Search results

Keywords: concrete, protective coating, construction quality Abstract: reinforced concrete structures reinforced protective layer deviation will directly affect the mechanical properties and durability of the reinforced concrete member, in relation to the structure of the use of safety and service life.
The control to the protective layer of reinforced concrete structures include the following aspects: to do a good job of double sample, reinforced the blue prints.the design, production and installation of template engineering, reinforcing steel bar colligation molding process, placed, binding of fixed steel protective layer block and the requirements on the installation of the steel skeleton. 1.Introduction In addition to raw material quality factor, the reinforced concrete structures reinforced protective layer deviation will directly affect the mechanical properties and durability of the reinforced concrete member, relates to the use safety and service life of the building.
These are man-made factors, should be able to completely off the wall.
Second, the block should be reasonable and accurate binding in reinforced (main), and should not be decorate on the mechanical reinforcement, fixed firmly, prevent displacement occurred in the process of casting and slide.

Original residual stress, clamping force, cutting force and cutting heat are the main factors which causing the workpiece deformation.
However, prior works mainly focused on certain or some factors which affect the workpiece deformation.
The material properties of the workpiece and fixture elements are given in Table 2.
Material properties of workpiece and fixture elements shown in Table 2 are imported into the FEM.
Ke: Chinese Journal of Mechanical Engineering Vol.41 (2005) No.2, p.117-122 [3] S.

Al-Fe-(Cu) alloys possess sufficient conductivity and outstanding mechanical properties, so it has great potential in the electrician cable industry [1-3].
There are many factors affecting the performance of alloys, among which the chemical composition is the basic one.
For example, Fe is added in the alloy as the main alloying element to improve microstructural stability and mechanical properties.
Roy et al. [8] investigated the effect of annealing treatment on tensile properties and texture of cold rolled AA1235 alloy and showed that Al3Fe particles precipitated during the annealing process can largely affect the microstructural behaviour, tensile properties and texture of the alloy.
Orientation imaging maps (ED) of the extruded samples: (a) 1#; (b) 2# Effect of annealing on mechanical properties.

Effect study of water on the mechanical behavior of gangue in Chongqing Tongliang mine Zang Yajun 1, a 1School of Tourism and Land resources , Chongqing Technology and Business University, Chongqing 400067.
China azyjcdut@163.com Keywords: Water, Gangue, Mechanical behavior, Mine Abstract: This paper first analyzes the strength and deformation characteristics of gangue dispersion, Subsequent analysis of the effect of water on the strength, deformation characteristics.
Strength properties of gangue dispersion and effect of water on its strength Gangue dispersion on shear strength of coal gangue slope stability, safety is significant.
It is an important mechanical index determines its stability, and water is an important factor affecting the strength
Fig 5 Effect of moisture content on mechanical property of coal mining wastes For the same kind of gangue granular, compression deformation is mainly controlled by the saturation of the dispersion, in the same load, the greater the water content is, the pore is bigger than lower, deformation of greater; in addition, the compression curves of dispersion is not linear, but similar to a hyperbolic relationship.

Friction Properties study of metals by Principal Component Analysis Zhou Zhengzhu1,a, Jin Xiaoyi1,b,Zhang Xiangwei1,Yuyi Lin2 1College of Mechanical Engineering,Shanghai University of Engineering Science,Shanghai ,China 2Department of Mechanical and Aerospace Engineering, College of Engineering, University of Missouri, Columbia, USA a15000171879@163.com, bteacherjxy@126.com Keywords: friction and wear, steel 45, principal component analysis, principal component regression.
Taking 45 steel for the study in this paper, in order to understand the 45 steel in friction and wear during the load, speed, impact of the sliding distance and contact area on the friction and wear properties of the test in four factors, thus the proposed method extended to determine the friction properties of other metallic materials.
Friction and wear properties are affected by many factors and have complex relationships.
Therefore, make the following assumptions based on the design conditions of this experimental program: During the experiment, in addition to the independent variable, other factors remaining constant, such as temperature condition at room temperature.
This change will affect the friction and wear properties of material itself[8].

