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Online since: August 2020
Authors: Asaad M. Rabee, Waseem Haleem Al-Baghdadi, Mohammed Sh. Mahmood, Suhad Abdulsattar Almahbobi
Three factors render the Soil shear strength into a probabilistic problem: inherent uncertainties in the geotechnical parameters, model performance and finally human uncertainty [4].
There is a growing body of literature that recognizes the importance of soaking effect on soil properties alteration.
The soil properties are not considered unvarying during structures life [13].
The properties of soil used.
Statistical analysis of some geotechnical properties of Najaf city.
There is a growing body of literature that recognizes the importance of soaking effect on soil properties alteration.
The soil properties are not considered unvarying during structures life [13].
The properties of soil used.
Statistical analysis of some geotechnical properties of Najaf city.
Online since: November 2017
Authors: Galina Ilieva Ilieva
Flow through turbine stages is three-dimensional and highly complex due to secondary flows, axial and tip clearances, 3D blades, rotational effects, varying fluid properties, turbulence effects, boundary layer development, etc.
Fluid physical properties are as follows: density is varying with the ideal gas law, viscosity is 0.0000134 kg/m.s, thermal conductivity is 0.02161 W/m.K, specific heat capacity is 2.014 kJ/kg.K The boundary zones that were setup are “pressure inlet”, “pressure outlet”, “periodic”, “wall” and “fluid”.
Due to strong non-linear equations, unsteady solution, separation and other aerodynamic effects, the solution is unstable; that is why a set of relaxation factors is used to remove the steep oscillations.
For all under-relaxation factors, calculations were performed with initial values that were equal to the default values included in FLUENT.
All relaxation factors and discretization schemes, as well as the approaches to overcome different divergence problems and access convergence, are described and discussed in more details in [52,53].
Fluid physical properties are as follows: density is varying with the ideal gas law, viscosity is 0.0000134 kg/m.s, thermal conductivity is 0.02161 W/m.K, specific heat capacity is 2.014 kJ/kg.K The boundary zones that were setup are “pressure inlet”, “pressure outlet”, “periodic”, “wall” and “fluid”.
Due to strong non-linear equations, unsteady solution, separation and other aerodynamic effects, the solution is unstable; that is why a set of relaxation factors is used to remove the steep oscillations.
For all under-relaxation factors, calculations were performed with initial values that were equal to the default values included in FLUENT.
All relaxation factors and discretization schemes, as well as the approaches to overcome different divergence problems and access convergence, are described and discussed in more details in [52,53].
Online since: July 2011
Authors: Ge Liu, Lang Huang, Bin Chen, Xian Ming Zhang
Thus air and droplet deformation control volume corresponding coupling the continuity equation and equations of motion were obtained through using of mass, momentum conservation principle, most unstable wave number and the droplet growth rate of expression was exported under disturbance waves in the air, the vibration characteristics of the HVAS droplet were analyzed with coupled vibration model, HVAS process parameters on droplet characteristics was discussed, which the process is important theoretical significance for reasonable choice of materials and control of HVAS.
1 The coupling vibration equation for high velocity arc spraying process
Spraying molten droplet formation process affected by many factors, such as the arc temperature areas, air velocity, air pressure, body temperature, spraying the atmosphere and so on.
By formula (15) and make it equal to 0 the derivative, the most unstable wave number: (16) 3 Model Validation Assume the role of high nitrogen liquid metal under the coating of titanium used to set the initial speed of high-speed ,HVAS the corresponding parameters into the mathematical model, Solver written using MATLAB, you can get nitrogen on liquid titanium with high-speed spray disturbance wave number and the relationship between growth factors.
Draw the nitrogen for high-speed spraying of liquid titanium disturbance wave number and the relationship between growth factors shown in Figure 1.
(3) Impact droplets vibration characteristics with different spraying molten Different wire coating have different physical properties, Figure 6 shows the change of vibration characteristics of droplets during spraying Nickel, Titanium and Aluminum at the initial velocity with the 200m / s of the N2 gas.
Mechanical Engineering, Vol. 41 (2005), p.169一173
By formula (15) and make it equal to 0 the derivative, the most unstable wave number: (16) 3 Model Validation Assume the role of high nitrogen liquid metal under the coating of titanium used to set the initial speed of high-speed ,HVAS the corresponding parameters into the mathematical model, Solver written using MATLAB, you can get nitrogen on liquid titanium with high-speed spray disturbance wave number and the relationship between growth factors.
Draw the nitrogen for high-speed spraying of liquid titanium disturbance wave number and the relationship between growth factors shown in Figure 1.
