A linear equations related to the position errors of the contact point on the tooth surface and the mounting errors was derived from calculating total differential of equations of meshing. The sensitivity of gears mounting errors to contact point position errors was studied by means of the singularity...

The probability approach is the most popular way to quantify uncertain parameters and perform reliability analysis. The problems of structural optimization and robust design for laminated composite structures with reliability constraints are addressed in this paper. A new methodology to determine the...

In order to investigate the cause of the typical bush rupture and wear damages in the journal bearing of the steam turbine generator set. The misalignment bearing analysis model of considering lubrication turbulence effects was established. The pressure, thickness distribution of the oil film is obtained....

For research on the strengthening and repairing technology of the concrete flexural members, mechanical properties and deflection deformation of reinforced concrete flexural members are studied by means of several experiments which are pasted the carbon fiber cloth in tension section. This article made...

In order to study the effect of viscous energy dissipation brace to the special Stress Performance of the concrete frame joint, the paper analyzes the concrete frame with installed and not installed damper under the action of earthquake by adopting Sap2000.The internal forces in joint area and seismic...

Based on Hoek-Brown failure criterion, selecting the plastic shear strain as strain-softening parameter and considering elasto-plastic coupling, the approach of solving nonlinear relations between stress and axial strain, hoop strain and volumetric strain in the post-peak region was proposed by modeling....

The Shengli Bridge is a five-span continuous arch bridge constructed by Japanese 108 years ago in Dalian, China. Lacking of maintenance and repair, lots of longitudinal and transversal cracks are found on the bottom surfaces of arch ribs, as a consequence, steel bars are exposed and corroded extensively....

Aiming at the common asphalt pavement structure combination, large general finite element software is used to build the three-dimensional model based on the multi-layer elastic system theory. The pavement structure vertical stress & time curve are analyzed entirely under the moving load. The results...

Finite element model is performed to simulate the interactions between soils and concrete segments. A practical engineering example for double-layer linings of shield tunnel is numerically simulated with FEM in order to compute bending moment allocation ratio between bending moment on the initial lining...

The foundation-structure of the building is an important research direction in the field of the geotechnical engineering . The pile foundation is the key research direction in the field of basic research, the pile foundation with its powerful bearing capacity is widely applied in engineering areas ....

In order to research feasibility of high strength concrete applied to the framed structure of large-scale firepower plant, the 3 high-strength concrete short columns are experimentally researched. The results show that the stirrup ratio increases, the hysteretic curves of columns increasingly become...

In order to research feasibility of high strength concrete applied to the main factory building frame and framed bent structure of large-scale firepower plant, based on the experimental research of 6 reinforced high strength frame slender columns under frequency cyclic loading, the failure shape and...

With finite element software ADINA, numerical models were presented for reinforced concrete-steel plate composite coupling beams, under span-depth ratio of 2.5:1,2.0:1 and 1.5:1, plus steel thickness of 8mm and 12mm, in order to study its seismic performance. Results show that reinforced concrete-steel...

Cutting analysis and form-finding analysis are two key problems in the design of membrane structure. In the traditional analysis, the cutting lines are not considered in the form-finding analysis, but structural damages often emerged from these locations. So the form-finding analysis including the cutting...

Now a large number of expressway enter the stage of repair and maintenance. But it`s easy to overlook the pavement`s performance, especially the skid resistance of the interchange at ramp exit and entrance during the repair and maintenance Interchange ramp exit and entrance has always been the accident-prone...

The development of construction technology today, allowing construction of high-rise building that has 20 floors or more simply the floor 5-7 cycles /day, so the time of completion of construction of the building quickly. The implication aspects of cost control, quality, time should be more strict and...

This paper studies the influence of various parameters, such as alloy types and slenderness ratios, on the hysteretic behavior of compression aluminium members under cyclic axial loading. In this research, a method by finite element analysis was proposed. The method was based on FEA software, ANSYS....

For new section of aluminium alloy members there are still not enough researches on the mechanical properties and mechanism of action. The nonlinear finite element analysis (FEA) was carried out to study the mechanical properties of new section of aluminium alloy members under axial loading. In this...

Using molybdenum tailings in Shangluo as a core sample and the cement as gelled material, the unfired brick is prepared by mixing molybdenum tailings, cement, sand, silica powder and accelerating admixture, and then stirring and vibration. The effects of molybdenum tailings content, the ratio of molybdenum...

Prestressed concrete composite box-girder bridges with corrugated steel webs were introduced in China in the early 21st century. Now the number of this type of bridges under construction and completed has been more than forty, and China has become the second country where this type of bridges is most...

The significance of green materials to the building interior space is not only to bring about the improvement of human living space, but also to protect the environment. It is also a high level of experience which brings people spirit and culture.

