Search results

This study indicates that the spacing of anchor bolt affects the deformation most, followed by the length of anchor bolt and pre-stress.
The most remarkable characteristic of red clay is poor physical property index but good mechanical property.
In 1937, Terzaghi raised the mechanical property of soil, namely strain softening, which shows the peak strength of fissured clay drops with the increase of strain.
There are many factors impacting the deformation control of foundation projects, so practical projects shall pursue reasonable stability and deformation design on the economical and reasonable basis.
[9] Zhujiang Shen, Theoretical Soil Mechanics, China Conservancy & Electricity Press, Beijing, 2000 [10] Yiling Liao etc, Variation of engineering properties of red clay in South China, Guizhou Science, 36(2008) 304-319

Fig 2.1 The results comparing of modifying when modifier is in best dosage penetration Fig 2.2 The softening point of modifying when modifier is in best dosage penetration Fig 2.3 The ductility of modifying when modifier is in best dosage penetration WARM MIX ASPHALT ROAD PERFORMANCE RESEARCH In order to minimize the factor that affects analyse the modification effects of modifier, this experiment used the same aggregate gradation.
Hot mix asphalt mix ratio design The experiment uses the aggregate whose physical and mechanical properties are set to meet the technical requirements in JTGE 42-2005 highway construction materials testing procedures [5], the forming gradation is shown in Table 3.1.
Some studies show that it is because colloidal factor of the SBR is less damage at low temperature, and the modified factors play their role[10],but the effect of epoxy curing agent has not been fully realized in curing time.
Conclusions Warm mix asphalt agent can reduce the mixing temperature, at the same time it can’t affect the performance of the asphalt.
Based on temperature and surfactant mix asphalt mixture design and related properties of [D]. ​​

Analysis on welding crack of subcritical power station boiler platen superheater header Yanting Feng1,a, Xiangfeng Zheng1,b, Xuexia Xu1,c, Guozhen Dong1,d, Yong Wang1,e, Peng Sun1,f 1 Boiler Inspecting Department, Hebei electric power research institute, Shijiazhuang, 050021, China a13503206410@139.com, bhepri-zxf@he.sgcc.com.cn, c13739765966@139.com, dhepri-dgz@he.sgcc.com, ecn, ehepri-yongw@he.sgcc.com.cn, fhepri-sunp@he.sgcc.com.cn Keywords: Platen Superheater Header, Failure Analysis, 12Cr1MoV,Welding Crack Abstract.Welding crack analysis was carried out on tee joint crack of boiler platen superheater header (12Cr1MoV) of subcritical power station applying finite element analysis,microanalysis, mechanical properties test, chemical composition analysis, metallography examination and SEM observation etc.
Structure analysis showed that there existed a series of improper factors in the tee joint design.
Conclusions and Suggestions According to above discussions, the Causes of the crack are the integration results of several factors led to crack origination at the step of tee joint where is also melting line including improper tee joint strcture, non-special welding process applied when welded and heat treatmented, large welding standard and residue post-weld stress not decreased effectively by heat treatment.
Split-rod should be carried out for those with defects to remove the metal of weld seam and heat-affected zone.

Therefore, it was very important to study the mix ratio, basic property and durability of the autoclaved aerated concrete for satisfying the production demand and improving its performance.
Table.4 Testing results of Performance for Autoclaved Aerated Concrete Block Testing Item Standard Testing Result Dry Density ≤ 625 kg/m3 617 kg/m3 Compressive Strength Average Value ≥ 3.5 MPa 3.8 MPa Minimum Value ≥ 2.8 MPa 3.1MPa Freezing Resistance Strength after Freezing ≥ 2.8 MPa 3.0MPa Mass Loss ≤5.0% 4.2% Radioactivity External Exposure Index ≤1.0 0.54 Internal Exposure Index ≤1.0 0.13 Dry Shrinkage Value ≤0.5 mm/m 0.38 mm/m Thermal Conductivity ≤0.16 W/m.k 0.081 W/m.k Heat Transfer Coefficient —— 1.09 W/m2.k Property Analysis of Autoclaved Aerated Concrete Block Pore Structure of Autoclaved Aerated Concrete Block.The autoclaved aerated concrete block is a kind of light block with highly dispersed pore structure and its physical and mechanical properties are affected directly by some factors such as air bubbles, pore distribution, wall thickness of pore, hydrating production kinds, crystal degree and so on.
Fig.3 Relation between Rate of Volumetric Water Absorption and Time for AAC Block Research of Shrinkage Property for AAC Block.
Structure and Properties of Aerated Concrete : A Review[J ] .
[6]N.Narayanan K.Ramamurthy Structure and Properties of Aerated Concrete: Areview[J].

