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ramie fiber with coupling agent can improve the anti-thermo-oxidative properties of the composites.
Introduction Natural fiber is abundant and has proper properties,it has been widely used to form “green” composites [1-3].
Thermo-oxidative aging The thermo-oxidative aging tests of the composites were carried out.The mechanical properties,color stability and thermal properties of the composites were measured when the composites were aged for 0,500,1000,1500 and 3000h Flexural tests Flexural properties of composites were determined using a MTS Universal Mechanical Tester(model CMT4204).Three-point bending tests were carried out following ASTM D790 standard[6] methods.Impact strength was measured in an impact tester(Charpy) according to ASTM D6110.All the results were taken as the average of five samples.
Results and Discussion Effects of the treatment on mechanical properties of the composites The flexural properties of different composites at different aging stages are shown in Fig.1.The flexural strength and modulus of the unmodified composites(UC) before aging are 30.17MPa and 1628MPa respectively,while those of the modified composites(MC) are correspondingly increased by 15.9% and 21.7% to 34.96MPa and 1928MPa,indicating that treating the ramie fiber with KH550 is good for the improvement of the flexural properties of the composites.
,in a composite,the aging may happen to not only the matrix,but also the reinforcement,and even the interface.In addition,the aging of the material will affect the diffusion and comsuption of oxygen in the material,as a result,the crosslinking density of the molecular chains inside a material is affected,which has effects on the properties of the material.

In the present work, three dimensional finite element analyses have been carried to understand the effects of adhesive properties on active repair performance of a cracked aluminium plate under mode I.
The present study investigates the influence of adhesive properties on active repair performance using piezoelectric actuator on a cracked aluminium plate subjected to a uniform tensile stress under Mode I linear-elastic fracture mechanics (LEFM).
Numerical Fracture Analysis 3.1 Material and Geometrical Properties Fig. 1 shows the specimen used in the present study.
Table 1, shows the material properties for the aluminium plate, adhesive, boron/epoxy, and piezoelectric actuators.
The results showed that the adhesive shear modulus affects the active repair efficiency significantly.

Result of fabrication process will be identified and measured using digital microscope and surface roughness tester to get the value of workpiece quality such as surface roughness and geometrical properties as the dependent variables.
The result of the analysis shows that the power of Laser (P) and velocity of Laser nozzle movement (V) effect is the significant variables affecting the quality of micropattern and micromold fabrications.
Majority of this process is focused on small parts, with low heat without changing its material properties [1].
The level of variables chosen for the design of experiment No Variables Unit Indeks Level -1 0 1 1 Focus distance mm F 27 29 31 2 Laser power Watt P 6 7.2 9 3 Velocity of nozzle movement mm/s V 50 90 130 Result and discussion The coefficients of the main effect (β1-3) and factors interaction (β4-9) have been estimate from the experimental result by computer simulation programming using MATLAB.
Figs 5-6 shows the 3D response surface for the the geometry properties (D1 and W1).

Although slightly porous structures can attain static properties equal to those of fully dense materials [4–6], a notable decline in dynamic properties is observed in materials fabricated using laser powder bed fusion (LPBF).
For instance, Solberg et al. [7] highlighted material porosity as the primary factor affecting the fatigue limit of LPBF 316L in rotating bending fatigue.
Given the absence of significant defects, it can be inferred that the failure initiates at microstructural features being closely related to the strength properties.
The findings contribute to a better understanding of the factors influencing fatigue behaviour and can guide the design and optimization of additively manufactured components for enhanced fatigue performance.
Fortunato, Effect of selective laser melting (SLM) process parameters on microstructure and mechanical properties of 316L austenitic stainless steel, J Mater Process Technol. 249 (2017) 255–263. https://doi.org/10.1016/j.jmatprotec.2017.05.042