(3) Impact droplets vibration characteristics with different spraying molten Different wire coating have different physical properties, Figure 6 shows the change of vibration characteristics of droplets during spraying Nickel, Titanium and Aluminum at the initial velocity with the 200m / s of the N2 gas.
Mechanical Engineering, Vol. 41 (2005), p.169一173
Online since: February 2012
Authors: Ping Fa Feng, Zhi Jun Wu, Jian Fu Zhang, Ding Wen Yu, Cheng Long Zhang
The model of material removal for RUFM was developed through examining indentation fracture mechanics theory and material removal characteristics of brittle materials, and analyzing kinematics properties of diamond grits in RUFM.
However, because of its mechanical characteristics, it is one of the most difficult-to-cut materials [1].
ZHOU et al.[10] reported that cutting force is an important factor affecting the size of the stress field exerting at the work material beneath the tool tip and the scale of deformation.
The material removal model for RUFM of brittle material processing by diamond tool was presented through examining indentation fracture mechanics theory and material removal features of brittle materials, and analyzing kinematics properties of diamond grains.
However, because of its mechanical characteristics, it is one of the most difficult-to-cut materials [1].
ZHOU et al.[10] reported that cutting force is an important factor affecting the size of the stress field exerting at the work material beneath the tool tip and the scale of deformation.
The material removal model for RUFM of brittle material processing by diamond tool was presented through examining indentation fracture mechanics theory and material removal features of brittle materials, and analyzing kinematics properties of diamond grains.
Online since: April 2021
Authors: G.A. Harmain, Chandra Kant
The affecting factors are initial crack length, crack propagation and mean stress.
These factors make the fatigue crack propagation prediction tedious.
· Others are based on the mechanical properties which are easier to use as parameter calculation is deterministic.
Songlin, Changes in mechanical properties of vehicle components after strengthening under low-amplitude loads below the fatigue limit, Fatig.
Morrow, Fatigue properties of metals in Fatigue Design Handbook, Society of Automotive Engineers, Warrendale, Pa, USA, AE-4 (section 3.2) (1968) 21-29
These factors make the fatigue crack propagation prediction tedious.
· Others are based on the mechanical properties which are easier to use as parameter calculation is deterministic.
Songlin, Changes in mechanical properties of vehicle components after strengthening under low-amplitude loads below the fatigue limit, Fatig.
Morrow, Fatigue properties of metals in Fatigue Design Handbook, Society of Automotive Engineers, Warrendale, Pa, USA, AE-4 (section 3.2) (1968) 21-29
Online since: June 2010
Authors: María F. Mora, Laura E. Valenti, Carlos D. García, Carla E. Giacomelli
The discussion is focused on the consequences of the adsorption process on the structure and
properties of both proteins and CNTs.
Although CNTs are not especially reactive, their hydrophobic character and good surface to area ratio provide very good physisorption properties.
The idea behind this growing research interest is to obtain novel nanomaterials with unique mechanical, electrical, optical, thermal, and molecular recognition properties to be applied in advanced biosensors and drug delivery systems.
The polymer layer protects the nanotubes from protein adsorption due to many factors such as steric repulsion, hydration, and solvent structuring at the surface.
Single-walled carbon nanotubes can be characterized by two integers (n and m) that determine its diameter and electronic properties.
Although CNTs are not especially reactive, their hydrophobic character and good surface to area ratio provide very good physisorption properties.
The idea behind this growing research interest is to obtain novel nanomaterials with unique mechanical, electrical, optical, thermal, and molecular recognition properties to be applied in advanced biosensors and drug delivery systems.
The polymer layer protects the nanotubes from protein adsorption due to many factors such as steric repulsion, hydration, and solvent structuring at the surface.
Single-walled carbon nanotubes can be characterized by two integers (n and m) that determine its diameter and electronic properties.
Online since: June 2025
Authors: Purwo Kadarno, Suharti Suharti, Fatwa Khoirrun Nadhor, Sri Hastuty, Muhammad Akbar Barrinaya, Arianta Arianta, Ranny Adriana, Fauzan Fadhlurrahman
Among the various materials used in industrial applications, aluminum, particularly Aluminum, is notable for its high corrosion resistance and lightweight properties[1], [2].
Its lightweight and weather-resistant properties benefit aircraft manufacturing and architectural applications, such as roofing, siding, and curtain walls.
Overall, Aluminum is a cost-effective alloy offering a combination of properties that suit various engineering applications[3].
The material's performance under stress, particularly stress corrosion cracking (SCC), is a critical factor that requires thorough investigation.
Ashby, Engineering materials 1: An introduction to properties, applications and design.
Its lightweight and weather-resistant properties benefit aircraft manufacturing and architectural applications, such as roofing, siding, and curtain walls.
