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Indentation-derived tensile properties of ASTM A335 P91 pipeline.
From the results, it was concluded that indentation could be used effectively as a direct inspection method of welded joint considering various in-field environments and constraint factors.
Because the pipeline has been used for over 15 years, it could be affected by the various environmental conditions such as corrosion, mechanical shock, and other material degradation factors by long-term operation.
Accordingly, materials could have mechanical properties different from those of new materials.
From the results, it was concluded that the pipeline could be operated continuously in terms of mechanical properties.

The main part of the chassis is made of aluminum alloy 5052, this label material has good forming properties, corrosion resistance, blanch resistance, fatigue strength and the medium static strength.
The mains should be the IPC dedicated power, this type has good electromagnetic properties and mounting dimensions.
There’re several factors affect the performance of the gap shield, such as the maximum size of the gap, the depth of the gap, the characteristic of the shielding materials, etc.
The maximum size of the hole and the depth of the hole are the major factors affecting its shielding effectiveness, so when the shielding effectiveness of the ventilation holes and heating contradiction, increase the depth, reduce the diameter of the hole and increase the density and number of the holes can solve the problem.
Other Protective Design Hot flashes, salt spray and mold, these three environmental factors also affect electronic components, the technical precautions for them are called defense technology.

It firstly establishes the entity assembly model of internal gear pairs with precise tooth profile, then determines the number of multi-tooth meshing teeth pairs with finite element software and finally analyzes the main factors and reason affecting the number of meshing teeth pairs.
The main factors affecting the number of meshing teeth pairs are tooth number and tooth number difference.
Table 2 Number of Effective Meshing Teeth Pairs( =1) 39 59 79 99 124 149 40 60 80 100 125 150 Number of Effective Meshing Teeth Pairs 2 3 5 6 8 10 Table 3 Number of Effective Meshing Teeth Pairs （=5） 35 55 75 95 120 145 40 60 80 100 125 150 Number of Effective Meshing Teeth Pairs 2 3 5 5 6 8 Analysis of the Main Factors and Reason Affecting the Number of Meshing Teeth Pairs It can be seen from Table 2 ang Table 3 that the main factors affecting the number of meshing teeth pairs are tooth number and tooth number difference.
The main factors affecting the number of meshing teeth pairs are tooth number and tooth number difference.
China Mechanical Engineering.Vol.13(2002),p.1586 (in Chinese)

From the results, it indicated that physical and mechanical properties of newly added brick increased in dry density and compressive strength value but decreased in water absorption rate.
Material and Methods In order to measure the physical and mechanical properties value of each sample, the materials and method were discussed in this section.
Karaman [15] emphasized that the available pore space is affected by properties of clay, method of manufacturing and degree of firing.
Gunal: Firing Temperature and Firing Time Influence on Mechanical and Physical Properties of Clay Bricks.
Thiansem: Effects of Charcoal on Physical and Mechanical Properties of Fired Test Briquettes.

These factors influence non-monotonically a change of properties in the nanometer range and it is not always possible to predict the behaviour of material.
Thus the change of the physical and mechanical properties of surface layers happens during MPT due structure dispersion, structural-phases transformations and a change of chemical content.
Specimen for an evaluation of the mechanical tension properties The flat specimens 1.6 mm thick (Fig. 1) were used for an evaluation of the mechanical tension properties; the surfaces A and B were treated by MPT on the flat surface grinder.
Thus, using MPT and tempering to a certain temperature, it is possible to expect a set of of high mechanical properties, caused by nanostructuration of the surface layer.
Physical, chemical, and mechanical properties of nanostructured materials.

The generic list of variables affecting heat transfer from car radiator with nanofluids is illustrated in Table 1.
With refer to Table 1, few properties and parameters are fixed.
First of all, the material of nanoparticles must be selected in order to proceed to properties model selection and calculation.
Nanofluids Mechanical Properties.
Shima, Thermal properties of nanofluids, Adv.

The results of tested fresh properties are presented in Table 5.
Limestone addition supplies the gaps among coarse particles, reduces the porosity and increases the density of concrete lead to improved mechanical properties.
SCC made with higher quantity of filler limestone showed improved fresh properties. 3.
Mechanical properties, durability, and life-cycle assessment of self-consolidating concrete mixtures made with blended portland cements containing fly ash and limestone powder, Cement & Concrete Composites 56 (2015), 59-72
[19] ERMCO (European Ready Mixed Concrete Organization), Guidance to the engineering properties of concrete, 2006.

The main difficulties are therefore related to precisely model the bone's geometry and simulate its mechanical properties.
Bone's mechanical properties are dictated to a large extent by its mineral volume fraction, which lies in the range 25-45%, with a typical value of 38% for human bone.
Additional difficulty arises from variations in properties resulting from physical activity, particularly weight-bearing exercise [8], ageing (resulting from porosity variations, etc.), and other factors.
In parallelepiped specimens some properties do not affect resonant frequencies, and so they cannot be determined by a resonant technique.
The use of a non-conventional geometry is interesting, since more properties are involved in the definition of resonant properties.

In the spring after clay thawing, sticky lower and internal friction Angle increases, make mechanical properties of soil before and after freeze-thaw changes, directly affect the anchor pile bearing capacity[2,3].
This paper apply numerical simulation method, this paper analyzes the pile in melted soil foundation resistance of the properties of bearing pull, used for workover piling in spring. 1.
(2) For the frozen soil will melt in spring, the resistance performance of working derrick anchor piles is greatly affected.
References [1] Chen Juan, The soft soil foundation pile resistance to pull out of limit analysis of influence factors force.
Freeze-thaw effects on the mechanical properties of black studies on the effect.

Introduction Nanocrystalline materials have attracted extensive attention due to their excellent properties over their coarse grained polycrystalline counterparts [1-3].
The global behaviour may be effectively enhanced by optimizing the structure and properties of the surface of the material.
With this kind of surface modification, the surface properties can be greatly enhanced without changing the chemical composition [17-20].
To achieve a much thicker nanostructured layer, the external factors are taken into account such as mechanical and thermal stress.
The mechanical properties of the sample treated under traction will be investigated systematically in the future.