Search results

CO2 corrosion mechanism is complex which can be affected by a number of factors such as pH, temperature, flow rate and CO2 pressure [5-7].
From Fig. 3 it also appears that the cathodic reaction was affected by the change in CO2 pressure, while the anodic reaction was not affected [13].
Qiao. and Chu W. 2008 Mechanical properties of CO2 corrosion product scal and their relationship to corrosion rate, Corrs.

This paper also analyses the factors which will influence the out-of-plate moment of the shearwall and it can provide usefull reference to further research on out-of-plate problems of shearwalls.
According to plate tectonic features and mechanical properties, the hollow-shearwall can be regarded as an orthotropic plate [1].
between d and the deflection WJ and WG (y=0.5b) deflection WJ (y=0.5b) Fig.4-5 Relationship between s and Fig.4-6 Relationship between Nx and the the deflection WJ (y=0.5b) deflection WJ (y=0.5b) Fig.4-7 Relationship between q and Fig.4-7a Relationship between q and the the deflection WJ (y=0.5b) deflection MJx (y=0.5b) Fig.4-7b Relationship between q and Fig.4-8 Relationship between H and the deflection the deflection MJy (y=0.5b) difference caused by different support (x=0.8a) Fig.4-9 Moment Mx distribution curve Fig.4-10 Moment My distribution curve along Axis-y(x=0.8a) along Axis-y(x=0.8a) Fig.4-11 Relative difference S distribution curve along Axis-y Conclusions and recommendations 1.From the above example ,we can see the thickness of hollow-shearwall affects
But when the end bending moments increase, the deflection of shear wall increases obviously (Figure4-7), and out-of-plane bending moment is also affected greatly.
Assuming k=a/b, when b is varied, the internal force and deflection are affected greatly.

Notably, the IMCs (intermetallic compounds) formed during the solder joining duration and its vibration resistance affected the reliability.
To obtain steady properties for comparison, some of the specimens were subjected to stabilization treatment at 120� for different duration followed by air cooling to room temperature.
Reportedly [9, 5-7], the lamellar-deformed structures (LDS) of proeutectic Sn-rich phase also affect the damping capacity.
Both lamellar-deformed structures (LDS) were the main factors in the vibration crack propagation mechanism. 4.
Steidel Jr.: An Introduction to Mechanical Vibration, 3rd ed., Wiley (1989) 169. 9) J.

The excellent mechanical properties including better creep and oxidation resistance are controlled by the grain size and secondary dendritic arm spacing of primary phase, as well as the morphology and distribution of γ′ phase inside the γ matrix [2-4].
From a theoretical interest and technological importance, it is essential to understand the microstructure characteristics and the underlying formation regularities to obtain the desired properties to the material [5-7].
Thus, a subsequent aging treatment is required to optimize the mechanical properties of rapid solidified ingots.
Due to the nucleation and growth factors controlling the whole precipitation process are changed significantly by the foregoing non-equilibrium transformation, the precipitation behavior of rapid-quenched sample is much different to the conventional fabrication routes [18-20].
The precipitation behavior of γ′ phase in the dendritic core is also affected by the cooling rate, as verified by the FE-SEM pictures shown in Fig. 2.

Venkatesh3, e 1Faculty of Mechanical Engineering, Universiti Malaysia Pahang, 26600, Pekan, Pahang, Malaysia. 2Faculty of Manufacturing Engineering, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, 76100, Durian Tunggal, Melaka, Malaysia. 3aculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 UTM Skudai , Johor Malaysia.
Introduction Titanium and its alloys are considered difficult-to-machine materials due to several factors such as very high temperature imposed on the cutting edge during machining, being high strength at elevated temperature and strong adhesion to many cutting tools.
Some of the methods were using special oil on the cutting tool, modifying titanium properties, and introducing new tool materials.
The primary issue with cryogenic cooling is change of material properties with abruptly-reduced temperature, which adversely affects tool wear and surface finish.
Properties of various materials including titanium alloy at liquid nitrogen temperature were reported.

