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Online since: May 2014
Authors: Guo Yong Liu, Xue Feng Ma, Hong Jiang, Dong Mei Zhu, Shao Jun Zhang
He used finite element coupling numerical simulation method to analyze the factor of cooling water flow, such as the cross-sectional areas of the cooler entrance and the speed of the cooling water [3].X.M.
In order to obtain accurate simulation results the physical properties of materials with the variation of temperature needs to be considered during the FEM calculation.
Results of numerical simulation Influence factors on temperature field uniformity because of the diameter and the number of nozzles.
With the increased number of nozzles, the heat transfer is affected between the steel bar and the cooling water due to the interference between the nozzles.
The influence factors on temperature field uniformity because of the distance between the nozzles and the surface of the bar.
Online since: July 2011
Authors: Xian Qing Xiong, Zhi Hui Wu
Rice-straw board is usually produced by isocyanate adhesive, it is formaldehyde-release while using, uniform density, smooth surface, no obvious color difference, mechanical property is in keeping with GB/T 4897.1~4987.7-2003 , can be processed as secondary veneer or milling, punching, notch, bend, carve, paint and so on [1], and be widely used in cabinet work, building decoration and packaging industry [2].
It can be seen from the experimental results, gloss of lacquerfilm has close relation with the gloss of 50% flat lacquer that we used. gloss of the crackle-simulated coating model belongs to flat gloss, which is in accordance with the QJ/HR-2006 and GB/T 4893.1-4893.8-2005(gloss14-35%), Matt Ⅱ (15-24%). crackle-simulated pattern on the surface and paint film property itself will weaken the gloss of top-coat.
Seen from the coating test procedure, surface effect of crackle-simulated coating is conditioned by sanding technology, interior temperature and humidity as well as coating operation and so on, especially interior temperature and humidity affected greatly on paint film property.
Factors that affect the cost of painting including three parts: efficiency of construction, production engineering, coating thickness.
Factors affect the environmental protection which are usually mentioned in paint of furniture are menstruum and firming agent, according to the national standards., when content of harmful material is greater than 0.3mg/m³, means it is destroying environment.
Online since: September 2014
Authors: Benjamin Valdez, Alexey Pestryakov, Vitalii Petranovskii, Rainier Romero, Larysa Burtseva
This paper summarize idealized theoretical studies of bicomponent particle packing parameters, affecting the phase and pore structure of the obtained materials.
These parameters are utilized to estimate the density and porosity of filled space, the average coordination number, etc., as well as to estimate the influence of those parameters on the structural properties of a packing, e.g., the transport properties in porous media [2-4].
Increasing this criterion by a factor 10 does not increase the number of contacts substantially, while decreasing by a factor 2 gives no contacts [11].
An example of computer approach, which is not based on the gravitational movements, is Voronoi-Delaunau tessellation technique used to predict the transport properties of the porous medium for ordinary diffusion.
Philipse, Simulation of random packing of binary sphere mixtures by mechanical contraction, Physica A: Statistical Mechanics and its Applications, Vol. 358, no. 2–4, (2005), 249-262
Online since: March 2021
Authors: Samson Olalekan Odeyemi, Mutiu Adelodun Akinpelu, Bilyamin Adeoye Ibitoye, Kabir Opeyemi Olorede
Results of the numerical study revealed that the concrete strength and shear span to depth ratio mostly affect the load-deflection response of the beams.
These deficiencies can severely deteriorate the materials mechanical properties and thus, jeopardizing structural integrity and durability of the entire structure.
However, evaluation of the structural performance of structures constructed with the newly introduced SCC is necessary considering the reported differences in its mechanical properties when compared to the VC.
In the second part, numerical simulation was conducted to evaluate various parameters affecting the shear behaviour of reinforced concrete deep beams.
Detail of the beam dimensions is shown in Fig. 3 while the properties of the specimens are detailed in Table 2.
Online since: June 2012
Authors: Hong Ling Yuan
Forming over, cooling device cools the inner shell and then the part is stripped off and delivered to the following stations for trimming and inspection. [2] The Forming Introduction of Freezer Inner Shell Figure 1 presents a certain type of refrigerator inner shell, and the material is thermoplastic ABS, with the characteristics of low shrinkage rate, high toughness and mechanical strength, steady dimension, excellent chemical resistance and good electrical property and it absorbs moisture easily.
And this material is easy to be formed and mechanical processed. [3] The shell structure is not complex.
The freezer inner shell is the main component of a refrigerator, and its forming quality will affect the fridge appearance and other forming process, such as foaming process.
