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Results showed that the designed porosity significantly affected the mechanical strength, density, and infiltration rate of the PC.
The void and pore structure are important properties that influence the performance of PC.
Besides, PCs with mineral additives exhibited higher performance in engineering properties, cost savings, and energy efficiency [8,9].
These results proved that porosity was the most important feature of PC, significantly affecting its permeability.
However, PC cannot be used for reinforcement, high-speed roads, and heavy-load traffic roads due to its mechanical properties and the open pore in the structure.

About the year 1759 the Tower was repaired, probably affected by the Earthquake of year 1746 (Silgado 1978), where it details to works of lime and brick, work of wood, cost of bells, raising them and putting this work perfect.
The 20 of November of the year a 1790 new seismic movement affects the Tower, causing the fall of two bells affecting to the church (Barriga 1944).
Mechanical Properties of Materials The walls that form the Tower are composed by units of bricks of clay joined by mortar of lime, for the present study there took the properties of the material found in other similar studies (Proaño et al, 2007) and whose results we adopt to give major accuracy to our analyses, these are: density of 1.7 gr/cm3, compression strengthen of 2.2 MPa (22 kg/cm2) and module of Elasticity of 1,110 Mpa.
Has used a pseudo accelerations spectrum according to the Peruvian Seismic Standard, the following parameters: Factor of Zone (Z=0.4), Factor of use (U=1.5), seismic Amplification factor, (C=2.5, Tp/T< 2.5), Elastic Reduction factor (R=1).
The analysis of walls needs to do a more accurate calculation of the seismic reduction factor R, taking into account the energy dissipations product of the progressive crackings in the structure.

For the use of composite materials as a part of a structure or a machine element, the mechanical properties and fracture toughness are important factors.
The mechanical properties are shown in Table 1.
Physical and mechanical properties of the material Fig. 1 Macroscopic appearance of the material (a) (b) (c) Fig. 2 Geometry of the specimens (b = 3.5 mm, 5.1 mm); 2(W-t) = 20 mm, t =0.5, 1.0, 2.5, 5.0, 7.2 mm, Notch root radius of blunt notch = 8mm Results and Discussion Critical fatigue strength and failure mechanism According to previous research [1,2], fatigue limit or critical stress amplitude sw of each specimen pattern can be approximated by Load Increase Test (LIT) using a single specimen.
Therefore the stress concentration did not affect the fatigue strength of the present specimens.
(2) The void fraction affected the fatigue limit.

Vina Olay3 1LMNEPM, Department of Mechanical Engineering, University Abdelhamid Ibn Badis of Mostaganem, 27000-Algeria 2LMPM, Department of Mechanical Engineering, University of Sidi Bel Abbes, BP 89, Cité Ben M’hidi, Sidi Bel Abbes, Algeria 3 Dpto.
Introduction The elastic behavior of materials is very affected by the presence of defects which can entail the weakening of the structure and cause its destruction.
Mechanical properties of the stainless steel 304L. 186000 419.22 0.30 752.4 The considered pipe was subjected to uniaxial tensile in the vertical direction under a stress The commercial finite elements code ABAQUS V.6.7.1was used for computation [16].
The maximum values of the stress intensity factors are obtained when the ratio of the interdistance tends to a zero value.
We have neglected the presentation factor as long as is small in comparison with .

The durability of patch repairs depends on compatibility of the repair material with the substrate concrete in terms of chemical, electrochemical, mechanical and dimensional properties.
Different factors such as electrical resistivity, cathode to anode surface ratio affects the magnitude of the macrocell current [5].
Evaluation of the material properties of repair materials alone will not be sufficient to predict the success of a repair after its field application.
Factors that influence the macrocell current magnitude The influence of factors such as quality of substrate concrete, type of repair material and the area ratio between anode and cathode are compared as shown in the Fig 5 A-C.
Fig. 5 Factors influencing the magnitude of macrocell current The key findings of the study are explained in the following points, · Macrocell activity is decreasing with the passage of time.

Forming mold is a core part of the vacuum brick extruding machine, its mechanical properties directly affect the performance of vacuum brick extruding machine and the quality of bricks.
The cross section size, length and taper of machine mouth base on brick machines, size of bricks, type of materials and other factors.
The temperature of the machine mouth is an important factor in the molding process of the brick.
Thus affect internal quality and surface state of the brick [12].
With the current research status on the development of the vacuum extruder mold, some trends can be summed up as follows: (i) Vacuum extruder mold design, improvement and optimization as well as advance in technology are inseparable from the physical characteristics and mechanical properties of the blank awareness and research, and different blanks have different physical characteristics and mechanical properties, which greatly increase the complexity of the mold design.

Gray haze, photochemical smog, acid rain and so on compound pollution problem increasingly prominent, especially the atmospheric pollution of fine particles (PM2.5) has been highlighted as the major environmental problem [1].These endanger human body health and are important pollutants affecting the quality of atmospheric [2,3].
Oscillator relied mainly on analog circuit closed-loop self-excitation oscillator drives, physical properties of the oscillator itself determines the loop resonance frequency, oscillation stability and Q value.
Now TEOM system’s fault is analog circuit closed-loop stability of the oscillator determined by the physical properties, the mechanical structure of the vibrator, and depends on the analog circuit design parameters and external disturbance to the circuit.These factors increased the oscillation system achieving stability the difficulties.
dM in the formula (2) is quality variation of the self-excited frequency with oscillation system changing from f0 to f1.K0 is the elastic constants ofcomposite oscillator and is determined by elastic coefficient,geometry and weight distribution and other factors of the oscillation component material.
The current amplitude was proportional to mechanical vibration amplitude.

The quasi-static properties of 17-4 PH manufactured by SLM are usually similar or slightly above those of wrought and cast materials [2].
Another feature to be pointed out is that the characteristic porosity which comes from the production process can impact the mechanical properties of the material [2].
Bian, “Mechanical and microstructural properties of selective laser melted 17-4 ph stainless steel,” in ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE), 2015, vol. 2A-2015
Hamlin, “Microstructural Evolution and Mechanical Properties of Simulated Heat Affected Zones in Cast Precipitation Hardened Stainless Steels 17-4 and 13-8 + Mo,” 2015
Gilioli, “Numerical and experimental assessment of the mechanical properties of 3D printed 18-Ni300 steel trabecular structures produced by Selective Laser Melting – a lean design approach,” Virtual Phys.

The temperature will result in the variation of gear thermal deformation[5-7], the existence of the thermal deformation causes the gear tooth error. it makes tooth thickness increase and cause the gear tooth profile, affecting the gear transmission error. thermal deformation of different locations are different and it impacts on the transmission smooth of gear.
The calculation of gear thermal deformation need to consider three factors.
Second, thermal expansion properties of structural materials.
Gear geometrical parameters and material properties such as table 1 and table 2 show.
Play: American Society of Mechanical Engineers 88 (1996) 519-526

Because it contains the expected mechanical properties, such as strength and resistance to corrosive behavior in severe conditions, it is ideal for usage and can be used to a variety of applications.
Goiria, Development of laser welding of Ni based superalloys for aeronautic engines applications (experimental process and obtained properties), Phys.
Martin, Effect of friction stir welding speed on mechanical properties and microstructure of nickel based super alloy Inconel 718, Sci.
Effect of Nd:YAG Laser Welding on Microstructure and Mechanical Properties of Incoloy Alloy 800.
Microstructure and Properties of Inconel 718 and AISI 416 Laser Welded Joints.