Search results

Mechanical shearing resistance of polymers During actual injection, polymers need to undergo high speed shearing in pumps, valves, pipelines and near borehole zones.
Permeability is one of the most sensitive factors affecting the oil displacement efficiency
J. (2008) Analysis on injectivity and displacement property of polymer solution in low-middle layers of Daqing oil field.

Keratin is widely used in leather chemical materials [5], functional materials [6] and biomedical materials [7] due to its special physical and mechanical properties.
Karthikeyan et al. [9] used sodium silicate to modify keratin to produce keratin-silica retanning agent, which enhanced the physical and mechanical properties of leather and imparted antibacterial properties.
The differences of properties were caused by the addition of chitosan.
Obviously, the modified keratin was a good auxiliary with high properties.
It was been found that the use of chitosan modified keratin in an appropriate amount for filling can also improve physical and mechanical properties.

As a result, different seismic design methods have been proposed, mainly focused on the definition of behaviour / seismic force modification factors and capacity design rules [56,60,66–69].
In addition, also specific activities for the experimental evaluation of mechanical properties of cladding boards [84] and connections [85] were carried out.
The project was devoted to the development and demonstration of enhanced prefabricated lightweight CFS skeleton/dry wall constructions with improved thermal, seismic and fire performance, resulting from the inherent thermal, antiseismic and fire spread prevention properties.
Rogers, Development of seismic force modification factors for cold-formed steel strap braced walls, Can.
Manfredi, Mechanical Properties of Plasterboards: Experimental Tests and Statistical Analysis, J.

Simulation and Investigation on Exergy Destruction Distribution in Single-phase Heated Surfaces of Boiler under Transient Conditions Xiyan Guo1,a, Peng Fu1, Hui Xu2, Aijuan Li1 1School of Energy Power and Mechanical Engineering, North China Electric Power University, China 2School of Control and Computer Engineering, North China Electric Power University, China ag_x_y@163.com Keywords: Exergy destruction; transient condition; single-phase heated surfaces; boiler Abstract.
The physical parameters, related rate and partial derivative are evaluated by the water or steam thermodynamic property calculation program. 2 Model for metal control volume Since there is no inflow or outflow of fluid in metal control volume, mass equation is not considered.
Though the time-change, which has to be considered under transient conditions, may affects the energy distribution of heated surfaces, the exergy destruction of single-phase heated surfaces still depends on the temperature difference of surfaces and the heat, because of the fact that the exergy destruction under transient conditions is mainly affected by the two factors.
Though the product of hot and cold temperature in the process of heat transfer from metal to fluid is smaller, its impact is far less than the above factors.
The conclusions are summarized as follows: (1) Under transient conditions, the time rate of system parameters must be taken into account and the energy distribution will be affected, but the exergy destruction of single-phase heated surfaces is mainly determined by the temperature difference and the transferred heat because the exergy destruction of each process mainly depends on the temperature difference and the heat

And moreover, the weight and load also affect the container.
As Fig. 1 depicts, the whole length of the container is: l=4×[G1×1ρ1＋1.015 ρ2×η2＋3.980×η3 ρ3-Vs]π×d2＋ls＋lk Eq. 1 The level with the returning distillate is: h1=4×（1.015G1 ρ2×η2＋3.980G1×η3 ρ3-Vs）π×d2＋ls Eq. 2 Fig. 1 Structure diagram a) G1：Capacity of single sponge titanium stove, 12t b) ρ1，ρ2，ρ3：Densities of Ti, Mg，MgCl2 at 870℃~900℃, ρ1≈4.51t/m³,ρ2≈1.555t/m³, ρ3≈1.672t/m³ c) η2：Operating factor of Mg, η2=65% d) η3：Returning rate of MgCl2, η3=5% e) The oval in the bottom:long axis a=1.095m, minor axis b=0.6m=ls, h=2a=2.190m, the volume of the half oval, Vs=12V=12πabh=2.259m³ f) lk：The distance between the reaction surface and the head cover，0.6m The result is l=5500mm.
Fig. 3 Finite element model of the reduction container The mechanical properties of the materials are given in Table 1.
Table 1 Mechanical properties of the materials Material Name Young’s Modulus (N/m^2) Poisson’s ratio Density (kg/ m^3) Yield strength (N/m^2) Isotropic thermal conductivity Carbon steel(45#) 2.07E+11 0.31 7750 5.86E+08 43 Stainless steel (W18Cr4V) 2.07E+11 0.29 7750 5.86E+08 15.1 Results of the finite element analysis.

The ring-on-block tester produced by Jinan PuYe Electrical and Mechanical Technology Co, Ltd was used to perform the wear experiment, and its configuration is shown in figure 1.
After some time, oil-water stratification phenomenon appears due to their incompatibility which affects the wear of rubber in the mixture of crude oil with water[6-7].
At the same time, in the water-in-oil condition, property of the mixture presents as similar as that of crude oil, and the frictional coefficient is basic the same as that in the crude oil.
In the oil-in-water condition, property of the mixture presents as similar as that of pure water, the frictional coefficient is basic the same as in the pure water.
Research on Rheological Properties of W/O Emulsion[J].

Rapidly solidified aluminium (RSA) alloys have been identified among few materials suitable for optical applications due to its good optical and physical properties.
As a result of these good properties, RSA has been widely used for making mould inserts for optical plastic injection; and mirrors for opto-electronics, medical, defense, aerospace, and communications applications [6].
Tool nose radius may affect the surface roughness, residual stress and chip morphology [15, 16].
The nose radius was discovered to be a factor in the generation of strong cutting forces during the cutting operation.
Frontiers of Mechanical Engineering, 2017. 12(2): p. 158-180

High speed steels have a leading position in the group of tool materials today in regard to their special properties.
These properties are possible to be attained due to a special microstructure, composed of a matrix around 65 HRC and hard primary carbides, rich in molybdenum, tungsten and vanadium.
This may affect the material performance, but can be minimised by post thermal mechanical treatments, at a cost penalty.
A second pressing operation, repressing, can be done prior to sintering to improve the compaction and the material properties.
Zajac et al.: Computer aided in the machining technology, In: Cutting properties of new type of sintered cutting material, Scientific conference, Kosice (1995) 138 – 139

Such damage affects the safety of the bridge and can cause water infringement and other defects, directly shortening the service life of the structure.
Wang [1] performed a destructive test on a prestressed concrete slab bridge and reached the conclusion that the failure of concrete hinge joints was the major factor which led to the loss of structural integrity.
The analyses showed the less influence of the hinge concrete strength on the integral loading properties of bridge but the reduction of hinge concrete strength will decrease its tensile capacity and thus lead to the cracks along hinge joints.
Therefore, the value of the film’s elastic modulus directly affects the lateral load distribution of the bridge.
A comparison between the measured results and the model values shows that when the elastic modulus value of the film is approximately 0.75MPa, the force and deformation characteristics obtained by the model calculation are near the measured results, indicating that the results of the model may reflect the mechanical properties of the bridge.

The focus of recent studies are on different types of material, and also the structural properties of the conduits.
Fillers can be grouped into three categories: neruotrophic factors, protein cues and anisotropy.
Is has tailored mechanical properties and degradation profiles engineered to be complementary to those of the regenerating nerve.
Others are synthetic polymers, which are less biocompatible relative to biopolymers, but has tailored degradation, and control of mechanical strength, porosity, and microstructure properties.
Properties of CUPE nerve guidance conduits In the current study, CUPE fit some of the criteria of ideal conduit