In order to discuss the failure mechanism of concrete filled steel tube lattice wind turbine tower joints. Based on the parameters of abdomen strut section form, and using nonlinear static numerical simulation, this article research on the stressed complex joints. The results of the study show that the...

Acoustic emission data of the whole Acoustic emission data of the whole failure process of prestressed reinforced concrete beams by the test of hierarchical loading are collected then introduce a detailed description of using the least squares method to calculate the b-value using Seismology b-value...

For researching the relationship between prestressed reinforced concrete acoustic emissions (AE) signal and its damage evolution information, the paper studies AE signal parameter sequence fractal characteristics for destruction of whole process of prestressed reinforced concrete under different stress...

The use of acoustic emission technology of prestressed concrete beams damage monitoring research, obtained the prestressed concrete beam damage acoustic emission monitoring of real-time data; according to the value of the acoustic emission energy parameters of acoustic emission, reveals that the bearing...

New precast concrete shear walls use mild steel bars protruded from lower precast concrete wall and anchored in grouted metal bellows embedded in upper precast concrete wall to form integrity. The horizontal connection of precast shear walls is frequently located a certain distance higher than the story...

The fundamental characters and failure mechanism of the landslides related to freeze-thaw action are introduced in this paper. Monitoring of the ground temperature and the pore water pressure at the landslide located at the side of the Heifangtai loess platform, Gansu province suggested freezing can...

This paper is concerned with a way to improve the anti-buckling performance of castellated beams. The finite element package ANSYS 15.0 is used to model castellated beams. Numerical simulations are carried out to provide data for the development of the critical load of web local buckling of hexagonal...

Based on large-scale triaxial tests, the mechanical properties of loess and crushed rocks mixture mass of a freeway tunnel’s surrounding rocks in Hebei were studied under the consideration of crushed rock’s contents. The test results indicate that with the increase of crushed rocks contents, initial...

Because of the special engineering properties of red clay with high water content, high plasticity, high porosity and other special engineering properties, especially the water loss shrinkage of the subgrade surface has been cracked, which makes the subgrade produce a number of diseases. Paper took the...

This paper concluded and analyzed the depiction that concerned concrete frost mechanism for many years. The main theories are phase change process of water into ice, the existence of water in the concrete forms and gap on the water hydrostatic pressure and osmotic pressure hypothesis, freeze-thaw critical...

Design level C30 ,Water cement ratio 0.5, Sand rate 36%, Glass powder content 15%, Glass particle size by milling 35min, Waste glass powder mixed with two kinds of color, brown and green. Plus a baseline group of three groups and each group of six, a total of eighteen. Strain gauge affixed to the sides...

The paper is aimed at the phenomenon of red clay subgrade disease,taking the subgrade filling from the Yuqing-Kaili Expressway as the research object,doing the expansion test on the red clay,analysing of red clay expansion deformation law. The results showed that in the same compaction degree, different...

Aluminium alloy structures are widely used in civil engineering. In this paper, nonlinear analyses were carried out on the aluminium alloy members under bending moments by finite element analysis. The parametric study shows that the ductility of the new section is better than that of the I-section. The...

This paper through the experiment discussed the glass powder to substitute the mineral powder to asphalt mixture effects of asphalt mixture aggregate ratio, volume parameters and water stability. Experimental results show that the glass powder to substitute the mineral powder have minimal impact to asphalt...

Slope supported by gabion and geotextile bag both have a high supporting strength, and with local materials, convenient construction, adaptability, environmental protection, low noise, low engineering cost and other advantages. So, it has a rapid development and wide application. To achieve supporting...

The damage test of concrete with size of 100 mm * 100 mm * 300 mm under loading history and sulfate attack has been carried out to investigate concrete properties. Mass and ultrasonic velocity of 15 prismatic concrete which are immersed in 1% sodium-sulfate solution under different loading history are...

A long time immersion test of silica fume concrete specimens in sulfuric acid is carried out.On the basis of experimentaldatum, a novel prediction model for sulfuric acid corrosion of concrete based on support vector machine (SVM) is proposed. The design steps and learning algorithm are also given. Five...

Paraffin regenerative ball physical model is presented in the paper, and the process of regenerative ball phase change heat transfer is simulated by FLUENT software. This paper expounds the temperature and liquid composition distribution in the process of the regenerative ball heat storage and heat release,...

HDP rubber asphalt mixture is made of rubber asphalt with a certain amount of HDP additive. The HDP rubber asphalt by Marshall design method with ratio design, of Marshall specimens tested the related technical indicators, to determine the optimum mix amount of HDP, aggregate synthesis of gradation and...

In order to study the influence of strengthening ring on the seismic performance of the recycled concrete filled steel tubular column and steel beam joints. In this paper, reinforcement ring, reinforcing ring extending length, thickness as the test parameters, a total of 4 recycled concrete filled square...

