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The flame retardation properties, mechanical properties and wear behaviors of PANOF plain weave fabrics were tested.
Results and Discussion The mechanical properties of PANOF plain weave fabrics.
As a flame retardant fabric, it must meet the required mechanical properties.
The mechanical properties of the PANOF plain weave fabrics are shown in Table 2.
The fiber is the dominate factor affecting fabric combustion properties.

However, MMC is significantly affected by the interface under the transverse loading.
MMC offers the potential of having outstanding mechanical properties unobtainable in conventional metals because under longitudinal loading the material makes full use of the high strength fibers.
The properties of continuous fiber reinforced MMC are significantly influenced by the properties of the fiber/matrix interface.
The interface boundary consists of the multi thin layers with other mechanical properties linearly.
Table 1 shows the mechanical properties of the SiC fiber and Ti-15-3 matrix of the three thin layers with variable properties.

Affecting Study on Flow Regeneration Noise from Muffler Element with Perforated Plate Haijun ZHAO1,a, Guohua WANG1,b 1Department of Mechanical Engineering, Luoyang Institute of Science and Technology, Luoyang 470023, China ahjzhaoly@sina.com, b360220177@qq.com Key words: Flow regeneration noise; Sound power model; Muffler element with perforated plate; Effect Abstract.
In order to reduce the impact of complex factors, quantitative relationship between flow regeneration noise and structure parameters and external conditions need be built, it need research to simplify the muffler structure.
In this paper, the relationship model on flow regeneration noise power of muffler element with the perforation plate and the structure parameters, the external conditions will be built on dimensional analysis, and the factors affecting analysis of flow regeneration noise will be performed, and important support will be provided for muffler design.
Every structure parameter is considered as a factor, 6 factors have 2 level respectively, if all combinations are produced, it will have 64 structures.
Experimental determination of acoustic properties using a two microphone random excitation technique.

The major factor affecting the properties of nanocomposites is the synergistic advantage of “nano-effect” relative to large-scale modification.The nanoscale additives can alter the properties of the material.In the polymer matrix, the inclusion of nanoparticles with high surface area high surface energy and often with anisotropic geometry reduces the interparticle distance and improves polymer matrix interaction strength.
The thickness of the interphase region is affected by several factors like flexibility, energy of adsorption, and the extent of polymer chain entanglement.
It can be remolded and reused without affecting the properties.Thermoplastic materials are including as metals, ceramics or polymers [14].
These kind of polymers have better mechanical properties, high chemical and heat resistance properties.
Coating thickness generally based on process factors including dipping time, temperature, nature of surfactant, pureness of nanomaterial, etc.

Thus, the phosphorus content is below 0.15% for the requirement of casting mechanical properties.
However, excessive overheating not only wastes energy, but also decreases mechanical properties.
To ensure higher mechanical properties of casting, a large number of scrap steel is adopted in foundry instead of pig iron.
Different charge ratios have different effects on mechanical properties of cast iron.
Chemical composition confirmation should depend on the weight of the castings, wall thickness, complexity of the shape, the requirement of mechanical performance and other factors.

The results of the calibration showed few dispersed errors, and the main factors of this dispersion may be related to the geometry of the specimen and with variations in current flow density, which is influenced by corners and edges and by the presence of pick-up inductive.
When an alternating current flows through a metal conductor, the current is maintained at a thin surface thickness, which depends on the frequency, f, and the physical properties of the conductor.
Some factors are essential in the success of the ACPD measurement, among which may be the correct positioning of the signal reading cables, appropriate current and frequency parameters, sample geometry and temperature variations.
Therefore, the application of the technique is totally dependent of a precise calibration, relating the measured output voltage to the crack length, the output voltage response being totally dependent on the sample geometry, the positioning of the wires and other external factors, such as temperature.
The tunneling effect ends up affecting the crack length measured by the ACPD equipment, presenting mean values below the actual size.

Warping deformation is a common and challenging issue in injection molded products, affecting their appearance and performance [4].
The properties of the plastic determine the cooling process's efficiency, the plastic parts' thickness, and the injection molding process conditions.
Table 1 shows the material properties.
Tab. 7 DOE-1 Factor level table Control Factors Level -1 0 1 A.
Optimization of injection parameters for mechanical properties of specimens with weld line of polypropylene using Taguchi method.

Design of experiment techniques has been used for different effective welding parameters (laser power, welding speed, and focus position) to optimize the dissimilar F/A joints in terms of its mechanical properties.
Three factors with five levels each (L-25) were employed in these models.
Hence, the most important mechanical property in this case is the impact strength [8].
ii) Laser power is the main factor affecting the response.
v) The model developed can adequately predict the response within the factors domain.

It has moderate carbon content and excellent comprehensive mechanical properties, such as high strength, good toughness, and excellent weldability.
Its chemical compositions and mechanical properties are shown respectively in Table 1 and Table 2 according to GB700-88.
C Si Mn P S 0.12－0.20 0.12－0.30 0.30－0.67 ≤0.045 ≤0.050 Table 2 The mechanical properties of Q235B steel.
The crack growth rates were higher in the welding fusion zone due to its poor mechanical properties and non-uniform structures
Dynamic Stress concentration factors.

Effects of the pH value of addition stage, the pH value and the temperature of polycondensation stage on the properties of the resin were analyzed.
In the synthesis of urea-formaldehyde resin adhesive, the pH of the addition stage, the pH and temperature of polycondensation stage are important factors that affect the resin synthesis, while it plays a decisive role in the structure of the main product of the various stages, quality and performance of resins [2].
In this paper, above factors are studied on the basis of improvements of urea-formaldehyde resin formulation[3], the optimum process are selected, the free formaldehyde content are further reduce.
Instrument: 6511 electric mixer LND-1 paint-4 coating viscometer Y33-50 500KN hot press, MWD-50 Mechanical Tester.
Each factor was taken three levels and L9 (34) orthogonal scheme was used for the test.