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The mechanical properties of fibers exhibit considerable scatter, being affected by the natural variability in plant as well as the damage accumulated during processing.
Both damage in the form of kink bands [1-4] and geometrical variability are thought to affect the apparent longitudinal tensile strength of elementary flax fibers.
Model Mechanical damage.
Both factors are likely to contribute to the scatter of apparent fiber strength.
By contrast, the scale parameter, b, depends on the factor c relating the deterministic intact fiber strength fσ with its diameter; the value of c can be determined by, e.g., strength tests of intact fibers.

Compared with other reinforcement materials, glass fiber has advantages, as follows: low price, high mechanical properties, anti-oxygenic properties, thermal properties, fatigue properties [2,3], etc.
Fig.1 Mechanical properties vs. coupling agent content for 30%GF/PA66 treated by A1100+A+B Fig.2 The curve of tensile strength and strain-at-break of GF/PA66 vary with GF content Mechanical Properties.
Besides, other factors also have a important role in GF/PA66 composites, such as aspect ratio, diameter and length of fiber, surface roughness of fiber, chemical composition of fiber, etc.
Thermal Properties.
Glass fiber content can affect the mechanical and thermal properties: SGF in PA66 can improve the tensile strength, bending strength, heat-resisting temperature, but reduce the impact strength and strain-at-break. 30~40% glass fiber in PA66 matrix are better as to the mechanical and thermal properties.

This alloy keeps good mechanical resistance but it exhibits poor surface properties.
The mechanical properties of the coatings were evaluated by microhardness, and adhesion tests.
Al4C3 formation has been avoided, the mechanical properties have been improved and the reaction mechanisms are proposed.
The last measurements were made to investigate the changes of mechanical properties.
Lu, et al., Effects of silicon on microstructure, fluidity, mechanical properties, and fracture behaviour of Mg – 6Al alloy Effects of silicon on microstructure, Fluidity, mechanical properties, and fracture behaviour of Mg ± 6Al alloy, Mater Sci Technol, 17 (2013), pp. 204-214, 10.1179/026708301101509872 [21] N.

These fibres are the main factor for the modification of the MPCs thermal properties.
Then, the samples were analysed using different techniques to evaluate the different physical, thermal and mechanical properties of the different samples.
The effect of squared terms indicates a quadratic fit of the factors.
The range, factors and responses under study are properly adjusted to quadratic equations.
Preliminary study of the mechanical and hygrothermal properties of hemp-magnesium phosphate cements.

Such superior mechanical properties could be obtained by rolling the multilayer plate composed of a mixture of Teflon-Cu powder and a SPCC steel.
Results and Discussion The finite element simulation needs mechanical properties of a Teflon-Cu powder mixture and a SPCC steel.
The mechanical properties of a Teflon-Cu powder mixture depend mostly on the Cu content in a mixture.
Lancaster, Dry bearings: a survey of materials and factors affecting their performance, Tribology 6 (1973) 219-251 [2] S.
Lee, S-Y Hahm, Mechanical Property Changes in Drawing/Extrusion of Hardening Viscoplastic Materials with Damage, Int.

The thread rolling process is now widely acknowledged as the fastest and most efficient method of producing accurate external threads, with surface finish and mechanical properties.
In addition, because of the surface hardness and excellent finish, wear characteristics and anti-galling properties are greatly improved [3].
The factors on which the performance of the thread rolling die depends are proper design of the die, accuracy with which the die is made, selection of appropriate tool steel, heat treatment to achieve the optimum hardness and toughness.
Among them is the type of thread to be rolled, its major diameter, pitch and root depth that depends on surface roughness, diameter of blank and also on the ductility and cold-flow properties of the blank material (Fig.5).
Performance of Internal Thread Rolling Head and The Mechanical Properties of Rolled Thread, Proceedings of 6th International Advanced Technologies Symposium, 210-217

This study examines the influence of contact factors such as bearing deformation, contact width and contact pressure on cage slide in cylindrical roller bearings.
Some researchers investigated the influence of various factors on the cage slide of radially loaded cylindrical bearing elements.
Factors such as operating speed, oil viscosity, radial clearance, and bearing load were shown to influence cage sliding, as described by bones [11].
Nallusamy and R.Maguteeswaran, Microstructural analysis and experimental investigation of mechanical properties of epoxy based hybrid composite reinforced with flax, sisal and luffa fibre, Journal of ceramic processing research, 23 (2022) 498-502
Gopal, Influence of AlCoCrCuFe High Entropy Alloy particles on the microstructural, mechanical and tribological properties of copper surface composite made through friction stir processing, Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 235 (2021) 5555-5566

Inadhesion property of aluminum surfaces with bionic morphology Jing Li 1, Qiang Li1, Feng Du2, Wei Zhang1, Chunmin Shang1,* 1School of Mechanical and Electric Engineering, Changchun University of Science and Technology, Changchun 130022, China 2 Changchun Institute of Engineering and Technology, Changchun 130117, China * email: 467189762@qq.com Keyword: aluminum alloy; bionics; reducing adhesion; convex domes; non-smooth Abstract: The bionic inadhesion structures have been built on aluminum alloy substrates by the method of pressing based on the bionic reducing adhesion theory.
The factors influenced inadhesion property were studied.
Table 1 Chemical composition of aluminum alloy Chemical composition Cu Mg Si Fe Mn Zn Ti Gr Al Impurities Purity（wt%） 3.8-4.9 1.2-1.8 0.5 0.5 <0.9 0.25 0.15 0.1 Other 0.15 Table 2 Chemical composition of 45# carbon steel Chemical composition C Mn Si S P Cu Ni Cr Fe Purity（wt%） 0.42-0.5 0.5-0.8 0.17-0.37 0.01-0.035 0.017-0.035 ≤0.25 ≤0.30 ≤0.25 Other The characteristics of inadhesion surface are closely related to the properties of viscous medium.
Separation speed of both smooth sample and non-smooth sample affects adhesive force.
When the move speed of non-smooth sample is greater than 0.3mm/s, the adhesive force is affected but the value still lower than the adhesive force of the smooth surface.

The properties of PMCZ SiGe single crystal with different Ge concentrations were discussed.
The properties such as impurity distribution, mechanical property and infrared optical performance of PMCZ SiGe single crystal with different Ge concentrations were studied.
Infrared Optical Properties.
Table 2 Measure results of mechanical strength Mechanical Property.
Above all factors result in remarkable increase in mechanical strength of CZ-Si (Ge-doped).

However, CMMs are sensitive to environmental factors such as humidity, suspended dust and oil, vibrations, and especially temperature.
However, ambient temperature and temperature gradients are the most critical factors affecting CMM performance on the shop floor.
Because of these spatial and temporal gradients, in combination with thermal properties of the material used, shape and size of a machine will change in time.
Therefore, we mainly focused on two crucial factors that relate to temperature effects, i.e. material selection, loop structure.
Conclusion Coordinate measuring machines working on the shop floor were affected by environment factors and loop structure of the machine result in the inaccuracy, especially in large machines.