Interpretation of green design concept by modern architectural design is always confined to high-end technology with no reference to the advantages of traditional building materials and construction technology. In the perspective of low-technology strategy and focusing on the expression of green and...

Using the method of accelerating GRC ageing, the effects of waste concrete and fly ash on flexural Strength and durability of GRC were researched. The results show that the durability of GRC can be improved to some extent when 30% of natural sand in GRC was replaced by waste concrete, but the improvement...

For effectively dealing with the low flexural strength, high brittleness of ordinary mortar, this article proposed a new design method of compound-modified mortar with the inclusion of polyester fiber and styrene-butadiene rubber Latex (SBR latex). The results revealed that the addition of SBR latex...

In order to study the stress and seismic performance of all- lightweight aggregate concrete shear wall under different reinforcement forms,two shear walls were tested under low reversed cyclic loading.The influence of different reinforcement forms on the mechanical properties and seismic performance...

By using different kinds of deposit methods such as thermal spraying, cold spraying and plating method, pure copper coating was prepared on aluminum alloy matrix. The preparation method, appearance of the copper coating, microstructure, and phase structure were then discussed.

According to the technology requirements of strain strengthening, hardware instruments, such as upper computer, PLC , A/D converter, D/A converter, frequency converter, sensors and software components such as configure software, PLC programming software were adopted to design and develop a strain strengthening...

This paper adopts the ultrasonic vibration reaming, whereas reamer dry type implements the separation of the pulse function type vibration cutting and eliminates the ordinary cutting process of elastic vibration extrusion a regular pulse intermittent cutting process was achieved by which the cutting...

The total integrated scattering method for non-contact measurement technology, will not damage the surface of the sample, the instrument has a simple structure, low cost, high speed, high accuracy, less susceptible to environmental factors and other characteristics, has been widely used on the quality...

In order to research the transient-state flow field characteristics of spherical spiral groove aerodynamic bearings, the bearing's 3D micro gas film mathematical model was established, and analyzed the 3D gas film pressure field of the bearing based on the FLUENT software of fluid dynamics, and obtained...

TiN coating was deposited by reactive magnetron sputtering method on 304 stainless steel. The surface morphology, cross-sectional microstructure, elements distribution and wear scar of the TiN coating were investigated by scanning electron microscopy, energy dispersive spectroscopy and optical microscopy....

A life prediction model for HCF-LCF interaction loading which comprehensively considers the ratio of the HCF load to the LCF load and the ratio of stress amplitude in this work. The prediction model based on the Miner model, but correct its error by considers that the loads lower than the fatigue limit...

With its low production cost and environment compatibility, precision compression molding of glass lenses technology has developed rapidly. In this research, a numerical optimization design for a compact and efficient precision glass molding prototype is raised, which combine both thermal and deformation...

The shortcomings of the traditional refractory brick processing equipment with sensor and cylinder are ineffective and the high failure rate. Aiming at this situation, the mechanical automatic processing equipment without sensor and cylinder has been designed based on some software like SOLIDWORKS and...

To research the performance of asphalt mixture with lucobit. Firstly, research the rutting resistance mechanism of Lucobit,through the results of influence rule of aggregate and asphalt for modifier and the modification mechanism of modifier show that Lucobit modifier improves the pavement performance...

For studying the influence to mine hoisting steel wire rope tension and deformation from load and elastic modulus, according to the differential equation of mine hoisting steel wire rope tension and deformation, we establish the corresponding dynamic simulation model using Matlab-Simulink, carry out...

It is a complex nonlinear problem to analyze the interaction between bind and the deformation of surrounding rocks and the depth of plastic zones as well as the deformation caused by destruction. This study tackles this problem by taking into account the size of roadway section, burial depth, rock parameters...

To investigate dynamic compressive properties of ZK60 magnesium alloys under different strain rates, the Split Hopkinson Pressure Bar (SHPB) apparatus was used at ambient temperature. The mechanics response and the correlation rules of ZK60 magnesium alloy under different strain rate compression have...

A nickel solid micro needles array is fabricated by electroplating process based on a PMMA solid micro needles mold. The PMMA mold is fabricated by the moving mask X-ray lithography method. Ni Micro needle array is fabricated by PDMS female mold which is fabricated by using PMMA micro needle array as...

this paper takes the RC type hydraulic cone crusher as the research object, using 3D software Solidworks to set up three-dimensional model , and importing it into ANSYS Workbench analysis software to get finite element analysis model, then adding material into mesh model with steps of meshing ,loading...

Stress analysis was carried out on the cone crusher, calculate the radial load of cylindrical roller bearing, good model will be built using solidworks software imported into the workbench in finite element analysis, get the cylindrical roller bearing displacement and equivalent stress distribution rule...

Extending the stress distribution result in semi-infinite anisotropic media slice with centralized force to thin circular quartz crystal resonator, the relationship of frequency relative variation and adding force azimuth and adding force strength of the resonator with radial centralized force was obtained,...