Hence, the mechanical properties of rock mass, especially after the failure, still need to be further researched.
The failure and falling of underground rock mass are extremely complicated affected by anisotropy, existence of a large number of joints and various kinds of weak planes, and groundwater, ground stress and mining stress in the rockmass.
There are a lot of factors influencing strength of rock mass, such as the strength of the rock, mining operation, weakness plane, groundwater, certain error of calculating parameter of the rock mass, so that calculation methods of the stability of the rock mass often cause a large error, especially for numerical method used in mining engineering, which can be regarded as reference of project design and construction, but the really reliable method is based on the classification of the rock mass and other comprehensive evaluation indexes Roof falling Block theory is a kind of very good idea, but it is only useful an ideal condition.
The position of slag Mining range mined-out area Overall investigations on joint distribution in roof rock mass, allowable exposing area, formation of rock fall and related mechanical characteristics are carried out based on above mentioned theories.
The factors influencing stability of the rock mass are very complicated.

Thermoplastic composites also exhibit very low level of moisture uptake which means their mechanical properties are less degraded under hot/wet conditions, not to mention their higher damage tolerance characteristics and greater reparability potential as compared to thermosetting matrix laminates [5, 13, 14, 16].
The full factorial design 23 was used (considering three factors: welding time, electrical current and pressure) in order to determine the most suitable parameters to be used during the electrical resistance welding process.
The mechanical properties of welded PPS/carbon fiber specimens were evaluated by using a non-destructive impulse excitation method.
An alternative procedure for measure the elastic properties are to use a dynamic test, offering the advantage of being a non-destructive testing (NDT).
Excluding the contribution from any cracks and other defects, the internal damping of a composite is determined by the following variables: properties and relative proportions of the matrix and the reinforcement; dimensions of the inclusions; orientation of the reinforcement with respect to the loading axis; surface treatments of the reinforcement and voids.

Introduction Electrospinning is a simple and versatile technique to produce continuous nanofibers with many outstanding characteristics, such as high porosity, high ratio of surface area to mass and superior mechanical properties [1].
Owing to these unique properties, electrospun nanofibers have various applications in diverse areas, such as filtration, tissue scaffolds, drug delivery devices, protective clothing, sensors and energy storage [2].
It is well known that the electrospinning process influenced by a number of variables, such as the solution properties, operational conditions and environmental parameters [9-11].
The relative humidity was the only factor varied during our experiment.
It can be seen that the relative humidity significantly affected the gelatin fiber structure in our experiment.

The more detail description on thermo-mechanical coupled theory at finite strains can be found in P.Rosakis [12], M.canadija [13].
Up to now in the continuum sense, the thermo-mechanical coupled model considering crystal plastic slip deformation are rarely occurred.
Thermo-mechanical coupled equations.
Elastic-plastic tangent modulus Constitutive relation.Generally think that the elastic properties of the crystal is not affected by the slip deformation [24], taking into account the impact of thermal stress, the elastic constitutive relation in the intermediate configuration is written as: (4) Where, is Jaumann rate of the Cauchy stress tensor which is the co-rotational stress rate in terms of the coordinate system that rotates with the lattice.
In this system, the initial slip hardening modulus, the critical shear stress, the stress in the first stage, coefficient of rate-sensitive hardening factor is taken as .

In addition,for some of the input factors it is difficult to make quantifiable predicitions of the actual frequency of occurence.
The systematic calculation of bolted joints according to VDI 2230 calls for many input factors.
Uncertainties in these input factors will result in uncertain output results.
For example, the static friction in the screwthread µG is dependent on the thread-locking fluid used, while this factor obviously does not affect µK and µTr.
To incorporate the statistical knowledge we have about µTr, µG, µK and MA, we use Monte Carlo simulations, calculating a sufficiently large number (N) of individual joints with randomly picked properties, producing a set of N tolerable loads Ftol, which form a set of values Fn.