Search results

Geological structure, especially fault, is one of the main factors resulted in water-inrush.
From space, the conductivity properties of a large fault change sharply along the direction and tendency.
It is important to note that the conductivity properties of fault, even the same fault, have significant differences along the strike and tendencies
Figure 3 Fault activation mechanical model The main factor of fault activation is the mining pressure which has changed the stress state.
References [1] Jing Cai Zhang,Tian Quan Liu, Analysis and Study of coal floor water bursting influencing factors, J.

Actually fatigue crack propagation including many factors of the material properties, geometric properties, load process and environmental conditions, etc., which are usually random[2].
As a result, the random fatigue crack propagation analysis methods and fatigue reliability evaluation considering various uncertain factors were also widely regarded by people.
These factors have greater uncertainty and randomness, being considered as random variables in crack propagation.
Because there are many factors naturally affecting ,, its distribution is unknown.
[3] Mingxiao Jiang, and Weiqiu Zhu: Mechanical Progress.

They affect the dimension stability, mechanical property, deformation and etc.
They affects the dimension stability, mechanical property, deformation and etc.
Above all, the errors mainly come from the experiment errors and material thermodynamic properties errors.
Improve the Full Length Quenched Rail Properties with Jetting Air Cooling[J].
Touloukian.Thermo-physical Properties of Matter [M].

Research on the Fatigue Life of Universal Mill Horizontal Roller Ring applying Fe-safe Yun-Feng Liu1,a,Xiao-Yong An1,b ,Shuang Zhou 2,c 1Inner Mongolia University of Science and Technology, Institute of Mechanical Engineering, Baotou, Inner Mongolia, China 014010 2 Rail and Beam Plant of Baotou Iron and Steel Group Co., Ltd.
A large number of production practice has proved that the main cause of the roller ring failure and affecting their life are cracks, fatigue damage and the peeling of the surface of the roller ring and these are closely related to the force status of the roller ring.Therefore,taking the combination factors such as temperature and load into account and establishing a mechanical model in line with the actual conditions to predict the fatigue life of the roll ring is of great significance to ensure smooth production and improve product quality.
Finite element analysis results,material fatigue properties and fatigue load spectrum are three preconditions to calculate the fatigue life using fe-safe.
The resulting material fatigue failure load cycles and material safety factor are solved in Fe-safe,which can be visually observed from the graphical analysis of the fatigue life by importing the calculation results into ansys post-processor.
Fig. 5 The fatigue life images of horizontal roller ring Summary The main factors of affecting the fatigue life of horizontal roller ring is thermal stress coming from temperature and contact stress coming from the rolling force by analyzing the failure modes and failure causes of roll ring.The paper estimate the fatigue life of roller ring under simulated conditions and the conclusion get is that rolling ring should stop working and grind the cracks on the surface when running 234 hours.This paper has a certain reference value to the time selection to change or grind the roller rings in actual production.

The fatigue life and degradation of their mechanical properties in service are needed to be essentially considered, it’s urgent to develop practical and effective sensors application in in-situ monitoring their stresses and/or strains.
Its exceptional properties make it potential candidate for lots of applications.
It is well-known that the main factors affecting the conductivity of a composite are the contact resistance and the number of conductive netlike pathways.
When Mmf stays between 2.0-3.0%, the counterpoise of two above factors contributes to the necessary numbers of conductive pathways and formation of tunneling-through meshwork of close but isolated MWNT fibers, the “sea island” chains of MWNT fibers isolated by cured epoxy film can trigger some fiber conductive pathways formation.
The strain-sensitive property of the MNTREP coating implies that in addition to reinforcing mechanical properties, this type of functional material presents the potential to provide real-time health monitoring and self-diagnostic functionalities to FRP structures.

The efficiency of the pile may be affected by the above situation.
The pile’s settlement in the vertical direction is the main factor considered in this paper.
The materials’ properties of soil and pile are different, what’s more, the soil can not withstand tensile stress or the tensile performance is poor.
The properties of the pile and soil materials.
The properties of the pile and soil materials are showed in the Table 1 and Table 2.

In combination with unfavorable factors (low temperature, metal hypoductility and an unsuccessful joint form) residual stresses lead to a decrease of load carrying capacity of a whole structure.
Studies have allowed us to establish the relationship between the structure and magnetic properties and to evaluate the feasibility of applying the Barkhausen noise method to welded structures.
Non-destructive testing methods are based on the relationship of physical properties and residual stresses [11,12,16-19].
The Barkhausen noise method is used for estimation of the surface residual stresses in aircraft bearings [20], for detection of grinding burns [21-23], for measuring the depth of the carburized case and other parameters of the structure that can affect the ferromagnetic properties of steel [24-25].
Vlasov, Effect of heat treatment conditions on structure and properties of high-speed steel, IOP Conf.

With the target of removing diesel from seawater, the influence of various factors on the laccase-catalyzed degradation process was discussed.
Numerous methods, such as mechanical collection, combustion and biological degradation, may be used in aquatic contaminants.
Laccase is a series of polyphenol oxidases which have similar but not identical property.
To investigate factors that could affect the diesel removal, reaction time, reaction temperature, the dosage of immobilized HRP and initial concentration of diesel in the oily wastewater were varied; pH of the reaction system was varied by phosphoric buffer solution.
This trend depends on the laccase lower substrate concentration decreased, and the resultant factors resulting in the inhibition of enzyme activity.

Considering loading property and material quality, the constraints are set up, including the property and boundary constraints.
Planetary gear should be separated from each other and non-interference, that is: 1 1 [sin( / ) 1] 2 4 0 k z u z π − + − > (4) Limit of the number of gear teeth, 117 40z≤ ≤ ; Limit of the module of gears: 2 8m≤ ≤ ; Limit of the face width factor: 5 / 17b m≤ ≤ . [4] Nonlinear Fitting of the Factors of Gear Variable paprameters of gear design is very many and also used to a variety of charts and graphs.
Programming these factors is very difficult, so the procedures of curves interpolation may be developed in BP neural network, and it is very convenient and effective.
Hou, Mechanical Design Optimization.China: Machinery Industry Press (2000) [2] Man Huitin, Theory and applying Simulated Annealing Algorithm.
[3] T.T.H.Ng, G.S.B.Leng, Engineering Applications of Artificial Intelligence, Department of Mechanical Engineering, National University of Singapore.

Moreover, factors such as the absorption coefficient, crushing factor, and gradation of particles exacerbate the negative effects on compressive strength (see Table 2).
Realizing that the rate of chloride ion entry into concrete depends on pore structure, which is influenced by factors such as mix design, use of supplementary cementitious materials, hydration process, curing conditions, and aggregate properties.
The focus here is on how the properties of crushed lightweight bricks and plastic waste affect chloride ion entry into sustainable lightweight concrete.
Agwa, Effect of air entraining and pumice on properties of ultra-high performance lightweight concrete, Archives of Civil and Mechanical Engineering 24.1 (2024) 1-19
Concrete: microstructure, properties, and materials.