People living in the coastal areas most probably suffer from water shortage problem and the only best practised method was found to be solar desalination.Geometry of the solar still is one of the key factors that influence the performance of solar still.
Table 1 describes the different latent heat storage PCM with their thermo-physical properties.
Ahsan, ―Factors affecting the performance of triangular pyramid solar still, Desalination, vol. 344, pp. 383–390, Jul. 2014
"Erratum to'Factors affecting the performance of triangular pyramid solar still'[Desalination 344 (2014) 383-390]."
Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 225, no. 5 (2011): 1203-1212

The study clearly depicts the gradient nature in the structure and mechanical properties of the FGM castings produced by centrifugal casting method.
Heat treatment improves the hardness as well as other mechanical properties due to the redistribution of Cu-Al2 phases [8].
[3] Chirita, G, Stefanescu, I, Centrifugal versus Gravity casting techniques over mechanical properties, Anales de Mecánica de la Fractura , 1 (2006) 317-322
[8] Li Z, Samuel A M, Samuel F H, Ravindran C, Valtierra S, Doty H W., Factors affecting dissolution of Al2Cu phase in 319 alloys, AFS Trans, 2 (2003) 241–254
[10] Barresi J, Kerr M J, Wang H, Couper M J, Effect of magnesium, iron and cooling rate on mechanical properties of Al–7Si–Mg foundry alloys, AFS Trans, (2000)563–570

It is well known that the texture evolution mechanisms in TiN thin films are influenced by factors such as strain energy, surface free energy, surface diffusivity and adatom mobility.
Also, it is known from previous studies [8,9] that the mechanical properties of TiN film are strongly affected by its preferred orientation, residual stress, and grain size.
These properties were mainly depends on the processing parameters.
There are some factors which may influence the increase in hardness of these coatings, such as the crystallite size, orientation and internal macro stress.
Hence, these adequate nanocrystals formation in higher N2 concentration influences the increase in the mechanical properties of the coating.

Introduction Metal plastic forming process has two major advantages of meeting shape requirement and improving mechanical properties, especially for forging process.
As is known to all, mechanical properties are related to the microstructure for a structure part.
Therefore, controlling microstructure of both gear surface and shaft part is as essential as their forming during forging a gear shaft for getting a gear shaft product with comprehensive mechanical properties.
The prediction of microstructure and properties of the gear shaft is useful for actual production.
Punch speed was also an important factor which directly affected the strain rate and the temperature field distribution, and further affected the recrystallization.

There are many factors affecting the steel structure corrosion in the splash zone, such as corrosion problems caused by seawater and effect of impacted brought by the ocean wave.
The corrosive damage of the steel structure will also affects the safety in production, even results in discard ahead of time.
Zn15Al coating also has good mechanical properties.
That is to say the combination property of Zn15Al coating is better than that of pure zinc coating and aluminum coating.
Although FeBSiNbCrMn amorphous coating has a poor corrosion resistance, but its has high hardness; 2) The selectivity of the anticorrosion and wear-resistant coatings for steel used in splash zone were enriched through the contrasting study of the properties of the four high-velocity arc spraying coatings.

Introduction The research on the concrete-filled rectangular steel tube at home and abroad mainly focus on the mechanical properties and seismic performance of component.The studies of frames structure made of rectangular concrete filled steel tube columns and beams has not been reported [1] [2] [3].
In order to research the mechanical properties of concrete-filled rectangular tubular frames, In this paper, a three dimensional nonlinear finite element analysis model of concrete filled rectangular steel tubular frame was established.
The bearing capacity, ductility, energy dissipation and other mechanical properties of concrete-filled rectangular tubular frames can satisfy the requirements of seismic ductility of frame, and the frame under cyclic loading can form the beam hinge failure mechanism.
These factors may lead to that the experiment bearing capacity include a part of the resistance of the device, so as to obtain the experiment value is higher than the theoretical bearing capacity.
In order to study the effect of axial compression ratio for the concrete filled steel tubular frame mechanical properties and failure mechanism, different axial force role the theoretical model of frame.