Search results

In recent years, textile fabric composites have been widely investigated because they offer a variety of structural applications, lower production cost and improvement of mechanical properties in the through the thickness direction.
The compaction behaviour of fabric preform has significant effects on process ability in terms of the permeability and compressibility of preform, and on the quality and mechanical properties of final product.
This has effects on process ability by altering the permeability of the reinforcement to resin flow and on the mechanical properties of the composite product.
Variation of the fabric thickness can affect the optical quality of the glass.
Deformation structure influences on the variation of the thickness dry textile but also properties of final composites.

Comparing the material properties of cement based composites such as concrete and cement-bonded particleboards, significant difference is evident.
Presence of glucose leads to the strength reduction of cement by affecting temperature and hydration process.
Content of any of these undesirable substances in raw materials, which form the composite system of the material, may have adverse effects that can lead to deterioration of wide range of the final material properties.
Possibilities of actuation on "wood sugar" (chemical and biological factors).
Studies on the characterisation of Biosealant properties of Bacillus sphaericus.

Four different ram speeds were applied to realize how the shape and position of intermediate section would be affected.
The properties of extrusion products are affected greatly by the way in which the metal flows during the extrusion process.
The metal flow is influenced by several factors such as the size of billet (length and diameter), the temperature of billet and container, the extrusion ratio, ram speed, and the material flow stress.
Qamar et al. [13] demonstrated that optimization of metal flow is crucially important in both design and manufacture as it directly affects extrusion speed on one hand, and mechanical properties and surface finish of the extruded product on the other hand.
The position and size of the intermediate section will be affected by altering the strain rate of extrusion process.

Broken teeth as a key vulnerability crusher parts, its wear resistance directly affect the productivity and life.
resistance Comprehensive analysis of alloying elements and heat treatment on properties of materials, improved formulation and production process 4.
(2) Steel C, Mn content increased, the hardness increased, decreased impact toughness, in which the greatest influence Mn, C second; Si, MO less influence on the properties of steel are in the middle of obtaining the performance levels the best value.
(3) After testing the mechanical properties obtained material after 870 × 1.5h with the oven cold +880 × 1.5h oil quenched +250 × 2h annealing, the hardness of HRC45, impact toughness = 40J/cm2, Field Application broken tooth can completely meet the application's working conditions.
Modern Casting，Marehl990 [3]Delia.A.et.al Effect of austenitizing conditions on the impact properties of an alloyed austempered ductile iron of initially ferritic matrix Structure[J].Damage Mech，1998，7(2):103～128

At present, the structure of the aerodynamic measures by wind resistance, structural measures and measures to improve the mechanical, aerodynamic measures were used without changing the bridge structure and properties of the bridge under the premise of changing the shape of an appropriate arrangement or increase the number of diversion devices, such as the installation of nozzle, plate, stabilizer, etc.
Specification by the wind we can see into the bridge operating in the state, Stiffening girder design basis wind speed (1) Specification by the wind to know the main beam flutter wind speed is determined by testing (2) Where:K - consider the wind tunnel test and design errors, construction of uncertainty factor of safety, K = 1.2 μf - consider the fluctuation of wind speed and level of correlation of dimensionless correction factor.
Truss width increase is a more effective measures to improve the suspension bridge wind resistance, but the increase will not only greatly improved truss wide cost, and the suspension bridge would adversely affect the overall landscape effect.
Set to increase cross-cable suspension bridge oblique wind resistance of the measures, although relatively new practice, but the effect is not very good, also the overall landscape effect on the suspension bridge adversely affect.
Use of space cable, cable length and the girder through the top width of the size of the calculated comparison, the top cable from the 1m, 14m boom width at the time to reach the best results, do not only improve the bridges wind resistance, without affecting the cost, but also improve the landscape effect, the other, the use of space or the first main cable in China, such practices on the design and construction of suspension bridge technology also played a certain role.

Silicon carbide (SiC) is widely used in terrestrial and space applications because of its good mechanical, thermal and optical properties.
The input power and processing time are the two main influence factors on the processing temperature.
Introduction Owing to the excellent mechanical, thermal and optical properties such as high specific stiffness (high stiffness and low density), low thermal expansion, high thermal conductivity as well as high radiation resistance, SiC has long been recognized as an ideal material for both optics and structural assemblies in terrestrial and space applications [1].
Single factor method is adopted to study on the effect of different parameters on removal rate and temperature.
Prolonged temperature rise will certainly affect the linear trend of removal depth, thus, in the actual machining process, the residence time at a fixed point should not be too long.

Factors affecting SiAlON powder production were temperature, holding time, gas-flow rate and preparation methods.
Introduction The silicon nitride and the compounds on its base, in particular, SiAlON, have a complex of unique physical-chemical properties.
They possess good mechanical properties such as high strength and high fracture toughness.

The form and structure of a building not only depend on the designer's subjective factors, but also depend on the actual and various objective factors: including the application of the building, form and requirements; the surrounding environment and concrete requirements of department of city planning; need to consider the economic inputs, select appropriate materials and construction techniques, besides, a building's form and structure will be affected by the tastes of different investors and users and different local historical and cultural tradition.
In fact, as the social development, there are more and more complex factors that can influence the design thinking.
Therefore, architectural design can be seen as the architect seeking the best balance in the complex network composed of various factors.
The necessary conditions for the birth of a good work is to achieve the most reasonable value on the whole after considering all factors rather than emphasizing a factor and overlooking other factors.
Facing of the complex network of architectural design, the architects must adopt the scientific methodology of complexity science: not only have profound understanding of the various properties of parts, but also grasp the overall macro level integrated; thinking logically thinking as well as non-logically.

Effect of Speed on the Wear Behavior of FKM/NBR Blends under Dry Sliding Yuzeng Zhang1, 2, a, Mingyin Yan1, b, Shijie Wang1, Xiaoren Lv1, Rui Nie1 1School of Mechanical Engineering, Shenyang University of Technology, Shenyang, China 2 School of Mechanical Engineering, Shenyang Ligong University, Shenyang, China aZhangyuzeng2010@126.com, bymy_s@yahoo.com.cn Keywords: FKM/NBR blends, Speed, Wear behavior, Dry sliding, Progressing cavity pump.
Introduction The speed of progressing cavity pump (PCP) is one of the key factors in PCP oil production system.
The choice and control of speed is very important, and the improper selection of speed would affect the pump efficiency and service life [1-2].
Surface morphology of NBR The above results show that the frictional heat is the key factor in the dry sliding, which can affect the transfer of wear mechanism.
An investigation of mechanical and rheological properties of NBR/PVC blends: influence of anhydride additives, mixing procedure and NBR form.

Since time is the most important factor in the study of viscoelastic material, creep and stress relaxation functions are very important.
While factors such as aging, amplitude and frequency of loading, and temperature do affect conditioning and degradation of the material over time, they were not considered in this study.
The relation is expressed in terms of a force relaxation function, which is the main viscoelastic property.
From a lot of numerical experiments for the proposed nonlinear viscoelastic model, it was found that deformation affected nonlinearity strongly and the data for the viscoelastic bushing model was obtained.
Shi: International Journal of Mechanical Sciences Vol. 40 (1998), p. 1295 [4] S.