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Introduction Temperature and humidity changes of concrete structure is one of the important factors leading to concrete structure cracks, temperature deformation and humidity deformation of concrete usually occur at the same time, and temperature field and humidity field in the concrete also interact [1,2].
A large number of studies have also shown that: concrete humidity changes don't exist independently, and to a large extent are influenced by factors such as temperature and stress.
Granger and others used the micro mechanical model to describe the dry shrinkage deformation of concrete, took drying shrinkage curve of test as the main basis of dry shrinkage deformation calculation, and combined with the selected micro mechanical model , it has revealed the concrete shrinkage deformation calculation method better.
This heterogeneity of concrete is one of the important factors affecting its mechanical performance , so it should not be ignored, however, currently most studies of the coupled temperature and moisture transfer are based on the homogeneity assumption of concrete to do the the research of temperature field and stress field, and some damage mechanics models which are set up based on the macroscopic level of concrete , are unable to understand the response of mesoscopic structure to external load and temperature and humidity coupling effect, thus are inevitably unable to study the differences between the two kinds of structural mechanics  which are same on a macro-scale, but different in mesoscopic structure.
The current simulation and analysis of concrete are only applied to solve the temperature field , humidity field and stress field , not considering the influence of temperature and humidity on the concrete material properties (elastic modulus, strength, thermal parameters, etc.), and cannot analyze the failure process of concrete under the temperature and humidity coupling effect, and for site construction, it is crucial to forecast the position of the cracks and the development trend of the cracks.

Mechanical Engineering and Industrial Design.
Introduction CFRC (Carbon Fiber Reinforced Composites) show excellent relationship weight/physico-mechanical properties, much higher than those in metallic materials.
The interface between the fibers of material offers low resistance to avoid time crack propagation, depending only on the properties of the matrix, much less resistant than fiber.
In order to dispose of an evaluation methodology of these defects a new factor DF based on the calculation of the percentage change of the affected area versus nominal area has been proposed.
It can be associated with the duration of the thermo mechanical effect on the workpiece.

Some factors affecting the formation of a heat island are the intensive use of asphalt and diverse construction materials, mainly concrete [1].
The physical properties of BA include specific gravity 2.3 g/cm3.
Results and discussion Physical properties Fig. 1 shows the water absorption and volume of water retention for various blocks.
Mechanical property - compressive strength Compressive strengths decreased with decreasing the size of aggregate in the blocks.
Environmental properties Using the contaminated rainwater form real roadway, the removal of pollutants by the NPPB was examined.

Once WH grows and spreads quickly, these WH plants cover lakes and ponds, causing clogged waterways, affecting aquaculture, and hindering agricultural activities [4].
Tensile Properties.
The lignin presence also influenced the mechanical properties of the WH fiber film.
Besides processing time, temperature was another parameter that significantly impacted the WH film's moisture content, water absorption and mechanical properties.
Their mechanical properties also improved with the rising amount of lignin on the surface of WH film.

In recent years, additive manufacturing technologies have been used to produce customized articles and personalized implants with improved mechanical and physical properties [13].
Quite expectable that changing certain SLM parameters we can obtain different speeds of melted pool hardening and thermal cycles, affecting the microstructure of a melted zone.
Therefore, slowing of scanning velocity and modulation frequency of laser output were key factors for a high quality structure.
Ebert, Magnesium: Properties–Applications–Potential, Mater.
Guo, Improving mechanical properties and corrosion resistance of Mg-6Zn-Mn magnesium alloy by rapid solidification, Mater.

An Investigation of the Mechanical Properties And Fracture Characteristic of Hot-Pressed Boron Nitride Ceramics B.
However, the degree of the anisotropy depends on the type of the mechanical property.
In the present study, the primary aim is to determine the degree of anisotropy of hot-pressed hBN based ceramics for various mechanical properties.
To achieve this goal, the full mechanical characterization of hot-pressed ceramics was performed in order to investigate to what extend the fast-fracture parameters (MOR and KIC) are dependent on the direction and finally conclude which mechanical properties are associated with the anisotropy most.
The effect of the anisotropy of hot-pressed h-BN based ceramics for various mechanical properties was determined.

The factors of the geopolymerization reaction system include the ratio of Si/Al, Na2SiO3/NaOH, concentration of NaOH, curing temperature, and time of polycondensation [18-19].
The category of raw materials used can also affect the properties of geopolymers.
The mechanical properties of geopolymer compressive strength were investigated.
Perraki, Effect of synthesis parameters on the mechanical properties of fly ash-based geopolymers, Colloid.s Surf.
Farzadnia, Characterization of mechanical and microstructural properties of palm oil fuel ash geopolymer cement paste, Constr.

The porosity content of A201 aluminum alloy was affected by the local solidification time and solidus velocity in this study.
Introduction A201aluminum alloy has the highest mechanical properties among all the cast aluminum alloys, the tensile strength of A201 is even stronger than some wrought aluminum alloys, such as: 6061 and 6050.
Both of solidification time and solidus velocity are affecting the porosity content in A201 aluminum alloy plate castings, but cannot individual precisely describe porosity formation during solidification process.
Berry, “A Reexamination of Factors Affecting porosity [5] J.E.
Hatch, “Aluminum Properties and Physical Metallurgy” ch.6, ASM (1984) [6] ASM Metals Handbook “Castings” Vol.15 9th.

Introduction Over the past decades, Inconel 718 is increasing its importance as one of the most interesting group of aerospace materials, due to its unique properties such as high strength thermal resistant and high corrosion resistant.
Moreover, produced heat during cutting is the most important factors affecting performance and productivity of metal cutting operations.
In order to investigate the degree of influence of control factors (cutting tool (A), depth of cut (B), cutting speed (C), feed rate (D), frequency (E) and coolant (F)) on flank wear, hardened, surface roughness and cutting force in milling Inconel 718, six factors, each at three levels, are considered.
In Table 3, the most important variables affecting the flank wear are cutting tool (P = 28.6 %) and frequency (P = 27.7 %), and the feed rate (P = 14.4 %) and depth of cut (P = 12.3 %) are also considered as a significant factor.
The most important variables affecting the flank wear are cutting tool (P = 28.6 %) and frequency (P = 27.7 %), and the feed rate (P = 14.4 %) and depth of cut (P = 12.3 %) are also considered as a significant factor.

The level of various factors usually bases on the experience.
Hu, The effect of hybrid fibers on the mechanical properties and impermeability of high-performance concrete, Concrete, 11 (2003) 33-35
Wang, Mechanical properties and impermeability of hybrid fiber reinforced concrete, Journal of Building Materials, 1 (2008) 89-93
Jie, Keru Wu, Mechanical properties of hybrid fiber-reinforced concrete at low fiber volume fraction, Cement and Concrete Research, 33 (2003) 27-30
Gong, The effect of hybrid fiber-reinforced concrete on mechanical properties and crack resistances, Concrete and Cement Products, 2 (2009) 48-51