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Table 1 Factors and Its Values of Preparing Cf /Al Composites by Liquid-solid Infiltration Extrusion Factors Melting Temperature [℃] Extrusion Temperature [℃] Extrusion Pressure [MPa] 680 650 30 690 660 40 700 670 50 2.3.
The mechanical properties of composites are improved compared with that of the matrix alloy.
At the same time, it will cause the large grain of the alloy and seriously affect the mechanical properties of the composites.
"Mechanical Properties Analysis and Application of Metal Matrix Composites."
"Effect of Nd content on microstructure and mechanical properties of Gr f /Al composite."

Abstract: In order to make the design criteria of metallic sealing rings, and improve the mechanical properties of metallic sealing rings used in aviation engine, using finite element analyzing the stress distribution of three corrugated sealing rings with different corrugated radius.
Because of its "seal ring thin-walled, large deformation, precision" on the whole, the development of metallic sealing rings are extremely difficult, and the design analysis process is affected by many factors, design analysis affected by many factors.
Through the calculation of the finite element with the stress condition to optimize the structural parameters of sealing ring, to obtain better mechanical properties, and also to get the design rules of the sealing ring. 1 The geometric model of metallic sealing ring Metallic sealing ring is composed of high temperature alloy steel.
Under high temperature, the strength of the material is still very good, its oxidation resistance, fatigue, fracture toughness, plastic and other comprehensive performance are very good also, the basic mechanical properties parameters are shown in Table 1. [3,4,5] The thickness of this kind of seal ring in general 0.1mm --0.5mm, here we selected thickness of t=0.2mm.
(2) In the condition of 650 ℃, after compared the stress distributions of metallic sealing rings with different corrugated radius, we can find that the use of larger radius waviness can effectively reduce the stress of metallic sealing ring, and improve the mechanical properties of metallic sealing ring

The complex stress intensity factor and the T-stress characterizing the stress state at the crack tip are calculated both for the thermal (residual stresses) and mechanical loading using the two-state integral.
However, if higher order terms of the asymptotic expansion are needed because the fracture process is not confined well within the boundary of the K-dominant field, then under the combined influence of mechanical loading and thermal stresses the criterion evolves from a local formulation (i.e. depending only on local properties around the primary crack tip) to non-local one in which the geometry of the whole body plays a role.
Scheme of the analysed four-point bending specimen, detail of the deformed FE mesh and considered orthotropic material properties of both layers.
Elastic properties of the layers M1 and M2 possess the tetragonal symmetry with elastic modulus Ex=Ez=E in the direction of x and z axis and elastic moduli Ey=E’.
The energy release rate G: (a) for the case of pure mechanical loading (b) for the case of the combined (thermal and mechanical) loading.

The feasibility of the process and the most important process factor which affects the depth of the micro-dimple were investigated by orthogonal experiments.
Electrolyte concentration was the most important factor that affected the depth of the micro-dimple in the selected process parameters.
Comparatively, micro-dimple surface textures have been paid more attention because of their good machinability and excellent tribological properties[4].
In this study, we proposed a modifed TMEMM process with flexible porous material filled in the interelectrode gap and then investigated its feasibility and process affecting factors.
The designed factors and levels based on the orthogonal experiment method were shown in Table 2.

The results showed that both feed rate and depth of cut have a little effect on the value of three-dimensional roughness parameter, and the cutting speed is the main affecting factor.
Introduction Mechanical and physical properties of particle reinforced metal matrix composites such as high specific strength, stiffness and wear resistance indicate that these materials play an important role in application for aerospace and automotive engineering components.
The factors and levels of cutting parameters were shown in Table 2.
It can be found from Fig. 2 that the cutting speed is the dominant factor affecting the surface roughness in terms of value of range.
Table 2 Factors and levels of cutting parameters Factors Levels 1 2 3 A: fz（mm/z） 0.01 0.05 0.1 B: Vc（m/min） 150 300 450 C :ap（mm） 0.01 0.05 0.1 Fig. 2 Main effects plot of cutting parameters Summary In this study, three-dimensional roughness Sq was investigated and its calculated method was proposed.

Moreover, mechanical properties were also analyzed and found to be comparable between diverse sources, so the authors claim that these results support the potential use of recycled plastic by prosumers.
Nevertheless, since this type of plastic has already been processed, it has also undergone thermomechanical and thermo-oxidative degradation, affecting its mechanical and rheological properties [6].
The feasibility of this procedure for FPF manufacturing is evaluated considering the influence of two factors: rPET blend percentage and particle size.
This difference could be an effect of the layer-upon-layer and parallel-pattern deposition strategy, that could be affecting the mechanical behavior of the material when compared to continuous one-piece specimens.
Thermal, Rheological and Mechanical Properties of PETG/rPETG Blends.

The mechanical properties of the cryogels have been investigated by dynamic mechanical measurements.
In conclusion, the biomaterial obtained provides good swelling properties, mechanical resistance and it is ideal for extended drug release implantable systems.
The mechanical properties of the pva biomaterial may be influenced by several factors.
These factors include: weight percentage of the respective components of the cryogel (water and pva); the number of freeze/thaw cycles; and the duration of the freeze cycle.
Conclusions In this study we developed a type of criogel based on polyvinyl alcohol and ketoprofen with good mechanical properties and hydration.

A high alkali environment of concrete with pH higher than 12.0 acts mainly on glass fibres which degrade and their mechanical properties are reduced consequently.
Long-term Tensile Properties of FRP Reinforcement The factors which influence long-term properties of reinforcement can be divided in to physical (creep of reinforcement, fatigue due to high-cyclic loading) and environmental/chemical (especially humidity, alkalinity, etc.).
The rate how much they influence the decrease of reinforcement mechanical properties is depended on exposure time at given environment, level of acting load and temperature above all (e.g. [4] to [8]).
FRP reinforcement which is properly designed has to ensure the sufficient durability by its composition (by fibres and matrix) and to minimize the impact of particular aggressive factors.
This process can be the key factor for assessment of mechanical damage and subsequent prediction of the residual strength and service life of FRP material.

The paper contains results of an experimental evaluation of fatigue properties of two steel types used for shaft manufacture, namely rather conventional, medium carbon high quality C45+C steel and quite modern low alloy ETGâ88 steel, recently developed with the aim to reduce overall manufacture cycle costs together with maintenance of high mechanical and fatigue properties.
Besides fatigue tests, experimental programme contained an evaluation of (i) chemical composition, microstructure and material purity, (ii) mechanical properties and (iii) resistance to brittle fracture – notch impact toughness.
This fact probably affected fatigue properties, fatigue crack initiation mode and also notch impact toughness.
§ Mechanical properties of ETGâ88 steel are higher in comparison with those of C45+C steel
§ Fatigue strength of ETGâ88 steel is very good, approximately by 20% higher than that of C45+C steel, the difference being even more significant than the difference between static mechanical properties.

Finite element method was used to calculate stress intensity factors by ABAQUS software.
Stress intensity factors from residual stress with and without bonded retarders were calculated and compared.
Effects of bonded retarder on stress intensity factors were calculated.
Fig. 3 Residual stress intensity factors at each crack length Fig.4 illustrates the stress intensity factors curve with crack length when the load is applied.
So it’s important to control the welding position and welding process for enhancing damage tolerance properties.