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The experiment was designed based on a three factors five levels full central composite design (CCD).
It is found that all the investigated laser parameters are affecting the performance of the residual stress significantly.
Table 1 presents the process factors, their limits and coded values.
Therefore, a general optimization model should be run to determine the welding settings which satisfy all the requirements for all mechanical properties of interest [11].
Benyounis, Prediction and Optimization of Residual Stresses, Weld-Bead Profile and Mechanical Properties of Laser Welded Components, (PhD thesis, Dublin City University 2007)

The mechanical and soldering properties are also similar to that of it.
The formation of solid solution can fine the microstructure of Bi and enhance the mechanical properties of the solder.
Mechanical and Soldering Properties The stress load of welding point in practical application mainly comes from shearing force, so the shear strength is one of the important mechanical factors of solders.
Meanwhile, Bi dispersedly distributes on the base frame of solders and reinforces the mechanical properties of solders, therefore the shear strength increases.
Therefore, the solder can be handled in wave soldering and reflow process without quite apparent change both in microstructure and mechanical or soldering properties

Due to the uncertainty of geological structure, the specificity of the underground environment as well as other factors, the quality and performance of supporting structure are often difficult to satisfy the design requirements, which not only seriously affects the normal construction and operation of mines but also has the potential threat to the safety of underground production.
But in the actual investigation of roadway supports, due to the uncertainty of geological structures, the specificity of the underground environment as well as other factors, the quality and performance of supporting structure are often difficult to detect accurately, and there often exist some potential defects that do not satisfy the design requirements, which not only seriously affects the normal construction and production of mines but also has the potential threat to the safety of underground production [1].
Finally, compression test was performed on cured core samples in accordance with Standard for Test Method of Mechanical Properties on Ordinary Concrete [6].
Conductivity affects the penetrating depth of electromagnetic impulse.
Objects or areas with different electrical properties will reflect the impulse differently, and appear as anomalies [11].

The results showed that all the composites had poor mechanical properties, less than 160 MPa in flexural strength and 5 MPa•m1/2 in fracture toughness.
The main factor affecting the properties of the composites was investigated.
Results and Discussion Mechanical properties of the three composites were evaluated and listed in Table 1.
All of the composites had poor mechanical properties.
Bad in-situ strength of the fiber was the main reason causing to the poor mechanical properties of these composites.

Generalized Self Consistent Scheme (GSCS) [11, 12] for a two phase heterogeneous material is used to compute the global properties (e.g., the coefficient of effective thermal expansion) of the homogeneous equivalent material (H) as a function of the local properties and volume fractions of the phases.
The macroscopic strength is dependent to the local strength by the concentration factor C (4) It depends as well as C on the local elastic properties of the phases and the temperature change.
The thermoelastic properties are computed with the GCSC and agree with experimental data (Table 1) [10].
Figs. 1 and 2 shows the change of RH and R’H with the composition of the phase by normalizing these factors by those obtained from the reference material containing 40% in volume of void.
a) Stress field b) Change of the left and right stress intensity factors Figure 4.

In this paper, the forming processes, main effect factors and change law of the cutting direction burr in orthogonal cutting have been studied and related theories are analyzed based on the cutting experiments.
Main Influence Factors on Cutting direction Burrs In various machining operation, the cutting burrs are often formed on the side, corner and ends of a workpiece.
They seriously affect accuracy of the workpiece, especially deburring jobs become usually one of factors， which reduces productivity of machining system, and increases cutting cost of a workpiece in precision and automatic machining operations.
This is because of the difference of mechanical property of the workpiece material.
The Formation and Properties of Machining Burrs.

There are many possible factors of failure, such as loosening, infection, instability, fatigue, wear, poor or unsuitable design, low materials properties, improper surgical intervention.
Materials Properties All materials were considered isotropic and linearly elastic.
The mechanical properties of Ti and UHMWPE were selected from the software database, for TiNi from [9], and for Ti6Al4V from [10].
The corresponding mechanical properties used for simulation are shown in Table 1.
Mechanical properties of the total elbow implant components.

University of Minho, Campus de Azurém, 4804-533, Guimarães, Portugal apeixinho@dem.uminho.pt Keywords: Open-cell foams; Mechanical properties; Finite element analysis.
The latter requires knowledge of the relationship between their morphology and their overall properties [1-3].
Although the relative density is the most dominant factor in determining the behavior and strength of a metal foam, other parameters such as cell topology and material properties can also have great influence on its mechanical behavior [1, 3, 7-9].
Table 2 summarizes the properties of this material with a bilinear isotropic hardening.
Ashby, Cellular Solids: Structure and Properties, second ed., Cambridge University Press, Cambridge, 1997 [3].

Factors and levels Factors Levels 1 2 3 Injection Time [s] 0.5 1.0 1.5 Packing Time [s] 4.0 5.0 6.0 Melt Temperature [˚C] 240 255 270 Mould Temperature [˚C] 21 31 41 Four factors and three levels were used in this experiment.
Four controllable factors were selected for this experiment.
That means that, the most significant factors that affect warpage are injection time and packing time followed by mould temperature and melt temperature.
Koshirai, Rheological properties for polypropylene modified by polytetrafluoroethylene, J.
Sulaiman, Identifying the critical moulding machine parameters affecting injection moulding process by basic statistical process control tools, Int.

This alloy is oftentimes thermo-mechanically treated to produce a desired amount of equiaxed α (hcp crystal structure) and intergranular β (bcc crystal structure) with a fine grain size for optimum mechanical properties [5].
Most commercial β-titanium alloys, on the other hand, are metastable with respects to the β phase, and hence provide the possibility to vary the microstructure for an optimization of the mechanical properties.
However, a number of studies [7-11] have revealed that it can be difficult to achieve satisfactory properties when welding high strength titanium alloys.
Nevertheless, since hydrogen evolution and trapping can be affected by several factors, i.e., the unique microstructure morphology, residual stresses and phase transitions induced by the welding process, the reasons for such "strong" and irreversible trapping associated with welding should be investigated further.
Nevertheless, since hydrogen evolution and trapping can be affected by several factors, the reasons for such "strong" and irreversible trapping associated with welding should be investigated further.