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Due to the low density, natural fiber such as kenaf fiber provides comparatively good mechanical properties.
Due to their low density and their cellular structure, natural fibre posses very good acoustic and thermal insulation properties and demonstrate many advantageous properties over glass or rockwool fibre example handling and disposal [2].
In summary, a comparative study of mechanical properties of kenaf fibre reinforced composites and other natural fibre are collected together.
Most of them are based study on the mechanical properties of composites reinforced with short and non-woven fibres [12, 13].
Studies On The Mechanical Properties Of Woven Jute Fabric Reinforced Poly( L -Lactic Acid) Composites.

Ltd, Shanghai, China awhjeff@yeah.net, b*jhwang@whut.edu.cn, cjiyundong@whut.edu.cn, dxufenghao1981@soho.com, eyyzyan@163.com, fsunjiuxiao2006@163.com Keywords: Optical Fiber; Carbon fiber; Different Diameters; Mechanical properties Abstract.
Thus embedded OF will alter the stress and strain in the vicinity of the embedded OF, destroy the materials’ integrality and continuity in some way, and even may degrade mechanical properties of composite materials [2,3].
Lee et al [5] evaluated the effects of embedded OF (φ125μm) on the tensile properties of unidirectional and cross-ply E glass-exposy system, and their results also showed no significant difference in the tensile strength.
Jensen et al [7] have investigated the reduction in compressive properties caused by the incorporation of OF in a graphite/bismaleimide matrix.
The bigger the OF is embedded, the more it affects.

Particular importance is the piezoelectric device's performance, the properties effectively displayed in piezoelectric ceramic composites.
The parameters perturbation of fibers can be the precursor to degradation of electro-mechanical properties.
It is achieved by studying the perturbations in the resonant frequencies of the backscattered amplitude spectrum, and correlating these perturbations to changes in certain properties of the fibers.
Fig. 2 Distribution of *zu vs. θ for various ka with 5 , 10µmaγ= = o In the following analysis, we will show the influences of the perturbations of material parameters on the *zu , which can be used as the precursor to degradation of electro-mechanical properties of 1-3 piezoelectric composites.
The theoretical model developed here can be used in conjunction with experimental techniques for the non-destructive evaluation of piezoelectric fibers and on-line monitoring of the variations of mechanical properties of 1-3 connectivity piezoelectric composites.

Therefore, the mechanical properties including the maximum allowable stress for this vessel is questionable after PWHT at 675 °C.
Bottom head section of the vessel Material Properties.
To overcome this issue, the PWHT is usually performed to regain or increase the mechanical properties of the welded part.
Some non-destructive tests such as insitu metallography, radiography, and hardness testing are usually carried out to assess the mechanical properties of the welded part.
FE analysis can be alternative way of assessing not only the global mechanical properties but also the integrity of the facilities after weld repair and PWHT.

Taguchi methodology is applied to make the association of these factors in optimization and through the observation of microstructure, hardness, wear-resistance and dilution rate to evaluate the effects of these factors on the hardfacing layer of the wear-resistant plate.
In Table 4, Torch moving distance (factor D) affects most on the surface hardness.
In table 5, Torch moving rate (factor C) affects the wear most.
In table 6, Working current (factor A) affects the most on the dilution rate.
Papadimitrio, “Synthesizing a Class "M" High Speed Steel on the Surface of a Plain Steel Using the Plasma Transferred Arc (PTA) Alloying Technique: Microstructural and Wear Properties”, Mater.

The chance to control the mechanical properties by controlling the balance of α" and β phases is only one of the advantages that has been observed in the TiNbSn alloys.
The cryogenic treatment has already shown to be effective to increase the mechanical properties of NiTi alloy by martensitic transformation [27].
Lou, “Microstructures and mechanical properties of Ti-Mo alloys cold-rolled and heat treated,,” Materials Caracterizations, vol. 62, pp. 931-937, 2011
Pereira, “Microstructure and mechanical properties of hot rolled TiNbSn alloys,” Materials and Design, vol. 56, pp. 200-208, 2014
Patoor, “Mechanical properties of low modulus β titanium alloys designed from the electronic approach,” Journal of the Mechanical Behavior of Biomedical Materials , vol. 3, pp. 565-573, 2010

Introduction It is well known that Ni-Ti shape memory alloys show attractive super-elastic and shape memory properties through martensitic transformation at specific temperature or under stress conditions.
Except for specimen 1, other nine specimens compose to three factors and three levels experiments.
When compressibility and recovery of specimen 1 are considered, post-treatments are important factors to improve the properties.
While the recovery is affected more by the ageing temperature, the pre-deformation is a non-significant factor.
Recovery is affected by ageing temperature more than other two factors.

Currently it has developed a method to improve the mechanical properties of aluminum by adding reinforcement to the aluminum such as aluminum composite material with reinforcing ceramic such as silicon carbide (SiC), alumina (Al2O3), and Carbon.
From Fig. 1 (a), it is showed that the volume fraction of reinforcement affect tensile strength of the composite.
In addition to the above, several other important factors leading to decreased tensile strength values ​​are uneven distribution of particles, the particles agglomerate and clustering reinforcement.
The existence of Al2O3 particle clumping in composites will affect the mechanical properties.
This will affect the properties of composites.

In general, energy absorption capacity of thin-walled tubes is considerably affected by principal factors like structural geometry, materials and loading conditions.
Auxetic foam material has gained popularity as a filler of thin-walled tube due to its enhanced mechanic properties compared with conventional foam.
The mechanical properties of square tube and foam core are given in Table 1.
The mechanical property of auxetic foam is adopted from Mohsenizadeh et al. [18].
Mechanical properties of aluminum tube and polyurethane auxetic foam.

To ensure the listed technical requirements for quality when forming friction surfaces, it is necessary to obtain optimal tribotechnical characteristics of the mating surfaces and high physical and mechanical properties [2, 4].
In this case, tribotechnical indicators were compared with the results of metallographic studies and the physical and mechanical properties of the modified layer, in particular, with the microhardness index.
The Mechanism of Wear of Hardened Surfaces While in service during wear friction, the working surfaces of the studied friction pair are affected by force and temperature factors.
It depends on the wear conditions, physical-and-mechanical and tribological properties of the mating materials.
These circumstances largely explain the mechanism and the main factors determining the increase in the tribological properties of the studied friction pair during laser thermal strengthening, namely, by increasing the bearing capacity, increasing microhardness, and improving the wear conditions of the modified layer.