Overall, Aluminum is a cost-effective alloy offering a combination of properties that suit various engineering applications[3].
The material's performance under stress, particularly stress corrosion cracking (SCC), is a critical factor that requires thorough investigation.
Ashby, Engineering materials 1: An introduction to properties, applications and design.
Online since: September 2008
Authors: B. Culshaw
In the most ideal of ideal worlds the structure itself is mechanically
adaptive so that its properties can change or indeed it can heal itself in response to loading and
operational conditions (Fig. 1).
There are other factors which influence the prospects for the Smart Bridge.
This will have responsive mechanical properties.
In essence the relationship between sensor outputs and structural properties must be assessed as some form of probability function rather than a one to one deterministic problem.
These social costs have affected every single one of us on an almost routine basis.
There are other factors which influence the prospects for the Smart Bridge.
This will have responsive mechanical properties.
In essence the relationship between sensor outputs and structural properties must be assessed as some form of probability function rather than a one to one deterministic problem.
These social costs have affected every single one of us on an almost routine basis.
Online since: March 2020
Authors: Ikram El Abbassi, Cheikh Sidi Ethmane Kane, A. Moumen Darcherif, Mamoudou Ndongo, Labouda Ba
Polymers such as polyester resins and polypropylenes were added to the fibers to strengthen their mechanical properties [16].
The study of the structural and mechanical properties of Typha was carried out by J.
Slah, Study of Structure and Properties of Tunisian Typha Leaf Fibers.
Hema Chandra Reddy, Mechanical Properties and Thermal Conductivity of Typha angustifolia Natural Fiber–Reinforced Polyester Composites.
[43] J.Liu, Z.Zhang, Z.Yu, Y.Lianga, X.Lia, L.Rena, Experimental study and numerical simulation on the structural and mechanical properties of Typha leaves through multimodal microscopy approaches.
The study of the structural and mechanical properties of Typha was carried out by J.
Slah, Study of Structure and Properties of Tunisian Typha Leaf Fibers.
Hema Chandra Reddy, Mechanical Properties and Thermal Conductivity of Typha angustifolia Natural Fiber–Reinforced Polyester Composites.
[43] J.Liu, Z.Zhang, Z.Yu, Y.Lianga, X.Lia, L.Rena, Experimental study and numerical simulation on the structural and mechanical properties of Typha leaves through multimodal microscopy approaches.
Online since: August 2013
Authors: Guang Hui Zhang
Introduction
It is shown by a number of seismic surveys that due to economic backwardness, disqualified construction material, traditional building structure adverse to seismic resistance, and lack of knowledge about seismic resistance, current rural buildings in China are seldom fortified against earthquake, or poorly fortified, resulting in the situation that under the same failure condition of seismic intensity, the seriousness of casualties and building collapse in rural area is much higher than that in urban area, and the poorer the region is, the more seriously it is affected.
Their basic principle of sliding isolation can be analyzed successively based on general mechanical relationship.
Reflected by the general mechanical relationship, it is certainly impossible to establish direct correspondence between the acceleration measured in test and the actual friction.
Zhu Jungao et al. firstly put forward the concept of foundation isolation; Liu Xiaoli et al. conducted study on the impact of gravel cushion thickness and base pressure on the ground seismic response; Dou Mingyuan, Zhao Shaowei, Liu Darong et al. researched the impact of such factors as cushion thickness and particle size on the performance of seismic isolation through the shaking table test of gravel cushion.
Mao Shangli et al. think stratified layer can be formed at building base through replacement of sand, and the seismic wave will be reflected and refracted by the media of upper and lower soil foundation interfaces of different mechanical properties; such resilient interfaces don’t only change the geometric path of wave propagation, but will redistribute the energy of wave field.
Their basic principle of sliding isolation can be analyzed successively based on general mechanical relationship.
Reflected by the general mechanical relationship, it is certainly impossible to establish direct correspondence between the acceleration measured in test and the actual friction.
Zhu Jungao et al. firstly put forward the concept of foundation isolation; Liu Xiaoli et al. conducted study on the impact of gravel cushion thickness and base pressure on the ground seismic response; Dou Mingyuan, Zhao Shaowei, Liu Darong et al. researched the impact of such factors as cushion thickness and particle size on the performance of seismic isolation through the shaking table test of gravel cushion.
Mao Shangli et al. think stratified layer can be formed at building base through replacement of sand, and the seismic wave will be reflected and refracted by the media of upper and lower soil foundation interfaces of different mechanical properties; such resilient interfaces don’t only change the geometric path of wave propagation, but will redistribute the energy of wave field.