In order to make full use of the equipment and to improve the production efficiency, we can use the freezer dual mode structure, as Figure 2 shows: Fig.1 Freezer inner shell of a refrigerator Fig.2 Dual mode structure Vacuum Plastics-absorption Mould Design for Freezer Inner Shell of a Refrigerator In the vacuum plastics-absorption forming, the mold is the key factor that affects the product quality, production efficiency and production cost.
Fig. 4 Slide block core-pulling mechanism Fig. 5 Slide block The fitting clearance between slide block and mould greatly affects the movement of slide block and the surface quality of the shell parts, and the unilateral clearance takes 0.05 ~ 1 mm.
Online since: February 2014
Authors: Ning Mao, Jing Xian Liu, Yu Jie Zhang
PTFE maintain excellent mechanical properties at wide temperature range -196 ~ 260 ℃.Its chemical corrosion resistance and weatherability are good, except molten alkali metals, PTFE almost resistants any chemical corrosion.
Bag’s sew line is one of the factors which influences the broken bag in the filter property.So, before the bag puts into use, tension strength test should be done on the bag’s sew line .
When using different filter materials in line, it must be superior in the tested line in strong, heat resistant, chemical resistant and thermal expansion properties to that of the same filter material .
But testing after the line was heated at 180℃ for 24h, its strength has little change, the heating time has little influence on the properties of the suture, but the work state has great influence on the performance .
The temperature above 200℃ will make large changes in properties of the suture. 3 Tensile strength values drop much in the heating conditions of the 10min, but in 24h after heating and cooling to room temperature conditions strong values changes unobvious .
Online since: December 2013
Authors: Azma Putra, A. Rivai, Wai C. Mun, M Noryani
Forskitt et al. [4] used the Finite Element Method (FEM) to obtain the dynamic properties, namely Young’s modulus and Poisson’s ratio of a perforate.
These properties are then used to calculate the natural frequencies of the perforated panel.
As previous models concern with only the dynamic properties, this paper investigates the change of vibration level due to the introduction of holes into a solid panel.
Hill, Effective bending properties for stress analysis of rectangular tubesheets, J.
Brook, Elastic properties of plates perforated by elliptical holes, Appl.
Online since: November 2024
Authors: Ki Woo Nam, Sang Hyun Park, Hyungseok Nam
Tables 1 and 2 show the mechanical properties and chemical composition, respectively.
Based on prior research, the FSW selected conditions that showed optimal mechanical properties.
Table 1 Mechanical properties.
Shot peening is a cold working process that alters the mechanical properties on the metal’s surface and creates a compressive residual stress layer.
Japan Society of Mechanical Engineers
Online since: June 2019
Authors: Pavel Sulak, Vojtěch Kostiha, František Girgle, Petr Štěpánek, Ondřej Januš
It is well-known that test configuration affects bond behaviour of steel reinforcement, but this effect has not yet been sufficiently quantified when using FRP reinforcement.
The mechanical properties of the reinforcements used were experimentally determined before the tests (see Table 2).
Table 2: Mechanical properties of used reinforcement Bars Diameter of bar core [mm] Diameter of bar including surface treatment [mm] Average tensile strength [MPa] ± standard deviation Average elastic modulus [GPa] ± standard deviation GFRP.E.EP.K.14 14 15.23 980 ± 9.6 52.1 ± 1.6 GFRP.E.EP.N.14 14 15.02 654 ± 14.6 46.1 ± 0.8 GFRP.E.EP.II.N.14 14 14.27 872 ± 10.3 43.3 ± 1.3 GFRP.R.12 12 13.43 1445 ± 72.1 59.9 ± 0.4 Steel.14 14 - *574 ± 3.5 199.1 ± 7.7 * yield strength of steel reinforcement Modified beam test.
Cosenza, Experimental and analytical evaluation of bond properties of GFRP bars, Journal of Materials in Civil Engineering, 13(4), pp. 282-290, 2001
Kaklauskas, Mechanical Properties of the Bond Between GFRP Reinforcing Bars and Concrete, Mechanics of Composite Materials, 50(4), pp. 457-466, 2014
Online since: January 2021
Authors: Piotr Bobrowski, M. Prażmowski, Henryk Paul, Magdalena M. Miszczyk, Robert Chulist
These processes strongly affect functional properties of the clad [2-3].
This leads to decrease of the strength properties of the clad.
It is clear that they play a decisive role in shaping of the clad mechanical properties.
Pstruś, The effect of detonation velocity and stand-off distance on the interface morphology and electro-mechanical properties of Ti/Cu clad composites produced by explosive welding, Metal.
Gülenç, Microstructural and mechanical properties of Cu-Ti plates bonded through explosive welding process, J.
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