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The mechanical performance of concrete structures closely relates to the propagation of cracks.
The calculation accuracy of effective crack length a affects the characteristic crack length and energy dissipation accuracy of concrete.
Table 1 Three-point bending beam specimen mechanical properties and dimensions Specimen NO. a0/h Fmax[kN] CMODc[μm] CTODc[μm] a[mm] Gf [N/m] Gf×[N/m] TPB25-02-01 0.2 7.188 43.0 26.52 75.1 59.525 59.526 TPB25-02-03 0.2 6.948 41.4 26.46 80.6 58.823 58.823 TPB25-02-04 0.2 5.563 44.6 29.96 90.9 65.820 63.789 Mean 0.2 6.543 43.7 28.23 82.97 61.389 60.712 TPB25-03-01 0.3 5.095 49.7 24.77 92.4 55.09 54.382 mean 0.3 5.095 49.7 24.77 92.4 55.09 54.382 TPB25-04-01 0.4 4.458 56.0 22.59 109.8 49.708 49.514 TPB25-04-02 0.4 3.696 58.7 22.13 104.7 49.239 48.588 TPB25-04-04 0.4 3.75 60.8 24.86 111.0 57.029 55.805 mean 0.4 3.968 58.5 23.32 108.8 51.992 51.302 TPB25-05-01 0.5 3.730 60.1 19.03 125.7 42.141 40.694 TPB25-05-03 0.5 3.008 54.3 18.98 133.6 40.328 38.002 TPB25-05-04 0.5 3.750 59.7 20.24 130.9 36.845 33.402 mean 0.5 3.720 58.1 19.04 128.2 39.772 37.366 Analysis of test result.
The results indicate that each specimen’s fracture energy of the same crack-ratio is not identical because of the uncertainty factors in the test, though the difference is not big.
[2] S.W.Hu, J.Lu and X.Q.Zhong: Study on characteristics of acoustic emission property in the normal concrete fracture test [J].

Therefore, in this study, anisotropic material-based CFRP structural member, which changes mechanical property according to orientation and has higher specific strength, is used for vertical shock tester to understand collapsing characteristics and shock property according to shock energy change.
Shape and stacking method for test specimen is shown in Fig. 1.To understand the impact of ply number, stacking angle, and change in shock energy on shock properties of CFRP structural member, ply number is changed to 2, 4, and 6.
(a), ply numbers and outermost layer orientations affect significantly on absorption energy even for the same shape of CFRP member.
Fig. 3~4 shows the relationship between dynamic properties and number of plies along with different impact speeds for rectangular member using least mean square method.
Fig. 3 introduces dynamic property coefficient, Φ.

Several types of materials with different material properties have been simulated, such as high permeable mumetal and conductive aluminum, for the chamber itself, copper for the coil and air as the medium in which the magnetic field is propagating.
The influence of geometrical and material properties parameters, like the thickness and the permeability of the ferromagnetic alloy, in the effectiveness of the shielding has been investigated using optimization techniques available in the design optimization module existing in the ANSYS v 14.0 ® finite element analysis software.
Particularly, magnetic fields at DC and low frequency, caused by permanent magnets, communication lines and even by earth field, can significantly affect the performance of highly sensitive devices [18,19].
Niarchos, Mechanical Sensors Based on Re-Entrant Flux Reversal, IEEE Trans.
Petridis, I Petrou, PD Dimitropoulos, E Hristoforou, Determining appropriate magnetic core properties for a new type of flux-gate like sensor, Sensor Letters, 5, p. 98-101, 2007 [10] B.

