physical and mechanical parameters was the objective.
The proposed formulas can be evaluated very positively when using the preparation of mixing matrix and combination of both aggregate types with application of support admixture and scattered reinforcement parameters exceeding properties of common maintenance materials were obtained.
Online since: May 2014
Authors: Guo Qiang Sun, Zhi Yong Yang, Jian Xiong Liang, Zhen Bao Liu, Xiu Li Zhang
Furthermore, it was indicated that the steel also presents high fatigue properties and good high-temperature mechanical properties.
In this paper, the strengthening phase, the typical mechanical properties and corrosion resistance properties of the new developed steel were demonstrated and the application prospects and use value of the steel were evaluated comprehensively. 2.
The mechanical properties measurement was carried out in accordance with ASTM E8 and ASTM A370 standard.
Results and discussion 3.1 Mechanical properties Fig. 2 shows the effects of aging temperature on the mechanical properties of steel.
Figure 2 Mechanical properties of USS122 steel, (a) effects of aging temperature on the mechanical properties, (b) the typical relationships between the strength and fracture toughness 3.2 Fatigue property and high-temperature property Fig.3(a) gives the fatigue properties and high temperature tensile properties obtained from the sample with tensile strength of 1960 MPa.
In this paper, the strengthening phase, the typical mechanical properties and corrosion resistance properties of the new developed steel were demonstrated and the application prospects and use value of the steel were evaluated comprehensively. 2.
The mechanical properties measurement was carried out in accordance with ASTM E8 and ASTM A370 standard.
Results and discussion 3.1 Mechanical properties Fig. 2 shows the effects of aging temperature on the mechanical properties of steel.
Figure 2 Mechanical properties of USS122 steel, (a) effects of aging temperature on the mechanical properties, (b) the typical relationships between the strength and fracture toughness 3.2 Fatigue property and high-temperature property Fig.3(a) gives the fatigue properties and high temperature tensile properties obtained from the sample with tensile strength of 1960 MPa.
Online since: January 2017
Authors: Ya Quan Xin, Ling Li, Li Yuan Fan
Introduction
Epoxy resin (EP) were widely used in electric devices owing to their good dimensional stability , chemical resistance, electrical insulation and excellent mechanical properties.
Through on the rheological properties of the resin matrix can predict the viscosity of the resin system changes during the curing process.
Zou et al[3]. reported that applied the ANN to simulate the mechanical properties of the composite foam.
Sun et al[4]. has finished the work about predict the mechanical properties of wood composite with application of ANN.
In the initial stage of the reaction ,the cuing degree is low, the temperature is the main factors influence in the system viscosity.
Through on the rheological properties of the resin matrix can predict the viscosity of the resin system changes during the curing process.
Zou et al[3]. reported that applied the ANN to simulate the mechanical properties of the composite foam.
Sun et al[4]. has finished the work about predict the mechanical properties of wood composite with application of ANN.
In the initial stage of the reaction ,the cuing degree is low, the temperature is the main factors influence in the system viscosity.