Finally, as result of better powder spreading property, shape quality of the parts made by WPC is improved greatly and have good as well as with good laser sintering properties.
Wood-Plastic Composites (WPC) is green biological materials, it has many advantages such as good mechanical properties, high hardness, anti-aging, dimensional stability, easy to color, with wood texture and also recycled, the most important advantage is low-cost[4].
Fig.4 shows WPC SLS parts, as the result of nonuniform powder spreading process, the parts have bad quality, lays are not in these right places, affecting their shapes, making great error and losing their function.
The main factor of powder spreading influence is shape and particle size of filler.
Study on mechanical properties enhancement of post processing WPC powder Selective Laser Sintering parts.

In this paper, some research results, including material mixture ratio, physical and mechanical properties, durability of the formwork, and working performance of concrete slab combined with stay-in-place formwork are introduced.
Material Mixture Ratio and Physical and Mechanical Properties of Formwork Experimental Materials and Methods.
Table 1 Material factors and their use levels list Factors Levels Remark No.
Mechanical Properties of “Cement Formwork– Concrete” Composite Slab Fig.3 Layout of drilling holes at formwork internal surface (unit: mm) Fig.2 Dimensions of composite slab and loading mode (unit: mm) Experiment General Situation.
Dai: Mechanical properties of concrete slab combined with formwork, Proceedings of 17th Structure Engineering Conference, Vol.2 (2008), p.115-119 (In Chinese)

By identifying relevant influences and associated characteristics affecting events, basic parameters regarding segregation of batches can be found.
Based on the factors identified, a meaningful batch ID may be generated including information on changes in particular parameters by encoding each parameter into the ID.
However, there is no 100 safety regarding resulting quality of a product because of unknown factors such as processing conditions of supplied parts.
Hence, these properties and the influences on them would be sufficient to differentiate batches for the customer.
Although this increases the usefulness of the batch subdivision and facilitates root cause analysis, it does not yet allow the customer to evaluate which factors could be responsible for a problem.

software—MSC.Marc, this article makes inversion analysis for mechanical parameters of dam.By combining the monitoring data of a dam,inversion analysis[6] is made on the elastic modulus of the dam body,dam foundation,both dam shores and the fault fracture zone by using the artificial fish swarm algorithm.Results show that using artificial fish swarm algorithm to make inversion analysis on dam mechanical parameters not only has faster con -vergence rate but also have higher accuracy.
Introduction For a dam that has been working for many years,the mechanics parameters and design of its body,foundation and reservoir rock are largely different from the experiment value.In practice,the main method for confirming mechanical parameters of the dam is on-site testing[1-4].This method involves big workload and can damage the original structure.In addition,it can only learn the physical and mechanical properties of part of the dam.Therefore,it is necessary to combine numerical analysis calculation to get ,the elastic modulus of dam body,the deformation modulus of batholiths of the dam foundation,and,the deformation modulus of batholiths of the reservoir basin in a reverse way on the basis of the normal analysis of prototype observation data,that is to say,make inversion analysis for physical and mechanical parameters of dam.Along with the constant improvement of artificial intelligence and the development of high-speed computer,neural network,genetic algorithm and particle swarm
(1)According to the actual situation,select the value range of mechanical parameters of the zone dam on which the inversion analysis[9] will be made,and initialize the fish school.Set all parameters of the fish school:fish scale N,the sensing range of the artificial fish VISUAL,the moving step length of the artificial fish STEP,crowding factor,the maximum number of iterations trynumber
(2)Derive the water pressure component by using MSC.Marc software.Organize the data block of the dam mechanical parameters by initializing the artificial fish school.
Make analytical calculation by using MSC.Marc and the water pressure component corresponding with the presumed dam mechanical parameters

The processing method for the polymer composite influences the properties of the composite including electrical and mechanical properties through the dispersion and orientation of particle during the production process.
Molding parameter such as molding time, molding pressure and molding temperature have proven will affect themechanical properties of the produced composite [14].
The Right molding parameter is essential to obtain acomposite with good mechanical properties.
Therefore, optimization process is critical to obtain nanocomposites with maximum mechanical properties especially for flexural strength.
Ferret, Effects of cure cycle pressure and voids on some mechanical properties of carbon/epoxy laminates, Compos 26 (1995) 509-515