Numerous factors are implicated in the corrosion processes and can act in concert.
This reveals a complex effect of this parameter, as indicated by the numerous (beneficial or detrimental) actions mentioned in the literature: (i) increased oxygen activity in the simulated H2Ocontaining atmosphere, (ii) accelerated oxidation due to the fact that the size and charge of the OH ion are lower than the ones of the O 2 ion [8], (iii) increased scale porosity in the presence of H2O favouring oxygen diffusion [9], (iv) modified scale mechanical properties [10, 11], (v) enhanced volatilisation of Cr-compounds [12], (vi) modified acido-basicity of the molten compounds involved in a fluxing action [13, 14], and (vii) reduced Cl2 partial pressure due to the displacement of the Deacon reaction (Eq. 4) [13].
The nature of the chloride did not appear to affect the scale formation.
It could however be attributed to better mechanical properties in presence of H2O, reduced Cl2 partial pressure, and modified acido-basicity of the molten phases.
The conclusions obtained concerning these complex systems, where numerous factors act singly or in concert, are as follows: (1) In coal-fired plant superheater environments, the participation of molten alkali-iron trisulphates in the corrosion mechanism was confirmed: actually the degradation depended on the alkali sulphates and SO2 contents, and on the temperature.

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.

Experimental results show that the number of holes, size, shape, all affect the size of the thermal conductivity.
Now the hole technique by changing, increasing the flow a long way to increase the number of holes arranged, staggering arrangement of holes, extending heat conduction process in the pore wall, reducing the pore size of concrete and brick wall to improve the hole masonry thermal insulation properties. 
The hole forms directly affects the pore type block porosity. 
Therefore, in the process conditions and mechanical properties of permission, the appropriate row of holes to increase the number of hollow block, to improve the insulation capacity of hollow blocks is clearly beneficial. 2.3 Group B experiment (different hole shape experimental) 2.3.1 The relationship between the different shape of opening and the strength The major product of concrete hollow brick produced at present and past is light melted.Its patterns must be either round shape or big square hole.We make several experiments about the blocks in distinct patterns shape.Then we get the same hole section situations different holed the compressive strength, the coefficient of thermal conductivity of the section with holes in the relationship.The table below is different holed hollow blocks measured the average thermal conductivity.Units: w.
Pervious Concrete Pavement Preparation and Properties of Materials [D]. ​​

(in Chinese) [3] Padadakis V G, Vayenas C G, Physical and chemical characteristics affecting the durability of concrete [J].
Mechanical Properties and Microstructure of Fly Ash Based Geopolymeric Polymer Recycled Concrete [J].
A review of carbonation in reinforced concrete(Ⅲ)——Migration of corrosive factors in concrete[J].Concrete,2006,(1):51-54.
Mechanical properties and microstructure analysis of fly ash geopolymeric recycled concrete[J].
Discussion on Properties and Microstructure of Geopolymer Concrete Containing Fly Ash and Recycled Aggregate[J].

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.

Identifying of forces driving C-PC The driving forces are those factors (external and internal) that have the biggest influence on the given activity outcomes [3,4].
As the external global driving forces [5] which significantly affecting C-PC development could be included: sustainable development and nanotechnology.
In practice, however, the polymer admixtures can also modify the technical properties of the hardened concrete.
Chen, Properties of Polyacrylic Ester Latex Modified Cement Mortar, Proc. of the 14th ICPIC, Shanghai, 2013 [17] D.A.S.
Stanciu, Properties of Polymer Modified Concrete in Fresh and Hardened State, Proc. of the 14th ICPIC, Shanghai, 2013 [24] X.

This results in a rapid and repeated heating and cooling with consequent unique microstructural, texture and mechanical properties.
The scan strategy is shown to be an effective factor on such a diversity [16], [17].
Seifi, “Metal Additive Manufacturing: A Review of Mechanical Properties,” Annu.
Eckert, “Microstructure and mechanical properties of the near-beta titanium alloy Ti-5553 processed by selective laser melting,” Materials & Design, vol. 105, pp. 75–80, Sep. 2016, doi: 10.1016/j.matdes.2016.04.103
Todd, “The Origin of Microstructural Diversity, Texture, and Mechanical Properties in Electron Beam Melted Ti-6Al-4V,” Metall and Mat Trans A, vol. 41, no. 13, pp. 3422–3434, Dec. 2010, doi: 10.1007/s11661-010-0397-x