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To this end, a numerical modelling was made on the basis of a discretization of the crack front (characterized with elliptical shape), considering that the crack advance at each point is perpendicular to such a front according to a Paris-Erdogan law, and using a three-parameter stress intensity factor (SIF).
NaCl corrosion-fatigue affects the fatigue performance of high strength steel by increasing the crack growth rate in relation to its value in inert environment [3,4], this effect being even higher if the environment is constituted by Ca(OH)2+NaCl [5].
Mechanical properties of the steel were obtained by Singh and Sánchez-Gálvez [5] as follows: Young’s modulus E=204.4GPa, yield strength sY=1430MPa, ultimate tensile strength (UTS) sR=1670MPa and fracture toughness KIC=119 MPam1/2.
The point at the cylinder surface was not taken into account, since it presents difficulties regarding the computation of the stress intensity factor (SIF) K because there is a plane stress state at the crack edge.

Therefore, for small replacement ratios, it is possible that the overall stiffness is not significantly influenced, because the mortar stiffness is only one of several factors, while for total replacement the mortar withstands such a big stiffness loss that the concrete’s modulus of elasticity is considerably affected.
Neville, Properties of concrete, Longman, London, UK, 1995
Correia, J. de Brito, Post-fire residual mechanical properties of concrete made with recycled concrete coarse aggregates, Cem.
Correia, Mechanical properties of structural concrete with fine recycled ceramic aggregates, Constr.
De Brito, Post-fire residual mechanical properties of concrete made with recycled rubber aggregate, Fire Saf.

Properties of samples are presented in Table 1.
These materials have high indicators of chemical firmness, durability, and elasticity, shock firmness as well as high adhesion to metals and functionality in the conditions of high humidity in a wide temperature interval from minus 60 оС to 130 оС without essential deterioration of mechanical properties.
Measured and calculated ranges of electromagnetic response of composite with 4 % (a) and 5 % (b) of mass content of GE-3 Measurements of properties of the electromagnetic response allowed to receive values of complex dielectric permeability in a range of frequencies where measurement was held.
Depolarization factor of the spherical particles equals 1/3 in all of the directions and flat particles are placed parallelly while composite production.
Electrophysical and electromagnetic properties of pure MWNTs and MWNT/PMMA composite materials depending on their structure.

The visual impact coming from pixel’s form, arrangement, color, direction, and other factors is also delicately explained.
According to mathematical analysis the significance of Moiré is decided by the following factors: 1.
Due to this constraint in printing process there are limited factors in print reproduction principles and technology to manipulate.
Fortunately for designers and artists these factors make it possible to exploit the aesthetic function of dots.
Understanding these factors and superimposing their functions comprise a very important part in exploring its artistic value.

Sealing performance analysis of Cap seal rings in the Stirling engine piston rod Chang Jun1,a 1School of Mechanical Engineering, Lanzhou University of Technology, Lanzhou city, Gansu province, China achangjun0931@163.com Keywords: Rod seal; cap seal structure; stress analysis Abstract: When the Stirling engine piston rod for reciprocating motion at a high speed under dry friction conditions, the temperature fall or pressure drop is mainly caused by uneven sealing ring deformation, increased wear and sealing performance fall.
Introduction Stirling engine as key components of plate type heat generators system, its performance directly affects the working efficiency of Plate type heat power generation system[1].
Because the cap seal is under the condition of dry friction of reciprocating dynamic seal, so under harsh working environment, the factors for influence effects of cap seal is complex.
Cap seals installation shematic diagram The stress analysis of cap seal in theory under the dynamic seal condition Structure and material properties of PTFE Teflon (PTFE) is a thermoplastic material, which high molecular weight, high crystallinity, its molecular structure is shown in figure 1.1.

SINS Transfer Alignment Based on Robust SDRE Filter Dayong Wang , Ping Sun, Peng Jianyi 1, Xing Huo Gang XU2, b Wuhan Mechanical Technology College,Wuhan Hubei , 430075, China 1email: pjyxp@163.com Keywords: SINS; alignment; SDRE filte Abstract.
Initial alignment is a fatal technology for SINS, and it affects the navigation performance of the system directly.
Robust SDRE filter Consider a smooth nonlinear uncertain system described by continuous-time equations of the following form [6] : (3) (4) where is the state, is the measured output, and , are process and measurement noises with unknown statistical properties, which stand for exogenous disturbance inputs.
Multiple Fading Factors Kalman Filter for SINS Static Alignment Application.

The analysis of the surface properties on the slip resistant of the treated surfaces was equally done and it was observed that the hardness and roughness of the alloy affects the coefficient of friction via comparative studies [16].
Also, established that Alloy steels are stronger than normal steel due to the alteration in their mechanical and microstructural properties.
Investigating the combined effects of wide stacking faults and grain size on the mechanical properties and corrosion resistance of high-purity Mg.
Grain boundary engineering prepared by iterative thermomechanical processing of nickel-saving austenitic stainless steel: Excellent corrosion resistance and mechanical properties.
Effect of grain size on the mechanical properties and bio-corrosion resistance of pure magnesium.

Table 1 lists the physical property of the assembly materials used.
As mentioned above, the optical fiber array assemblies are mainly made up of four different parts: V-groove block, optical fibers, lid glass, and bonding materials, the physical properties are not strictly matching, such as CTE and refractive index.
The contaminant may cause serous defects, such as weaken the adhesion force resulting in poor mechanical and optical performance.
Adhesive stresses can be an important factor affecting FA quality and durability.
Shrinkage is an inherent property of optical epoxy or acrylate adhesives.

Modification of the Magnetic Properties of Co2Y Hexaferrites by Divalent and Trivalent Metal Substitutions Sami H.
Classification and Properties of Hexaferrites 2.1.
The mechanical grinding was carried out for 16 hours at a rotational speed of 250 rpm.
However, the magnetization of the high temperature phase was reported to be small [127], and therefore can hardly affect the magnetic properties of the sample.
Elhalouani, Structure, magnetic properties and Mössbauer spectra of La0.67Sr0.33FexMn1-xO3 manganites oxide prepared by mechanical ball milling method, Hyperfine Interactions 211 (1-3) (2012) 153-164

The simulation results shows that the statistical attribute of these parameter introduce variation to the systems dynamics property.
Introduction Spindle system is one of the key components of a machine tool, since its performance directly affect the machining accuracy and the cutting ability of whole machine.
Of course, the more physical properties the system model considers, the more complex the application of the model will be.
Journal of Mechanical Design, 1980, 102(4),793-803
Journal of mechanical design, 2004, 126(6):1089-1105