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Out of these options, GFRP wraps have become more important because of their superior mechanical properties, effortless application, and cost-effectiveness [5] [6].
In a different study, Dyer et. al. [8] examined the mechanical properties of composites are strongly influenced by fiber orientation, which in turn affects their capacity to withstand different stress situations.
This research focused on the combination of fiber orientations in GFRP such as unidirectional, bidirectional, and multi-axial, influence the mechanical properties and effectiveness of the repair, impacting the pipeline's ability to withstand internal pressures.
The finding indicates that the orientation of fibers significantly influences the mechanical properties and effectiveness of the composite wrap.
Ilyas, “Unveiling the physico-mechanical properties of kenaf yarn fiber-reinforced acrylonitrile butadiene styrene composites: Effect of quasi-isotropic lay-up sequences,” Polym.

For example, Wang Min predicted the quality of welded joints by the neural network, and experimental results also are desirable [5]; Buffa G [6] established a neural network prediction model of the weld grain; Dong Junhui[7] used an adaptive fuzzy neural network to predict mechanical properties of welded joints successfully, in which the tensile strength of welded joints, bending strength and elongation and other mechanical properties were more accurately predicted.
In order to facilitate research and minimize the impact of nonlinear factors, this paper only established the neural network model between the welding parameters and temperature field.
During this process, the factors which affect the quality of weld include: thickness, shape of friction stir, rotation speed, the amount of the pressure, welding speed and thermal conditions.
Mechanical property prediction of welding joint based on artificial neural network for titanium alloy [J], Aeronautical Manufacturing Technology. 2009, 16:79-81
Mechanical property prediction of welding joint based on fuzzy-artificial neural network [J].

But it has been reported that the functionaliation of CNTs has usually an enhancive effect on mechanical properties and detrimental effect on electrical conductivity [12].
With regard to these objectives, the authors intended to optimize the milling-time to increase the mechanical and electrical properties.
Kim, Effects of surfactant treatment on mechanical and electrical properties of CNT/epoxy nanocomposites.
Schulte, Infl{TTP}-1278 uence of diff{TTP}-1280 erent carbon nanotubes on the mechanical properties of epoxy matrix composites – A comparative study.
Ma, Effect of elastomeric nanoparticles on properties of phenolic resin.

Introduction Compacted graphite iron (CGI) is considered to be one of the most promising material and have an increasing demand in both automotive and locomotive industries due to its unique physical and mechanical properties.
Coating techniques is also used to improve the hardness and were resistance of cutting tool, as well as decrease the friction coefficient of the tool-chip interface, result in a better comprehensive properties of the tool[3].
Wang Yongguo et al.[17] established a carbide gun drill force system by the integration of forces on the main cutting edge, wear pad and outer diameter (OD) relief, and the mechanical equilibrium equations, applying specific energy model, which consisted of the geometry parameters, machining parameters, and material properties.
While all above the studies greatly improved the knowledge of CGI machining performances, wear mechanisms of the tool, or the factors affecting tool life.
The chemical composition (wt%) and mechanical properties of workpiece material are presented in Table 1 and Table 2 respectively.

The study concerns the welding of wood-plastic composites and the impact of their properties on weldability.
Various materials were tested to find out which material properties affect in which ways.
The purpose of the study was to obtain information on how different material properties affect the welding processes and which of the processes are the most promising methods for WPC joining.
According to Baudrit et al., the additive seemed to improve the strength properties.
Hot plate welding has remarkably better properties, however.

The presence of these pores creates stress raisers which can lower the mechanical properties of the composite, and is therefore undesirable.
Transformation Volume Change (%) β-quartz  α-quartz 0.82 - 1.3 Α-quartz  α-tridymite 14.4 - 16.0 α-quartz  α-cristobalite 15.4 - 17.4 γ-tridymite  α-tridymite 0.4 - 0.5 β-cristobalite  α-cristobalite 2.0 - 2.8 Factors Affecting the Crystallization Rate of Fused Silica.
Carbon-carbon composites have superior mechanical properties and are able to retain these even at elevated temperatures of up to 3000oC.
Hench: Physical Chemical Factors in Sol--Gel Processing.
[132] Crivelli-Visconti, I., Cooper, G.A., Mechanical Properties of a New Carbon Fibre Material, Nature, 1969, 221(5182): p. 754-755

Introduction With the progress of material science, engineering ceramics are playing an increasingly important role in the fields of modern manufacturing industries, astronautics, electronics and precision mechanical engineering because of their superior physical and mechanical properties [1].
However, because of their high rigidity, high brittleness and different physical and mechanical properties from metal material, it is hard to process such materials with high efficiency and good quality.
Especially, ultrasonic vibration machining (UVM), not affected by electricity and chemistry property of workpiece material, is suitable for the precision processing of engineering ceramics [4, 5].
Table 1 Mechanical properties of nano ZTA ceramic Density (g/cm3) Bending strength (MPa) Microhardness (HV10) Fracture toughness (MPa.m1/2) Elastic modulus (GPa) 4.6~4.99 650~900 2200~2400 6~7.6 285 Experimental equipment and measurements.
Box-Behnken design is a kind of method for evaluating the nonlinear relationship between index and factors.

Amount of the mineral dry-shake topping affects mainly on the abrasion resistance, which is critical for the real life of the floor.
The relation can be defined as follows: y = -1.7684x + 33.553 (3) Experimental Procedure 3 – Determination of Influence of the Used Amount of Dry-shake Topping on Resulting Adhesion Properties of the Surface Finish The aim of this experimental procedure was to determine whether the particular amount of dry-shake topping can influence the resulting adhesion and cohesion properties of the entire floor structure, i. e. the adhesion to the base slab.
Moreover, it was observed that the amount of shake-ins is not the crucial factor for trowelled floors.
The main advantage of power trowelling is the resulting compact and smooth surface finish with very good cohesion and adhesion properties to the base.
On the contrary, only small effect was observed when considering the water absorption of the tested material and absolutely inconsiderable influence was observed in test of adhesion properties.

The research on the corrosion and its effect on the mechanical properties of rebar are increasing [8-12].
These will affect the mechanical properties of rebar.
Li, Effect of corrosion on mechanical properties of reinforcing bar HPB235, Advanced Materials Research, 450-451 (2012) 201-204
Wang, Mechanical properties of rebar HRB400 after corrosion, Advanced Materials Research, 753-755 (2013) 516-519
Li, Effect of corrosion on mechanical properties of rebar HRB335, Advanced Materials Research, 753-755 (2013) 539-542.

From the obtained results it is not easy to conclude a definitive conclusion or to set the boundaries between the factors that are responsible for wear resistance.
The small particles of sand and rocks affect as small abrasive particles which destroy the pressing tool by several wear mechanisms [3].
A very important factor in the pressing of a briquette is the pressing temperature which should be from 80°C to 220°C [1,3].
According to [1] it is desirable that the pressing temperature is in the range from 160°C to 220°C, because the mechanical properties of the briquettes and their other properties (heat value) are very plausible.
It happened because the nitrided layer contained the so called ε phase and so called grids of nitrides, which degraded the mechanical properties of the layer as a result of different chemical composition on the edge of the carbides and the steel matrix.