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Factors affecting results obtained by tests and models and influences of actual structural conditions are overviewed.
The significance of factors affecting tests, model results and actual structural conditions depends substantially on an analysed structural member.
Factors affecting the uncertainty related to resistance models.
Examples of factors affecting the uncertainty related to resistance models are given in Table 1.
Examples of factors affecting the uncertainty related to resistance models.

Especially for mechanical properties test in heat affected zone of welding joints.
Introduction Nowadays, hardness test and mechanical properties test are commonly employed for testing mechanical properties of steel pipeline welding joint.
Thus, it is suitable for the study on local mechanical properties of material, especially evaluating the mechanical properties or rupture toughness of welding joint.
Basic mechanical properties of metal, e.g. strength, hardness and plasticity, etc., depend mainly on the chemical composition, organizational structure , metallurgical quality, involved stress, surface and internal defects, and other internal factors of material.
Micro Test Methods for Mechanical Properties of Metal.

The results show that Si, Cu and Mg affected the mechanical properties (tensile strength and elongation rate) at 250 ˚C most significantly, minimally and negatively, respectively.
Therefore, their high-temperature mechanical properties should be improved.
Table 1 lists the factors and the corresponding levels.
However, the elements interact in the multi-element alloy system, which directly impact the mechanical properties of Al alloy.
Muzaffer, Effect of copper and silicon content on mechanical properties in Al–Cu–Si–Mg alloys, J.

For the case of mechanical and wear resistance properties, the increasing of SiO2 particle of 0.5-1 wt.% affect to increased various mechanical properties to have a highest value and lowest wear rate as compared with initial UHMWPE up to 1.7 times.
After that, the increasing of SiO2 particle affect to mechanical properties and wear resistance were decreased, except for the hardness that continuously increased according to the increasing of SiO2.
In addition, the mechanical properties and work conditions are important factors in determining the wear characteristics of polymer such as compression load, surface roughness and so on [6].
For example, the studied effect of mechanical activation of UHMWPE on its mechanical and tribotechnical properties [8], found that mechanical activation can improve mechanical properties and help to decrease the wearing of UHMWPE.
Mechanical properties of initial UHMWPE and UHMWPE composites.

It can be found that tempering temperature is the major factor which affects the mechanical properties.
To explain the effects of heat treatment parameters on mechanical properties, the average mechanical properties and range of every factor at different level are calculated and shown in Table 5.
Quenching process affects the mechanical properties by affecting solution strengthening and grain strengthening synthetically.
Table 5 shows that tempering is the main factor affecting the mechanical properties of 10Cr12Ni3Mo2VN steel.
(2) The tempering temperature is the main influencing factor on the mechanical properties of 10Cr12Ni3Mo2VN steel.

The basic physical properties (bulk density, matrix density, open porosity), mechanical strengths (compressive strength, bending strength) and water vapour diffusion resistance factor belong to the studied properties.
Mechanical properties.
The open porosity as one of the most important characteristics of building materials which affects both mechanical and transport properties of materials showed a slight decrease during the studied time period, ranging from 7 to 4%.
Open porosity of studied plasters Mechanical properties.
Černý, Commercial renovation renders: mechanical, hygric, thermal and durability properties, Cem.

The proper synergy between AP and the adopted mechanical refining was the factor that triggered the liberation of nano-cells from EFB biomass and this had ultimately improved paper properties.
Different AP treatment would affect refining impact and thus, affect paper properties.
SEM revealed the factors behind the sheet strength and refining energy consumption.
Thomas, Oil palm fibers: morphology, chemical composition, surface modification, and mechanical properties, J.
Leary, Alkaline peroxide mechanical pulping of wheat straw part 1: factors influencing the brightness response in impregnation.

The mechanical properties of the yarns are affected by those of the individual fibers.
In addition, Stamboulis et al also found that the mechanical properties are affected by the fungus development due to the time the fibers are exposed to humidity [48] [36].
Moreover, a dispersion on the mechanical properties values of jute yarns depends of several factors such as difficulty to obtain cross-section aera of yarn, number of fibers bundle continue and the many factors related directly of the fibers bundle mentioned before (fig. 4 (a)).
Water affects also the mechanical properties of the natural fibers which is discussed in [3] and [50].
Cheng, Jute yarn-wound composites: Optimization of methods for evaluating mechanical properties and improvement of mechanical properties, J.

ahanlihong@cnpc.com.cn Keywords: complex fracturing; perforation; casing; mechanical properties Abstract.
Meanwhile, the casing mechanical properties will be affected by the blasting process; therefore, it is very important to study casing residual strength with the perforation completion process.
Chen [7], Li Jun [8] and Lian Zhanghua [9] have preliminarily analyzed the causes and mechanism of casing deformation failure in the shale gas well complicated fracturing process in Changning and Weiyuan block , and it has been found that the principal influence factor affecting the casing deformation is shear load.
It is believed that the temperature stress is caused by the change of the reservoir temperature, at the same time, the performance of casing mechanical properties are changed due to high temperature.
Perforated Casing Mechanical Properties Considering that the mechanical properties of the casing containing defects can not be determined through the physical simulation test, the geometrical size of the perforated casing string is determined by the test method, and the mechanical properties of the perforated casing string are determined by the numerical simulation method, and the technical support for the optimization design and selection of the casing string in the oil and gas field is provided.

The influence of combined factors of MWCNT filler content and the irradiation on the tensile stress-strain properties at 25oC and 50oC and gel fraction was analysed.
The temperature dependence of stress-strain properties more clearly indicated the pronounced impact of tensile properties due to formation of macromolecule cross-linked bonds that affected reduction of deformability due to the reduced mobility of macromolecules.
The results of the studies indicate notable dependence on mechanical properties on the irradiation by accelerated electrons in the presence of carbon nanotubes as the filler.
Svobodova, A comparative study on the electrical, thermal and mechanical properties of ethylene–octene copolymer based composites with carbon fillers, Mater.
Surip, The effects of gamma treatment on the mechanical properties of thermoplastic natural rubber hybrid nanocomposites, Compos.