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The alternating pressure of seawater can also affect the lifetime in deep-sea environment and probably is conducive to synergistic effects with other ageing factors.
Introduction In natural seawater environment, temperature and chlorine ion are well-known factors for organic coating degradation [1-6].
Many studies dealt with the effect of one factor and some of them, included the combination of two or three of these factors.
To date, there has been few works investigating the influence of alternating pressure of seawater on the protective properties of organic coating.
This value was very low, and the coating could be considered as losing its protective properties.

The mechanical properties of self-healing composite gear with microcapsules can be effectively improved.
The comparison of results shows that modulus ratio is one of important inflencing factors on the natural frequency of a gear.
Mode is the natural vibration property of mechanical structures[3].
Modal analysis is used to determine the vibration properties of machine structures or parts, including natural frequency and modal shapes, as important reference in designing, especially when the structures or parts experience dynamic loads.
Consequently, modulus ratio can be viewed as one of important parameters affecting the natural frequency of different materials.

Introduction Heat transfer in saturated porous medium concerns three factors which are thermal, hydraulic and mechanical.
Table1 Material Properties Parameters Values Units Parameters Values Units H 10 m n 0.4 --- T0 10 ˚C μ 0.3 --- E 10 MPa cs 1.2 J∙ (g∙˚C ) -1 αs 2×10-4 ˚C -1 cw 4.2 J∙ (g∙˚C ) -1 αw 4×10-4 ˚C -1 ρs 2.6×106 g∙ m-3 According to the Table.1, some coefficients such as C, αu , Es, β,A can be computed.
It shows that considering thermo-mechanical coupling hardly affected the excess pore- water pressure.
It also showed that thermo-mechanical coupling hardly affected the temperature increment.
(2) Many factors can affect the behaviour of the thermal consolidation for saturated soil.

Applied mechanical stress has a strong influence on magnetic properties of material.
The application of a tensile stress to magnetic material affects its magnetic properties and results in different magnetic induction for a given magnetic field at a different level of the applied stresses.
The magnetic property of magnetic materials under applied mechanical stress is very complicated.
The apparatus of the magnetic measurement contains one computer to measure the magnetic properties.
Fig. 6 Magnetization curve and hysteresis loop under tensile stress Conclusion The magnetic properties of magnetic materials vary with the application of stress, so the stress should be ranked with magnetic strength and temperature as one of the key factors affecting magnetic characteristics.

Introduction Fiber-to-yarn conversion process has been affected by several factors which include the properties of raw material, level of technology, machinery, and skill of the machine operators.
Fiber length showed a moderate effect, while fiber stiffness revealed the lowest effect on yarn neps count compared to the other two factors [1].
Results and Discussion Based on empirical data that evaluated cotton fiber quality parameters and yarn quality data produced from corresponding cotton fibers, the sensitivity analysis showed that cotton fiber characteristics are the key factors affecting yarn properties.
Effect of Cotton Fiber Strength on Yarn Strength The relationship between the strength of cotton fiber and the tensile strength (B-Force) of the yarn is an important factor in evaluating the quality and physical mechanical properties of the yarn.
These short fibers can easily protrude from the yarn structure, creating hairiness and affecting the quality of the yarn.

This study aimed to determine the significant factors affecting surface roughness and to obtain the optimal machining operation in turning process.
Over decades, many researchers have investigated the effects of machining factors on the quality characteristics and the mechanical properties of the machined part using design of experiments (DOE) and response surface methodology (RSM).
Thomas and Antony (2004) used this method to identify the significant factors affecting the joint strength of honeycomb composite tongue and slot joints for aerospace applications [7].
Identify machining factors affecting surface roughness and assign two levels to each machining factor (existing level (-) and proposed level (+)) 2.
This implied that factor A (i.e., set of the cutting tool angle) was the only significant factor affecting average surface roughness.

The compressive residual stress could be induced by LSP, which further significantly affects materials surface properties.
The main factors of LSP, which affect the surface properties of alloys, such as surface roughness and residual stress gradient, are studied and analyzed in present study.
Introduction Laser shock processing (LSP) is a cold-working surface treatment process designed mainly to improve surface mechanical properties and fatigue life of materials [1].
The residual stress distribution in sub-surface layers (less than 10 µm in depth) is a very important factor that affects structural properties of materials.
However, factors of apparatus' rotation for stress analysis increase the errors of this method.

From the experiments, it could be found that the most important factor affecting the flexural strength is the steel fiber volume fraction, and then the types of steel fiber, the water cement ratio, and the quantity of light aggregate in the order.
Ceramsite, the mechanical properties is shown in Table 1.
Table 1 Ceramsite mechanical properties Grain size(mm) 1h bibulous water 24h bibulous water Bulk density kg/m3 Cylinder pressure strength(MPa) 5~20 1.4% 2.2% 840 8.7 Steel fiber: Three models of steel fiber is shown in Fig. 1, and the performance is shown in Table 2.
For this test, four factors and five kinds of levels (shown in Table 3) is considered, orthogonal test method is adopt, and L25 (56) orthogonal table is used ,25 groups concrete specimens are made.
Table 3 Factors and levels Factors levels 1 2 3 4 5 A Water-cement ratio 0.5 0.45 0.4 0.35 0.3 B Lightweight aggregate content 20% 40% 60% 80% 100% C Steel fiber volume content 0% 0.5% 1.0% 1.5% 2.0% D Steel fiber types JG XB JB JG XB Test Results and analysis Steel fiber combined aggregate concrete flexural failure properties.

The mechanical properties of each hardfacing layer are tested and the microstructure is analyzed.
Four factors are carbon (A), chromium (B), Erbium (C) and cerium (D).
Experimental results and analysis Mechanical properties of hardfacing layer.
Microstructure and properties of hardfacing layer.
Because of the lack of consideration for the rare earth elements` transition in this experiment, there are less carbides than expected, affecting the experimental results.

The main factors affecting the surface roughness and the erosion mechanisms related to material removal were analysed.
It is found that abrasive mesh, water pressure and jet incidence angle are the main factors affecting the surface roughness.
The main factors affecting the surface roughness and the erosion mechanisms related to material removal were analysed.
As shown in Table 1, a 4-factor and 3-level orthogonal test was carried out to determine the main factors affecting surface roughness and to analyze the erosion mechanisms of quartz crystals.
The research results reveal that abrasive mesh, water pressure and jet incidence angle are the main factors affecting the surface roughness.