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Although the above studies have improved the stress distribution and mechanical properties of CFRP single-lap joints to some extent, there are still some shortcomings.
The material properties are shown in Table 1.
The material properties are shown in Table 2.
T300/7901 Material Properties Elastic Modulus Value Damage Properties Value E11/MPa 138000 Xt/MPa 2000 E22/MPa 11000 Xc/MPa 1150 E33/MPa 11000 Yt/MPa 60 v12 0.28 0Yc/MPa 152 v13 0.28 SL/MPa 75 v23 0.4 ST/MPa 75 G12/MPa 6000 ρ/(T/mm3) 1.69 G13/MPa 6000 Gnc/(N/mm) 0.34 G23/MPa 3700 Gtc,Gsc/(N/mm) 0.38 Table.2.
These factors result in large structural dispersity.

Fig.1 Machine tools Fig.2 Fixture and nozzle WJISMF process parameters optimization In addition to the mechanical properties of the sheet and the diameter of the nozzle, WJISMF main process parameters include: high water pressure, feed rate, target distance, nozzle feed rate.This thesis focuses on analysis of the experimental data on the forming process and how to select appropriate process parameters, which is an important condition to ensure the success of WJISMF.
Target distance has limited impact of experimental factors, so it is a secondary factor.The study showed that the best target distance is between 5mm-15mm,in this interval the forming force keep unchanged.
Fig.3 Pressure effect on deformation depth Fig.4 Speed effect on deformation depth Spacing mainly affect surface quality.
WJISMF depth control is difficult, the water pressure, target distance , feed rate and other factors must be coordinated.
Beijing: Mechanical Industry Press,(2011) 21-23

It controls drop size by changing pulse periodically to reduce pore and crack possibility, and improve the properties of weld pool.
Consequently, the welded joint obtained good toughness, but the metal transfer process was affected by many factors.
Chinese research institutes and universities researched surface forming of welding seam, microstructure and performance of welding interface, mechanical properties of aluminum alloy lap joints, aluminum alloy and galvanized steel sheet lap joints, those were welded by arc braze welding.
The arc could preheat and postheat workpiece, increase the absorptance of workpiece, improve clearance bypass ability and properties, reduce the accuracy of machining equipment.
Interfacial microstructure and mechanical properties of aluminium–zinc-coated steel joints made by a modified metal inert gas welding–brazing process [J].

Introduction Silver is widely used in the metal processing industry because of its exceptional characteristics that include good conductivity and good mechanical properties [1].
This technique has being used for a long time, and its efficiency depends on several factors like the availability of concentrated solutions near the cathode surface.
increase in solution movement becomes a dominant factor.
In groups C and D, it was seen that further additions of conductivity salt do not affect significantly the ion mobility.
References [1] Metals Handbook Vol.1, Properties and Selection of Metals, American Society for Metals, USA, 1961, p.1180

They evaluated mechanical properties such as hardness, tensile strength and % elongation of pure PTFE and different PTFE composites with varying filler concentration.
The results demonstrated that the abrasive size was the main contributing factor, which can drastically impact the wear mechanism and tribological properties of tribo-pairs.
Wang wt al. [16] investigated the wear properties of tribological contacts made of textured stainless steel against polymer surfaces.
Carbon filled PTFE benefits in excellent frictional properties, mechanical and wear properties and hence, widely preferred for seals and rings in dynamic and high pressure applications.
Rao, Effect of fillers on mechanical properties of PTFE based composites, Archives of Applied Science Research 7 (7) (2015) 48-58

Ismail1, a , Lidiyawati Suhairi1,b 1Faculty of Mechanical & Manufacturing Engineering, 86400 Parit Raja, Batu Pahat, Johor, Malaysia aazzura@uthm.edu.my, bleedieya@yahoo.com Keywords: 316L, pitting corrosion, salinity, breakdown potential Abstract.
Furthermore, increasing the temperature from 20oC to 50oC also lead to increased the hardness different value which indicate that reducing in hardness properties of 316L at increasing salinity because of corrosion attack.
Several factors that can cause pitting such as chloride, temperature, pH and oxygen [2] and this paper will reveal the corrosion attack on stainless steel 316L in seawater at increasing temperature and salinity in terms of breakdown potential and microstructure.
Fird et al elucidated that at certain temperature the passivation reaction is totally independent of Cl-concentration while the breakdown of passivity is directly affected by Cl- for AISI 304 and 316L [8].

Another rheology properties investigation made was the yield point effect towards the addition of apple skin into the mud.
This is because the yield point is influenced by the concentration of solid in mud and the electrical charge factor.
Type and amount of solids in the mud alters the mechanical iteration and therefore influence the yield point of the mud [8].
Mud cake thickness is also one of the properties determined during filter press test.
Conclusion Generally, it can be concluded that the addition of apple skin into the mud alter the rheology properties of the native mud as well as increase the performance of native mud during filter press test.

The properties of the obtained membranes were investigated in terms of ion exchange capacity (IEC), swelling ratio, area resistance and vanadium permeability.
The conductivity is a key factor of anion exchange membranes.
The fluorinated backbone of polymer is expected to provide excellent stability and good mechanical property for the membrane.
Table1.Physiochemical properties of GFPEO membranes with different DF.
Day, Novel highly fluorinated poly(arylene ether-1,3,4-oxadiazole)s, their preparation, and sensory properties to fluoride anion,Macromolecules, 39(2006),pp.6054-6062

However, the comprehensive description of objects is very hard due to objects' variety of specific properties, the high dimensional data made it impossible to fully display the object.
They discussed the manifold learning theory in the view of cognitive psychology, emphasized the cognitive process as a whole program, believed that the multi-dimension data were affected by a few hidden variables, by which pattern recognition could simplify calculation and improve the recognition accuracy.
The industrial data can be used to do some related applications based on manifold learning method, because of in such data fewer influencing factors acting on it.
The mechanical sampling sample mapping into the lower dimensional space by manifold learning, and in a visual presentation of results, helps to understand the specific characteristics of the object.
While the existence of noise and its influence on the result of data visualization is a significant factor which we should take into account.

Polymeric layers in general respond in a viscoelastic manner under loads and their time-dependent behavior is affected by temperature and moisture.
Weitsman [3] analyzed the mechanical behavior of an epoxy adhesive layer as the adhesive absorbs moisture from the ambient environment.
The calculation of the zeros of Eq. (10) can be carried out numerically for given values of material properties.
The stress singularity factor is normalized by the quantity h λ−1 , giving it stress unit, as follows: );,( lim 0 1 0 tr h r K ij r ij θσ θ λ = − →       = (17) The magnitude of the stress singularity factor can be represented as KKKK xy yy 2 2 * +== (18) Fig. 4 shows the variation of K* .
It is shown that the magnitude of the stress singularity factor is relaxed with time.