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The definitive reason of which nanoparticles-modified asphalt is quite different from the asphalt modified with other methods is that the former influence asphalt properties at microscopy level and the latter not. [1-3] As we all knows, microstructure is an only decisive factor of macro-properties of the materials.
So that the nanoparticles-modified asphalt can influence asphalt properties greatly, and this cannot be compared with other asphalt modified methods.
The mutual adaptability and the dispersive stability between the additive (dispersed phase) and asphalt base material (dispersing medium) are the key factors to obtain the excellent mechanical property of asphalt composite.
Contrarily, not only the materials properties cannot be optimized but also may worsen if the consistence is poor.
This is not only affects the normal function of nano-effects but also lead to side effects sometimes.

Introduction The failures of metal parts in industries like metallurgy, mining, electric power, cement areas mainly result from wearing, corrosion, oxidizing at high temperature and some parts suffer from dual effects of wearing and high temperature, which require not only enough hard phases for wearing resistance but also excellent mechanical properties and oxidizing resistance.
The effects of particles volume fraction, coating for particle and particle size on the high temperature wearing resistance for Al2O3/heat-resistance steel matrix composite material and high temperature crack behavior under different conditions were analyzed while provided effective data and experience for the composites with excellent comprehensive properties on both theory and practice.
Metal matrix with high strength sustains ceramic particles effectively for improving integer wear resistance property as forces transmission between the particles and the matrix during the working period for the composite material with required temperature comprehensive properties, while ZG40Cr25Ni20 alloy was choose as metal matrix material in the experiment with the same chemical composite and mechanical properties as the HK alloy [2].
(a) Metal matrix material; (b) Composite (Vc=52%); (c) Composite (Vc=39%); (d) Composite (Vc=18%) Results and Discussion The particle volume fraction in the composite material is one of important factors affected the properties.

Introduction We started by the realization of a database containing mechanical properties of aluminium alloys at different temperatures, which are the principal data to be introduced to the numerical code [2].
- Then, a second step of calculating the stress intensity factor
The line segments located on either side of the diagonal correspond to an error on the fatigue lifetimes by a factor of two.
The crack growth is considered in this work under mode I loading, which is the most dangerous to the integrity of mechanical structures.
Differences between numerical and experimental results are affected by several parameters, we can mention: the assumptions made in the formulation of algorithms, the inaccuracy of the experimental determination of some specific parameters in the predictive model.

The same actuators such as ball screws have the same mechanical and electronic parameters.
Mathematical modeling of two-axis synchronization control system When analyzing the feed drive system of an unique axis, the friction of the servo motor and the viscous damping factor are ignored to reduce the complexity of the system model.
Fig.1 Two-axis synchronization control model Fig.2 Two-axis synchronization control simulation model Due to the little affect on the system, the friction of the servo motor and the viscous damping factor are ignored.
According to the mechanical characteristics, the maximum jerk is set to 4m/s3,the maximum accelation is set to 4m/s2 ,the maximum velecity is to 10000 pulse/s that is 10m/min,and velecity is set as trapezoid.
Properties of Fuzzy Systems, WSEAS Transactions On Systems, Issue 2, Vol. 8, Feb. 2009, pp. 210-228

The aim of this study is to compare some physico-mechanical and microstructural properties of lava sand mortars with reference mortars with pure quartz sand.
Any detailed study of the properties of lime mortar with lightweight volcanic aggregate has not been published yet.
The use of lava sand resulted in slightly improved mechanical properties of the mortars despite the higher amount of mixing water required for the same fresh mortar consistency.
Summary This paper has focused on the effect of lava sand on the mechanical properties, microstructure and frost resistance of lime mortars.
Improving the properties of mortars using lava sand is a good prerequisite for its use in practice; increased porosity of mortars is a positive factor for high ability to salt accumulation from masonry and enhanced water permeability in mortars.

The characteristics of the fiber reinforced concrete are mainly decided by the physical properties and mechanical performance of the fiber.
Compared with ordinary concrete, steel fiber reinforced concrete has superior tensile, bending, shear, fatigue resistance and high toughness properties, which not only can improve the rock mass cohesion and internal friction angle, can eliminate the cavity opening on the surface after the rock excavation that can bring up uneven stress concentration and can improve the mechanical properties of rock and effective control over the surrounding rock deformation.
Polypropylene fiber reinforced concrete is mixed with a small amount of chopped polypropylene fibers to enhance or improve certain properties of concrete composites.
Characteristics of polypropylene fiber reinforced shotcrete include that: (1) High strength properties of polypropylene fiber reinforced concrete.
Study on the mechanical properties and constitutive relation of steel fiber reinforced concrete[J].

Introduction Among the factors that negatively affect the structural performance of polymer composite materials (PCM), the impact of moisture is especially prominent [1-10].
Antipov, Reversible influence of moisture on the mechanical properties of pcm after weathering, Trudy VIAM. 65 (2018) 110-118
Peng, Hygrothermal aging effects on the mechanical properties of 3D printed composites with different stacking sequence of continuous glass fiber layers, Polymer Testing. 100 (2021) 107-242
Gulyaev, The influence of climatic ageing on the properties of pcm-based epoxy resin systems, Trudy VIAM. 3 (2021) 128-136
Linul, Fiber-reinforced polymer composites: manufacturing, Properties, and Applications, Polymers. 11 (2019) 1667-1668

Composites have a wide range of applications in robotics, aerospace, aviation, and automotives as they have desirable properties such as high strength to weight ratio, good mechanical and electrical properties, and durability.
Matrices resist the environment attacks to the composites and have a major influence on many mechanical properties of a composite[11, 21, 22].
One of the important factors to calculate strength of a composite is to measure the relative volume and weight ratios of the composite.
The properties of the composites are affected by the voids present in them and knowledge of void content in a particular composite is essential to determine its overall properties[35].
Chawla, Mechanical properties of epoxy resin–fly ash composite, J.

Performance of Hydrostatics Spindle Under Effect of Mass Unbalance Dongju Chen1, a, Yanhua Bian1, b, Jinwei Fan1,c and Feihu Zhang2,d 1 College of Mechanical Engineering & Applied Electronics Technology, Beijing University of Technology, Beijing, 100124, China 2 Center of Precision Engineering, Department of Mechanical Engineering, Harbin Institute of Technology, Harbin,150001, China a dongjuchen@gmail.com, bjwfan@bjut.edu.cn, czhangfh@hit.edu.cn Key words: Hydrostatic bearings; Dynamic response; Stiffness; Deflection Abstract: The static and dynamic model of spindle system is established in order to analyze the vibration response with the effect eccentricity of spindle.
Introduction Spindle system is one of the most important parts of a machine tool since its properties is close related to the machining accuracy.
Vibration caused by mass unbalance is an important factor limiting the performance and fatigue life of rotating system[1], it also affects the machining accuracy.
In the first approach of bearings properties the elastic deformation of the spindle is not considered.
Necessary data of material properties are Young’s modulus 2.0´109 N/m2, Poisson’s ratio is 0.3 and mass density is 8.58´103(kg/m3).

By means of using these additives in an amount of 1-1.5% of the binder (by weight), you can adjust physical and mechanical properties of dry mixtures.
The essence of this method consists in changing factors of influence by introduction of ammonium salts, superplasticizers “Megalit”, “Sika” etc.
Study of the Process of Stabilization of Properties of Gypsum Binders.
Study of impact factors and the mechanism of gypsum binder hydration process in the presence of nanomodifiers.
Influence of nanomodifiers on physical and mechanical properties of gypsum binders.