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Mechanical properties of fiber reinforced composites depend on the interfacial shear strength between the reinforced fiber and the matrix resin.
In particular, the interfacial shear strength (IFSS) between the reinforced fiber and the matrix is one of the most fundamental factors in evaluating mechanical properties and durability on the fiber reinforced composites [10].
In the study of interfacial properties for fibrous composites, most materials as the matrix resin are used to the epoxy resin [11-17].
It is hard to find the interfacial properties for rubber-modified epoxy resin system.
The material properties of the neat and the rubber-modified epoxy resins are shown in Table 2.

To attain weight reductions, components are single complex shapes usually made of titanium alloys and designed with thin webbing and ribbing, while having high structural precision and very specific mechanical properties[2].
However, the isothermal local loading forming process of large-scale complex integral component is a complicated forming process with coupling effects of multi-fields and multi-factors, due to the local loading mode and there exists alternation between loading and unloading, also that among loading zone, unloading zone and transitional region.
The coupled thermal-mechanical tetrahedral element with four nodes is selected to discretize the blank uniformly.
Constant shearing friction model is used to describe friction between the blank and die, frictional factor is 0.3.
The offset force is affected mainly by the structure of compoment, the partition of loading zone and partition position.

We will study the effective value of the angle which affect on the bolted joint surface by the experimental research method.
This results provide valid reference for the mechanical structure design which with the bolted joint surface, so as to achieving the purpose of more efficiency during the mechanical structure design.
The determination of the effective envelope angle of bolted joint surface is a necessary step in the stiffness calculation of the surface and mechanical design size, which is also play an important influence factor to the overall property in the mechanical design.
Therefore it is necessary to consider the combination of the surface envelope angle in the mechanical structure design which has joint surface.
Nassar, Antoine Abboud: An Improved Stiffness Model for Bolted Joints, Journal of Mechanical Design, Vol.131. (2009) [4] Zhang Xueliang: Mechanical Joint Dynamic Properties and Applications, China Science and Technology Press. (2002) [5] Li huiguang, Liu Heng,Yu Lie: Contact Stiffness of Rough Mechanical Joint Surface, Journal of Xi An Jiao Tong University, Vol. 45 No.6. (2011)

The technology is quite new and so, investigations have to be performed in order to gain a comprehensive knowledge about effects on numerous material and technological parameters on weld quality and properties.
However, fatigue loading is a very important factor affecting service safety and reliability and that is why a particular emphasis on fatigue resistance together with evaluation of damage mechanisms and affecting factors was put in this work.
Note that investigation of fatigue properties and phenomenon is still missing in some works aimed at laser welding of high pressure pipelines [6].
In that case, the so called K-calibration factor F, which is a function of (a/W), can be neglected [7] and stress intensity factor K can be simply calculated as K = sÖ(pa).
Němeček: Effect of shielding gas on residual stresses and mechanical properties of laser welding of S355 steel, in: Proceedings of EAN 2016 - 54th International Conference on Experimental Stress Analysis (2016).

Due to the influence of rolling force fluctuations, tube size changes and material uniformity and other factors, vibration and other phenomenon inevitably occur in the rolling process of tandem rolling mill.
In the rolling process, the rolling force is fluctuating because of the influence of tube size changes, the material uniformity and the structural rigidity of the rolling mill and other factors.
Finite Element Model for Rolling Definition of Material Properties.
Fig.5 Meshing for the roll The Definition of Material Properties.
The physical properties of the roll are: elastic modulus of 150 GPa, shear modulus of 79 GPa, Poisson's ratio of 0.27, mass density of 7810 kg / m3.

Simulation and actual operation results show that using the optimization algorithm has properties of no overshoot, quick response, good robust and the algorithm is simple.
So the PID controller parameter’s optimization becomes a public issue and it directly affects the control effect, also it has a close relationship between system security and the economy operating.
Crossover rate and mutation rate are two important parameters of genetic algorithm and its value’s selection largely affected the optimization algorithm performance.
The crossover probability and mutation probability of selection on genetic algorithm parameters is key factors that impact on the genetic algorithm behavior and performance, which directly affect the convergence of the algorithm.
The adaptive genetic algorithms maintain population’s diversity, at the same time ensuring the convergence of genetic algorithms. 2.4 The Parameter Optimization of the Adaptive Genetic Algorithms based on PID Control Whether the electric furnace PID controller’s performance is good or bad, its key factors is the selection of parameters，，.

Collagen, as main component of extracellular matrix, displays several attractive properties.
It has good biocompatibility, does not show antigenicity, is completely biodegradable in vivo and its physicochemical properties can be suitably modulated [13].
Furthermore, with its osteoinductive and plasticity properties, collagen can form a suitable matrix in CaSO4 composites.
There were two major factors affecting the absorbability of the CaSO4/COL composites during the test, one was the collagen content and the other was the pre-treatment.
Mechanical properties and in vitro bioactivity of injectable and self-setting calcium sulfate/nano-HA/collagen bone graft substitute.

The new pudding-cup test method has been used to evaluate the delamination stress, where singular stress or stress intensity factors are used to evaluate the delamination strength.
The mechanical properties of the thin layer were tuned by matching the deformation at the layer with these in the leg-shaped structure.
Table 1 shows that we determined the value of the mechanical properties.
And Table 3 shows the value of the mechanical properties.
Table 5 shows the value of the mechanical properties of the interface.

Samples were collected in accordance with a predetermined methodology in order to eliminate the influence of such factors as, for example, time elapsed since the last meal.
Saliva is one of the key factors which influence the homeostasis of the oral cavity.
Additionally, some physico-chemical properties of unstimulated mixed saliva were examined.
In order to increase the accuracy of the study and the quality of the results, the saliva was taken in accordance to instructions developed by the authors - in previous experiments the following factors had been found to affect saliva viscosity values: sampling time, the delay between taking the sample and the analysis, the amount and type of the taken saliva, the condition of the oral cavity.
Brookfield viscosimeter was used to investigate the rheological properties.

In the recent studies it was shown that localized heating during FSW process caused microstructure evolution in the different zones that influenced the mechanical properties in the weld.
The aim of the present investigation is to determine the temperature influence on the microstructure evolution and mechanical properties of the age-hardenable aluminium alloy using the developed technique.
The mechanical properties were as follows: tensile strength = 323 MPa; yield strength = 257 MPa; elongation = 6.3 %.
Microstructure and Properties.
Michailov, Comparative Analysis of Non-Uniformity of Mechanical Properties of Welded Joints of Al–Mg–Si Alloys During Friction Stir Welding and Laser Welding, Metal Science and Heat Treatment 60 (5-6) (2018) 393-398