Search results

The new way of using mechanical joint element (MJE) to cross the interface of new and old concrete to reinforce the combination is put forward.
When the new and old concrete strength grade is at certain range [6] , the length of the anchorage and the material of planting MJE are major factors to split strength of old and new concrete specimen.
Effects of surface agent on the shear strength: Table 2 indicates that: shear strength of the specimen with MJE was affected little by surface agent.
Summary 1) The reinforcing effect of MJE on split strength is remarkable; MJE plays an important role after debonding of the new and old concrete; the anchorage length of MJE is the main factor affecting the split strength of new and old concrete specimen. 2) The MJE can increase the shear strength of new and old concrete specimen greatly.
Wittmann, 107 to 114 of Adherence of young on old concrete, AEDIFICATIO Verlag, Unterengstringen, (1994) [5]PRC: Standard for test method of mechanical properties on ordinary concrete,GB/T 50081-2002

Because the metallic hafnium has good combination properties, that makes it the preferred material for control rods of nuclear reactors.
Compared with external factors, the shape and geometry size decide the impact resistance crack value to a great extent.
The mechanical property of stainless steel is little affected by neutron irradiation, therefore, the impact resistance of the control rod assembly enhances obviously.
From the above data, the mechanical property of hafnium plates excels the ASTM standard requirements.
Fabrication and Metallurgical Properties of Hafnium Alloys for Control Rods[R].

These utilizations could incorporate beneficial properties of the materials.
Fusion welding is difficult to join dissimilar materials due to the different properties which could be sensitive to the metallurgical change [1].
Influence of forging pressure on the mechanical properties of rotary friction welded AISI 1045 – AISI 316L has been explored [4].
Table 2 presents factors and levels determination for the experiment.
Factors and levels determination.

Experiments were conducted to research the influence law on dispersing stability of nano-TiO2 powder in water by factors of dispersant type, dispersant content and dispersing process of ultrasonic dispersing and high-speed stirring.
Feng analyzed the influencing factors and formation mechanism of nano-particle aggregation [8].
Gong explored the stability influence factors of nano-TiO2 particles in water [11].
Experiments were conducted to research the influence law on dispersing stability of nano-TiO2 powder in water by factors of dispersant type, dispersant content and dispersing process of ultrasonic dispersing and high-speed stirring.
Mechanical method is a mechanical activation on the surface of particles and changes the crystal structure of physicochemical properties on the surface of particles.

So the mechanical properties of metal surface can be greatly improved.
The fatigue property will affect the life span of the bogie and the travelling crane safty of the vehicles [1~2].
The effect of hand-grinding and mechanical grinding on reducing the stress concentration and improving the fatigue properties was researcged in literature[9].
The diffusion model of the nanocrystalline material was studied and discussed the mutual influence among crystal fault slip grid, grain boundary sliding, grain boundary diffusion creep, rotating sliding and other factors[17].
There are many factors that affect the fatigue properties of the welding joints, mainly including the residual stress of the welding joints, the stress concentration and the organization of the joints and welding defects etc.

Rowlands et al. [8] investigated effects of friction, geometry, clearance and material properties on load distribution.
Test specimens were fabricated and mechanical characterization was conducted to obtain elastic properties of unidirectional MWK fabric composites.
The experimentally obtained elastic properties of the unidirectional composites and steel pin are shown in Table 1.
Although linear-elastic material properties were used in the analysis, the problem was non-linear because the contact areas and frictional forces varied with the load.
The stress distributions and stress concentration factors are shown in Fig. 8.

In all of environmental factors the temperature is one major factor, the high precision measurement should be conducted under homothermal condition; the temperature and the humidity should be remained in allowable bands depended on the measurement accuracy; the measurement should not be conducted until both the measured quantity and the measuring implement reach the standard temperatures. 2 Error Analysis 0f 0n-line Measurement System The image on-line measurement system mainly is composed of lighting system, measured parts, optical imaging system, image pick-up devices and computing group, Analysis of Inner and outside Environmental and Equipment Materials, the factors affecting the system accuracy mainly include lighting system, optical imaging system, CCD pick-up devices, image collecting card and software algorithm.
In this section, we mainly analyze these factors and the corresponding errors.
Under the normal working condition, the numerically-controlled machine precision is the first factor affecting the processing workpiece precision.
CHINA MECHANICAL ENGINEERING, 2000.11(3)P31-318
On-line Impact of the Factors that Increase the Efficiency of Detection and Analysis of the Response.

The Effect of Annealing on Mechanical Properties, the Number of Fluidity, and the Size of Coherent Scattering Regions in AMg1, AMg5, and AMg6 Alloys N.
Their ability to sheet stamping is assessed both by mechanical and technological properties [1-5].
Examples of such indicators may be the Martens index or the stamping ratio, which are a combination of standard mechanical properties: tensile strength, yield strength, elongation.
To assess the mechanical properties, standard uniaxial tensile tests were carried out with determination of the tensile strength, yield strength, elongation.
Results and Discussion The change in the mechanical properties of the samples after annealing is shown in Fig.1.

Osseointegration is reported to be affected by many factors, including the implant design, surface treatment, bone quality, surgical technique, postoperative care, and so on [7-9].
Among these, the thread design of an implant is one of the dominant factors [10, 11].
In addition, the contact interaction properties are also required to be defined for the contact pair.
Properties of materials significantly affect success and failure of implants and its effects on the tissues surrounding the implants.
Mechanical properties of different parts used in the dental prosthesis.

However, stress relaxation and creep are the unique properties of resin matrix composites, which can affect the residual stress and deformation in some degrees.
Introduction Fiber reinforced resin matrix composites, which drive the revolution in the field of material application, have been widely used in aerospace, automobile, medicine and many other industries due to their superior mechanical properties [1-3].
An appropriate constitutive equation for composites is necessary to model the variation of their mechanical properties, which is related to the accuracy and validity of the simulation.
Rp is partition factor, Wm and tm are the weighting factor and relaxation time of the mth branched chain, respectively.
The main reason is that the viscoelastic property of composites is weakened gradually with the increase of fiber volume fraction.