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The reduction in mechanical strength of rubberized concrete is commonly attributed to three primary factors.
Other factors, including the viscosity of the concrete mix, mixing methods, and fiber volume fraction (FVF), also influence the degree of fiber distribution.
Additionally, the distinct chemical nature of CR compared to conventional aggregates results in poor adhesion with the cement paste, negatively affecting the development of mechanical strength.
The indices Ni and Nf were thus earmarked as the initial and final crack resistance factors, respectively.
Mechanical properties of sustainable ultra-high-strength concrete incorporating recycled gravel and steel fibers.

Mechanical Properties of Rammed Earth Stabilized with Local Waste and Recycled Materials E.
Conclusions The use of wool fibers and citrus pomace as additives in mixtures to be used with rammed earth give the possibility to influence physical and mechanical properties of final aggregates.
Physical, mechanical and durability properties of soil building blocks reinforced with natural fibres.
Hygro-Thermo-Mechanical Properties of Earthen Materials for Construction : a Literature Review.
Major Fibers and Their Properties, in: Tufted Carpet.

The steering knuckle is the important component of vehiles, and its forming, mechanical properties and mechanical processing technology et al. are focused by scholars home and abroad, such as optimization calculat ion of the steering knuckle structure of vehicle based on genetic algorithm and MAT LAB-ADAMS[5] and Multi-objective optimization design of resistance wall structure in knuckle hot extrusion dies[6].
Its structure is optimized based on the mechanical model.
Establishment of the equivalent mechanical model of the drilling fixture of the steering knuckle The clamping and drilling precision is affected by the fixture stiffness.
Three optimization factors are as shown in Table 1.
Fig. 4 Geometric model of the fixture Fig. 5 The finite element model of the fixture Table 1 Three optimization factors of the fixture Optimization object The fixture volume (VTOT) Constraint conditions m Design variables Optimization process and the analysis of optimization results.

And then, using the MATLAB language, the properties of ILE material are optimized to simulate the bolted-joint interface stiffness.
The material properties parameters are identified by using experimental data.
Introduction Modern mechanical system is often assembled together with various components, parts and units, and bolted-joint is one of the most widely used connection[1].
However, in the whole mechanical system dynamic characteristics analysis, because of the behaviour of joints between each parts significantly affects the dynamics response of the structure, how to properly handle the interface connection problem between parts is a key technology for improving the calculation precision[2].
Presently, domestic researchers add an additional surface between face-to-face contact bolted-joint models, and through optimizing the additional surface material properties to simulate the actual stiffness[3], but it only optimizes one parameters, so the results have a large deviation.

Shell is a natural composite material with excellent mechanical property. it is a model of biomimetic composites.
A great deal of attention has been paid to its excellent mechanical properties by material scientists [4-8].
Different layers of shell have different structure, so mechanical properties are anisotropy.
In addition, the lathy fibre cluster in the middle layer, staggered arrangement of angle-shaped fibre cluster in inner layer and its laying angle are key factors to increase compression and impact of the scallop shell, thus the destroy of the scallop shell is small.
The rectangular fibre cluster in the middle layer, staggered arrangement of angle-shaped fibre cluster in inner layer and its laying angle are key factors to increase compression and impact of the scallop shell, thus the destroy of the scallop shell is small.

To sum up, because of many factors affect rock burst,So far it is about its formation mechanism of knowledge has not unified.The mechanism of rock burst from mechanical characteristics in terms of research can be divided into the statics mechanism and kinetics mechanism.Judging from the rock burst damage form into shear failure and tension destruction.
From that strength theory formula, it basically is to consider is the rock mechanics properties and geostress relationship, Expression is simple, and in engineering achieved certain achievements.
Therefore the forecast to rockburst comprehensive multiple factors were discussed, The author thought that rock properties of rock burst have decided the internal and external environment conditions and the external disturbance, so for several main consideration rockburst forecasting core theory is strength theory, energy theory, stiffness impact theory, most other theory is the extension of three theories or developing.
On rock burst intensity the probability of occurrence in statistical forecasts, only a few researchers use single factor index of a simple predictions, not fully consider other factors affect rock burst, has some limitations and one-sided
But many factors affecting internal links without a simple formula, therefore can not be calculated using artificial directly.

Analysis of the mechanical properties of slewing bearings using finite element method Peng Li1, a, Min Wang1, b, Xiaoli Qi1, c, Jianyou Feng1, d, Xiaohui Liu1, e, RunqiuTang1, f, Wenying Zhao1, g 1School of Mechanical Engineering, Anhui University of Technology, Maanshan 243002, China askip000@163.com, b ustcwm@126.com, c qxllxw@ahut.edu.cn, d fengjy509@163.com,e jixie051liuxiaohui@126.com, f 597716245 @qq.com, gzhaowenying@163.com Key words: slewing bearing; finite element analysis; contact mechanics Abstract: Slewing bearings are the basic structural components widely used in construction machinery industry.
Mechanical properties of slewings bearing were originally analyzed using experience or simple analytical methods.
Hou [1] proposed hardness, hardened layer depth, radius of curvature and contact angle of raceway are the four most important factors affecting the quality of raceway.
Several structural and technical factors were found to significantly affect the load capacity of the slewing bearing studied [2].
Mechanical design and manufacturing (9) (2006) 56~58 [3] G.

Due to this fact they are carried out by a vast area, subject to various factors: the climatic, environmental and topographical features.
In industrial practice on various production stages of the fittings for overhead power line, there are many factors that cause the zinc coating thickness diversification, that in the next step determine its corrosion resistance and the period of their exploitation.
Thermal beam influence caused by a significant way the properties of the outer layer that depend on the creation of so-called Heat Affected Zone (HAZ).
The changes in the structure of treated material have an impact on the composition and properties of coating applied by hot dip galvanizing [4-7].
Surfaces having stratified functional properties.

The differential expansion between the turbine rotor and the cylinder is related to the rate of temperature rise, the unit structure, materials, physical parameters, parameters of steam and steam on the rotor and the cylinder surface coefficient of heat transfer and many other factors.
Reliability model If the strength of product or components X is less than the stress Y, then they can not complete the required functions, make products or components within a specified period of time to work reliably, must meet the X ≥ Y, that is (15) In mechanical design, strength X and stress Y and are often a function of some random variable, so often expressed (16) (17) where Xi is the random variable affecting strength, such as materials properties, surface quality, size effect, etc.
Yi is the random variable affecting stress, such as load case, stress concentration, temperature, lubrication, etc.
Conclusions The article first introduces the basic concepts of differential expansion turbine and the important impact factors of differential expansion size, and introduces the saddle point approximation theory.
[7] X.P Du: Journal of Mechanical Design, Vol.130 (2008) No.1, p.1

Appraisal of threshers The factors influencing the levels and rates of performance of threshers can be grouped into crop factors and machine factors.
The crop factors are moisture content of the grain, variety of crop, method of drying after harvest, density and specific gravity, shape and size of the grains and strength of the grains.
Materials and Method Before the design and development of the thresher some physical and engineering properties of the cowpea pod were considered.
(iv) Power requirement Determination of the physical and engineering properties of the cowpea The study was limited to two varieties of Cowpea (B301 and C70).
Results and Analysis Physical properties of cowpea pod and seed The maximum length of the pod of variety A (B 301) was 183mm and minimum length was 114mm.