Table 2 show the characteristics of ASTM F75 are assigned to acetabular and stem part of the prosthesis, while the femur bone mechanical properties is shown in Table 3.
Mechanical properties of CoCrMo.
Mechanical properties of femur bone.
The lifetime of the AHP is influenced by 2 factors, namely from the inside of the material such as the Wear Coefficient and from the outside in the form of Contact Pressure and Sliding Distance.
Hastings, Handbook of biomaterial properties, second edition. 2016

The friction condition between blank and the tools is one of the most influencing factors to the whole deep drawing process.
Table 1 Material property of sheet material Material property unit Density 7.8e-6 [kg/mm3].
Due to its good machining ability and high mechanical property it is applied into many metalworking fields such as auto body, electrical product and steel-made furniture etc.
Design of experiment DOE is a popular method that plans and conducts experiments and analyzes the result data to identify the factors which significantly influence the process.
It is clear that the friction condition between the blank and the punch is the most influencing factor which does affect the forming process.

The study confirms wind velocity as main variable that strongly affecting dispersion phenomena.
Among the principal factors that promotes dispersion of the atmosphere pollutant are local meteorological conditions and turbulence phenomena.
The conclusion was that’s possible calculate the quality and quantity environmental factors and that natural gas is better fuel than diesel, presents 0.944 ecological efficiency against 0.914 of diesel, considering a thermal efficiency of 54% in the combined cycle.
The presence of an additional variable does not affect fluid flow by default, although some fluid properties may be defined depending on the additional variable.
Then, the boundaries don’t affect the internal fluid flow.

The basic principle of induction heating, which is an applied form of Faraday’s discovery, is the fact that alternating current (AC) flowing through a coil affects the magnetic movement of a conductor located near the coil and alternating magnetic field leads to generating current on the surface of the conductor.
In accordance with Lenz law, we can know that magnetic field caused by induced current, in return ,will affect the variation of the current flowing through the coil .In fact, the current is not changeable, so the way of loading should be taken into consideration.
Electromagnetic induction is the leading factor and determines the course of heat conduction to some extent. 87% quantity of heat is generated in vortex layer, so it is necessary to analyze the magnetic field.
So it is necessary to do research on the parameters which affect the deflection of the clamping bore.
Clain, Numerical modeling in induction heating for axisymmetric geometries, IEEE Transactions on magnetics,vol,33(1) （1997）:739-745 [7] “Mechanical engineering material data sheetse” ditorial board, Mechanical engineering material data sheets, BEI Jing: Machinery industry press, 1995

Introduction In mechanical engineering filter elements of various designs are used, which can be divided into the following main types: oil, air, fuel, cabin, diesel and hydraulic.
A number of factors affecting the aircraft reliability level must be provided to prevent abnormal and emergency situations during the liquid rocket engine operation, associated with the occurrence of high-temperature bundles, fires due to the foreign particles ingress into the fuel components composition.
The thickness of the sheet determines not only the mechanical strength, but also the filter resistance to vibration loads.
In the manufacture of a filter element designed for fine cleaning of fuel, to obtain a large number of small dimensions channels in one step is an urgent problem in mechanical engineering.
During laser processing, the material is removed as a mixture of molten and vaporized particles, the ratio of which depends on the material properties and the laser radiation intensity.

With continual mechanical stirring, resulting in a well-distributed and transparent cellulose/NMMO solution.
Measurements of cellulose films properties.
The key factor in obtaining high performance films is the cellulose concentration in the casting solution which affects the oxygen permeability and skin-section structure of the films [8].
a b c The Effect of coagulation bath temperature.Different coagulation bath temperatures greatly affected the exchange rate of solvent NMMO and water, and so affected the morphology and properties of the resulting films.
Fig. 5 Effect of temperature of coagulation bath on the oxygen permeation flux of cellulose films Conclusions 1) Cotton pulp was found to be the preferred cellulose source; the optimum pulp concentration in the casting solution was found to be 5%; and the preferred temperature for the coagulation bath was 40ºC. 2) For a given coagulation system, a higher cellulose concentration lead to a final film with a lower oxygen permeability. 3) The type of the cellulose pulp was found to affect the oxygen permeability of the films. 4) With an increasing temperature of the coagulation bath, the pore size became larger, resulting in higher oxygen permeability.