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However, the properties of the adhesive can also be classified as a failure criterion.
Several authors have found that the environmental factors can affect the properties of an adhesive joint and ultimate mechanical performance of the adhesive joint [4-6].
Thus, these factors must be considered as critical factors in determining long term durability of adhesive joint.
This is due to the change in adhesive properties.
This is because at high temperature, the failure is determined by the change of mechanical properties of adhesive.

The mechanical properties are shown in Table 1.
However, the fatigue limit for two-step stress was not so much affected by the notch radius.
Fig.11 Effect of notch radius on fatigue limit Fig.10 Effect of notch depth on fatigue limit diagram Table 2 Mechanical properties of SCM435 used in fretting fatigue If this crack is subject to the second step stress (σa2) with high mean stress, this non-propagating crack acts as a pre-crack for σa2 and causes the crack growth, which leads to fracture.
The mechanical properties are shown in Table 2.
[3] Y.Kondo, Cause and effect of factors affecting the ∆Kth of small crack.

Tests were also performed on the pressure-resistant properties of the stalks bales.
Cotton stalks are often 30-90 cm long depending on factors such as their growth conditions and the control of top-cutting.
Fig.6 Cotton stalks bales vertical pressure load-displacement curve Conclusions (1)When density control was used to make cotton stalks bales, the fabricated bales had constant density, and the mechanical properties of multiple bales were fairly close.
When cotton stalks were placed orderly, stalks bales had fairly stable properties
[5] Jin Qiang,Fen Yong, Gypsum-based cotton the straw fiber composite material study of mechanical properties and water resistance performance, 6(2013) ,30-33.

Introduction DLC coatings have drawn much attention in recent years because of their excellent mechanical properties, including great hardness, high wear resistance, low coefficient of friction [1].In addition , DLC is chemically inert, materials such as 304 stainless steel coated with DLC are likely to show huge potential in biomedical filed [2,3,4,5].
The surface morphology and roughness are important factors affecting the adhesion strength of coatings-substrate ,since not only suitable surface morphology can increase the mechanical interlock between the coatings and the substrate but also suitable roughness can promote the nucleation which reduced internal stress during initial stage of deposition [18,19].
Combining with the result in the previous section: the longer etching time, the greater surface roughness, the result indicate that the roughness is not the only factor affecting the binding strength but the surface morphology may be particularly important.Fig. 5 is photograph of Rockwell indentation of DLC coatings on substrate (a)without etched(b)chemically etched(c)electrolytically etched.The chemically etched substrates and the electrolytically etched one here are the same roughness.According to Fig. 5,coatings spallation on etched substrate both decrease in the edge area of indention compared with coatings on substrate without etching.Coatings spallation reduce more on electrolytically etched substrate than that on chemically etched substrate.In addition, in the central area of indention ,the coatings spallation on electrolytically etched substrate reduce much more than that without etching.
Fig. 5 Rockwell indentation of DLC on (a)no etched(b)chemically etched(c)electrolytically etched substrates a mechanical interlock by hole b mechanical interlock by cave Fig. 6 Micro model of coating-substrate combined As shown in Fig. 2, the surface of dense honeycomb hole structure is beneficial for coating atoms to form strong pinning effect.
Qi: Materials for Mechanical Engineering, Vol. 69 (1988), p.31.

Introduction It is known that the production of cold-resistant welds of high strength steels is very difficult because of a number of specific factors.
Therefore, in general, in X-ray exposure of the material comprising a mixture of multiple phases an X-ray pattern is obtained, which has lines of all the phases included in the sample [6] The intensity of the lines of various phases on the X-ray pattern depends on many factors including the amount of a particular phase.
Mirkin, X-ray inspection of engineering materials, Mechanical Engineering, Moscow, 1979 [7] Y.N.
Tyutev, Fatigue failure and properties of welded joints of pipelines in Siberia and the Far North, Mounting and special works in construction. 8 (2005) 18-22
Gladkov, Automation and automation of welding processes, Mechanical Engineering, Moscow, 1982

No studies have yet compared the mechanical properties among these commercial products.
Besides dimensions; composition and manufacture process are factors which could influence the initial force.
The reason may be attributed to the thermo-activated additives which could affect the structure of the elastomeric ligature and its mechanical properties.
Lam et al. [6] found that pigment added to elastomeric ligature affected its tensile strength properties.
[8] Sriamporn T, T.N., Na ranong N, Swasdison S, Physical and mechanical properties of commercial orthodontic elastomeric ligatures.

The surface quality of machined work piece and its properties are important in estimation of the work piece life under dynamic forces.
Although many factors affect surface roughness of work piece, but cutting speed, feed rate and depth of cut have significant effect.
Definition of factors and interactions among them. 2.
Part 2: Mechanical properties and cutting performances, Surface & Coatings Technology Vol. 201 (2006), p. 1045 [8] J.
Part 2: Mechanical properties and cutting performances, Surface & Coatings Technology Vol. 201 (2006), p. 1045 [10] E.O.

Because the loading system was complicated in structure and some other factors, the control performance was not ideal.
The system not only has strong nonlinear and time-varying property, but also has problems such as pressure interference with speed and torque.
It is inevitable to ignore some factors when establish the system model, so the model is uncertainty.
The robust compensator is composed of return-to-zero factor and low pass filter.
The figures show that the speed was overshot and lagged by changes of and and the affect was eliminated by using the robust compensation, but the torque was immune.

Property of the plastic packing ring was decided compared with the experiment result changing property, since it has always been changed with the processing method in which a packing ring carries out property.
Properties of the rupture disk appear in Table 1.
The level of each factor at levels 3 and 4 were used for DOE.
Fig. 4 Stress distribution and changing strain Mean of press 0.5 0.3 0.1 18 16 14 12 10 9.0 8.5 8.0 9.50 7.25 5.00 18 16 14 12 10 Fillet Ring Path Main Effects Plot (data means) for press Mean of pressure 0.50 0.40 0.25 0.10 30.0 27.5 25.0 22.5 20.0 17.5 15.0 9.5 8.0 6.5 5.0 Fillet Path Main Effects Plot (data means) for pressure Fig. 5 Main effect and interaction plot in 3 factors and 2 factors Figure 5 demonstrates the main effect of the design variables.
[2] Fratini, L., Ambrogio, G., Lorenzo, R.Di, Filice, L., Micari, F.: Influence of mechanical properties of the sheet material on formability in single point incremental forming, Annals of the CIRP, 53/1:207-210 (2004)

Unique properties of these new hard composites make enable to realize new applications not mastered so far.
This article reports on structure, microstructure, surface morphology, mechanical properties and high-T oxidation resistance of the a-Si3N4/MeNx composites with a high (≥50 vol.%) content of aSi3N4 phase.
This is a reason, why the nanocomposite films lose their unique properties at T>Tcr.
The effect of these three factors on the film crystallization is further illustrated on the crystallization of Zr-Si-N films during their thermal annealing performed under different conditions.
Musil: Physical and mechanical properties of hard nanocomposite films prepared by reactive magnetron sputtering, Chapter 10 in the book "Nanostructured Hard Coatings", A.