Compared with PDC bit, diamond impregnated bit have advantages in strong abrasive and hard formation according to theoretical research and field pilot experience. But the design and parameter optimization of diamond impregnated bit for different kinds of formations haven’t been done until now, and this...

In order to better assist the innovative furniture design, toy brick style combination concept is applied to furniture design. This paper analyzes the history and conception of combination furniture based on this concept, and analyzes this concept from game, DIY, green design, function design, and culture,...

In order to analyze the failure cause of welding insulation cylinder, to which explosion had happened, in a filling station, a series of experiments and analysis were taken, including macroscopic analysis, chemical composition analysis, fracture Analysis, metallographic examination and so on. The results...

In this paper, samples are first designed and made based on the orthogonal experiment law. Afterward, image gray processing and image binarization processing are performed on the electrospun nanofibres non-woven fabrics image that is captured by the electron microscope through digital picture processing...

Microcapsules containing a curing agent, 2-phenyl imidazole (2PZ), for a diglycidyl ether of bisphenol A (DGEBA) epoxy resin were prepared by a solid-in-oil-inwater emulsion solvent evaporation technique with poly (methyl methacrylate) (PMMA) as a polymeric wall. The former could take more than 3 months...

Based on the fact that aggregate surface features have a great effect on the performance of concrete, a method for improving concrete performance by modifying aggregate surface features was proposed. Specifically, with aggregates immersed into concrete interfacial agent (CIA) suspension to increase the...

In this paper, the static compression overall performance of molded pulp under different temperature were studied by experiments. The moisture content and elastic modulus of molded pulp materials , the static compression on molded pulp products were studied under the temperature of 5 C,23 C,40 C.And...

The carbon/phenolic resin composites consist of phenolic resin, natural graphite and carbon fiber, were fabricated by hot compression moulding. The effects of the mould pressure on tribological property of carbon/phenolic resin composites were investigated. The results indicated that the hardness increased,...

In this paper a control system that automatically detects the center and makes hole is presented. This control system comprises two subsystems: the Master Subsystem and the Control Subsystem. The Master Subsystem is mainly used for data processing including least squares analysis and then the result...

There are a lot of iron particles in the steel slag powder that can be recycled. In this work, the technological parameters of dry magnetic separation were optimized and the screening processwas used to replace the traditional magnetic separation process by low-intensity magnetic field.Somore than 80...

10mm thick aluminum alloys 5A02 plates were welded using MIG beam in this paper.The MIG weld formation and microstructure morphology were studied,the hardness in the weld were measured, the tensile test were made.The test result shows that the cooperation of welding current,speed and root gap can lead...

Perovskite-type oxide SrFe0.5Co0.5O3- was synthesized by citric acid method successfully. The structures of the catalyst were characterized by X-ray powder diffraction (XRD), scanning electron microscope (SEM).Using SrCo0.5Fe0.5O3- as photocatalyst, the photocatalytic properties of degrading gentian...

TiNi matrix alloy is one of widely used shape memory alloys. We studied the influence of Nb content on the microstructure of TiNiFe2 shape memory alloy. The result of experiments shows the conclusions that the matrix of Ti50-xNi48Fe2Nbx is NiTi with B2 structure and and the phase transformation point...

In China, "bamboo culture" has a long history. As bamboo has the features of growing fast with high yield, as well as high intensity, rigidity, thermal stability, and other strengths in physical performance, the application of this material in architecture will help to promote the green and sustainable...

Process parameters of AZ31 Magnesium alloy profile expanding extrusion are researched, such as extrusion temperature, extrusion speed, deformation degree, etc., and AZ31 Magnesium alloy profile expanding extrusion are implemented. Extrusion speed and production yield are effective elevated by effective...

The APDL (ANSYS Parametric Design Language) and mathematical optimization algorithm are applied for the optimization of the mushroom-shaped root-rim structure of turbine blades. In the optimization the better structure is obtained, and the maximum equivalent stress is notably reduced, which proves the...

The transmission noise is serious in five speed condition. The problematic gears of transmission are confirmed by bench noise test. The model of transmission are built and systematically analyzed with Romax software. Adjusting multi-parameters of gears in the target of reduce transmission error, mesh...

To study the shearing performance of asphalt mixture with Lucobit, AC-13C and SUP-20 asphalt mixture with Lucobit were carried out the uniaxial penetration test and the the direct shear test. The results show that the angle of internal friction of the same gradation and temperature has little difference,...

This paper focuses on the development of microstructure of TiNb 40 alloy after severe plastic deformation. Primary billets (blocks) are Ti alloy cast with 40% Nb mass which are exposed to a combined two-stages severe plastic deformation method, including abc-pressing and multi-pass rolling in grooved...