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Such changes affect their mechanical properties.
Such changes affect their mechanical properties (strength, deformability), which can have an influence on man made structures resting on or interacting with them.
There are many factors can affect the water-rock interaction, such as mineral species, temperatures, pH values, ions species and ions concentrations.
Due to hydro-chemical aggression, the mechanical properties of the geomaterials will be changed.
Mechanical properties of rocks: pore pressure and scale effects.

Despite its excellent mechanical properties even at a low temperature as low as -162℃, with improper welding procedures, 9%Ni steel may still exhibit unsatisfactory postweld mechanical properties in the HAZ.
This study was conducted to seek appropriate approaches to make accurate predictions of HAZ hardness for 9%Ni steel welding, also aimed to explore determining factors of HAZ mechanical properties which might be properly regulated to obtain proper microstructure and relatively low hardness of near-weld HAZ.
However, it is apparent that there are considerable differences between the hypothetic values and the experimental values, because factors like chemical composition are not taken into account which are indeed of considerable importance to other properties.
Relative error shown in Table Ⅵ would suggest that the newly-developed formula of hardness could give a fairly good prediction of HAZ hardness for 9% Ni steel and steels with mechanical properties and microscopic structures alike in normal welding situations.
Easterling, “Predicting heat affected zone microstructures and properties in fusion welds,” Advances in Welding Science and Technology, Australian Welding Institute, 1986, pp. 99-109.

Introduction Simulations and predictions of mechanical properties of various polymer matrix composites have been carried out [1, 5, 8, 12].
On fibers subjected to transverse tensile loading act different influences affecting the lamina’s mechanical behavior such as: stresses due to the loadings action; interference stresses; possible internal stresses and additional stresses that cause an increase in the matrix strain.
Moreover, at fibers volume fractions over 40%, the difference between these two factors increases.
Vlase, Homogenization and Averaging Methods to Predict Elastic Properties of Pre-Impregnated Composite Materials, Comp Mater Sci, 50(4) (2011) 1310
Astalos, Properties of Advanced New Materials Used in Automotive Engineering, Optoelectron Adv Mat, 7(5-6) (2013) 452

There are many factors affecting the successful production of desired parts using this manufacturing process.
The most important factors are the fluid pressure and blank holder force.
Having proper values of these parameters during forming has a direct impact on part properties such as drawing ratio and thinning.
The plastic properties (true stress- plastic strain curve) (Figure 3) of the sheet metal (Al5754) is used as they were obtained from tensile tests reported in (Turkoz et al. 2010).
Figure 3 True stress-strain curve for Al5754 (Turkoz et al. 2010) Table 1 Material Properties for Al5744 and process parameters used in FEA.

According to Wang et al. [13], factors such as waviness, agglomeration, and interphase, were found to affect the thermo-mechanical performance of Al matrix composites.
It is clear that the wavy shape of the CNT ESF affects the mechanical and thermal characteristics of the TMNCs.
Ruoff, Tensile loading of ropes of single wall carbon nanotubes and their mechanical properties, Phys.
Agarwal, An analysis of the factors affecting strengthening in carbon nanotube reinforced aluminum composites, Carbon N.
Chen, Mechanical properties of carbon nanotube-copper nanocomposites, J.

In this research work, resistance spot welded dissimilar joints of ferritic stainless steel and weathering steel sheets is investigated for mechanical and metallurgical properties.
Test specimens were subjected to tensile shear test and micro hardness test to assess the mechanical properties of the weld joints.
Welding current, time and electrode force are some of the important factors controlling the RSW process.
[9] M.Alizadeh-h, S.P.H.Marashi and M.Pouranvari, Resistance spot welding of AISI 430 ferritic stainless steel: Phase transformations and mechanical properties, Materials and Design,56 (2014) 258-263
[20] Y M.Alenius,P.Pohjanne,M.Somervuori and H.Hanninen,Exploring the mechanical properties of spot welded dissimilar joints for stainless and galvanized steels, Welding Journal, (2006) 305-313.

The mechanical and damping properties of the composites were analyzed by mechanics test, DMA and vibration beam method.
Results and discussion 3.1 Mechanical properties of materials By testing the mechanical properties, the results in Fig.1 show that the content of the carbon fiber have a greater impact on mechanical properties of the piezoelectric ceramic composite.
But when the content exceeds 0.33%, the composite loss factor begins to decrease and the damping performance degrades, because with the content increasing, the surface immersional wetting properties between piezoelectric ceramic, carbon fiber and EP resin become worse affecting the structure of composite materials.
Conclusion  In this paper，epoxy resin base piezoelectricity damping carbon fiber composite was prepared, and its damping properties, mechanical properties were analyzed.
Considering damping properties and mechanical properties, composite adding 60% nano-PT and 0.25% CF is the best and can be used as structural damping material.

The results show that the evaporation rate of the solvents is the most important factor affecting the final properties of the scaffolds.
In this article, we addressed one important factor in the molding processing-the solvent used, to investigate its effects on the structure and mechanical properties of the as received scaffolds.
Mechanical testing.
Average particle size of PLA, HA dissolved in different organic solvents Solvents Average particle size of PLA (nm) Average particle size of HA (nm) dichloromethane acetone chloroform 1,4-dioxane 368 273 2219 397 513 2354 925 708 There are three main factors affecting pores-generating process in our method, solvent evaporation and particle leaching help make micro pores while the foaming gas provides larger and interconnected ones.
The results suggest that the final properties of scaffolds are more affected by evaporation rate of the solvents.

Product with low cost, lightweight and enhanced mechanical properties were the main reasons welding dissimilar materials thrived by most of the industries.
The main objective of this study was to find out the weldability of these materials and investigate the mechanical properties of the welded butt joints.
In order to laser weld two dissimilar materials with two different metallurgical and mechanical properties, the selection of proper welding variables is very important [2].
The focusing parameter is mostly affecting the weld pool surface width.
The main factors affected the tensile strength and weld bead geometry were the peak power, Pp followed by the pulse duration, w.

The results showed that mechanical stress has affected the surface degradation of an insulation performance when the mechanical load is increased combined with high electrical field.
Surface tracking is occurred as result of many factors such as electrical effect, mechanical effect and environment etc.
One of the cause that affect the process is mechanical stress effect from the weight of cable.
The experimental, one can concluded that the weight of cable may produce the mechanical stress effect on the cable spacer surface that reduce the dielectric property.
The Effect of Environmental Factor on the Performance of Polyester Outdoor Insulators: Vol. 3.