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Online since: September 2013
Authors: Prabhat Kumar
MANUFACTURE OF PFBR EQUIPMENT AND MAIN CONSIDERATIONS:
The major factors considered for the selection of materials include operating conditions, availability of design data in nuclear codes, ease of fabrication, International experience and safety [2,3].
In addition, this steel also possesses excellent mechanical & creep properties.
Grain size & chemical composition of above steel has been precisely specified with upper & lower values to optimize the mechanical & creep properties.
During plate procurement, high temperature tensile test is also carried out in addition to tensile test at ambient temperature on specimens to evaluate & ascertain the properties for service conditions.
A number of cutouts are provided in the top and bottom plates and in vertical stiffeners to enable access for welding to all regions during manufacture and to reduce the total weight without affecting the overall stiffness of the structure.
In addition, this steel also possesses excellent mechanical & creep properties.
Grain size & chemical composition of above steel has been precisely specified with upper & lower values to optimize the mechanical & creep properties.
During plate procurement, high temperature tensile test is also carried out in addition to tensile test at ambient temperature on specimens to evaluate & ascertain the properties for service conditions.
A number of cutouts are provided in the top and bottom plates and in vertical stiffeners to enable access for welding to all regions during manufacture and to reduce the total weight without affecting the overall stiffness of the structure.
Online since: February 2011
Authors: Feng Li, Xiao Chen, Ren Yuan Zhang
The main constituents of coatings remain invariant and the coatings have excellent properties of bond strength and thermal shock resistance.
Heat collection, heat storage and evapour production are the main factors in the system of solar thermal power generation.
MoB/CoCr coatings have properties of good corrosion resistance, heat resistance and wear resistance in the aluminum alloy [5,6].
Also, structures and properties of coatings are studied.
And there also existed certain mechanical bond between bond coating and substrate.
Heat collection, heat storage and evapour production are the main factors in the system of solar thermal power generation.
MoB/CoCr coatings have properties of good corrosion resistance, heat resistance and wear resistance in the aluminum alloy [5,6].
Also, structures and properties of coatings are studied.
And there also existed certain mechanical bond between bond coating and substrate.
Online since: September 2013
Authors: Hui Xu, Guo Bin Li, Qian Qian Shang
The former two are wall resistance, and the resistance caused by vegetation is used for affecting the water body along the depth direction.
Resistance coefficient of submerged plants decreases in nonlinearity mode as submerging degree increases, the bigger plant density, the faster decrease speed is, but degenerative speed gradually decelerates and roughness factor coefficient trends to be a constant; the contribution that side-wall has on roughness factor gradually increases when submerging degree is big enough and roughness factor coefficient will tend to be stable.
The appearance position of maximum value of turbulence intensity is affected both by plant density and plant relative height .
The research mainly adopts project effect as guidance, but systematically mechanical theory research and mathematical model simulation technique research are rare.
[19] Turbulence Intensity Maximum and its Influence Factors in Submerged River Flow with Plant.
Resistance coefficient of submerged plants decreases in nonlinearity mode as submerging degree increases, the bigger plant density, the faster decrease speed is, but degenerative speed gradually decelerates and roughness factor coefficient trends to be a constant; the contribution that side-wall has on roughness factor gradually increases when submerging degree is big enough and roughness factor coefficient will tend to be stable.
The appearance position of maximum value of turbulence intensity is affected both by plant density and plant relative height .
The research mainly adopts project effect as guidance, but systematically mechanical theory research and mathematical model simulation technique research are rare.
[19] Turbulence Intensity Maximum and its Influence Factors in Submerged River Flow with Plant.
Online since: February 2011
Authors: Hui Gao, Zai Liang Chen, Xin Zhang
Three Dimensional Parametric Design Of The Die Channel For Plastic Extrusion Based On SolidWorks
Hui Gao a, Zailiang Chenb and Xin Zhang c
Department of Mechanical Engineering, Soochow University, Suzhou, Jiangsu, 215104, China
agaohui3037@gmail.com, bchenzailiang@suda.edu, czxanm2003@163.com
Keywords: Die Channel; Parametric Design; SolidWorks.
The design intention could be reflected more intuitively and comprehensively based on 3D CAD(Computer Aided-Design) software.Futhermore,the use of 3D solid-modeling can improve the efficiency and quality of design,shorten time-to-market and reduce product development costs[1,2] There are many excellent 3D modeling software,all of them can realize the model design.However,there is still a lot of repetitive work in the process of designing the building models.The fundamental reason is as follows:the size of these models is needed to change according to different customers,but the topology is essentially the same,which greatly affected the product development cycle.To solve such problems,one of the key technologies is parametric design technology.
Die Channel For Plastics Extrusion The geometrical property of product is greatly affected by the performance of extrusion die.
The difficulty in die design arises from the large aspect ratio of the product geometry of polymer extrusion process.In order to get uniform thickness of product,the extrusion die has to be designed to produce uniform flow rate distribution at die exit in the transverse direction.In industry there are three kinds of extrusion die commonly used,they are T-die,fish-tail die and coat-hanger die.Among them coat-hanger die is preferred ,thanks to its superior flexibility of geometry which is very important factor for the achievement of higher performance.
The design intention could be reflected more intuitively and comprehensively based on 3D CAD(Computer Aided-Design) software.Futhermore,the use of 3D solid-modeling can improve the efficiency and quality of design,shorten time-to-market and reduce product development costs[1,2] There are many excellent 3D modeling software,all of them can realize the model design.However,there is still a lot of repetitive work in the process of designing the building models.The fundamental reason is as follows:the size of these models is needed to change according to different customers,but the topology is essentially the same,which greatly affected the product development cycle.To solve such problems,one of the key technologies is parametric design technology.
Die Channel For Plastics Extrusion The geometrical property of product is greatly affected by the performance of extrusion die.
The difficulty in die design arises from the large aspect ratio of the product geometry of polymer extrusion process.In order to get uniform thickness of product,the extrusion die has to be designed to produce uniform flow rate distribution at die exit in the transverse direction.In industry there are three kinds of extrusion die commonly used,they are T-die,fish-tail die and coat-hanger die.Among them coat-hanger die is preferred ,thanks to its superior flexibility of geometry which is very important factor for the achievement of higher performance.
Online since: October 2025
Authors: Riska Rachmantyo, Lia Amelia Tresna Wulan Asri, Richard Adventus Hutasoit
Other factors supporting this phenomenon include their relatively low price, light weight, and reasonable durability.
The main reason for this is that not all plastics have biodegradable and reactive properties.
The main factors influencing the increase in compressive strength of concrete are the physical and mechanical properties of the sand used.
This influences the mechanical properties of the aggregate such as higher stiffness, density, and crystallinity.
Pekmezci, Mechanical and physical properties and morphology of concrete containing plastic waste as aggregate, Constr Build Mater 257 (2020)
The main reason for this is that not all plastics have biodegradable and reactive properties.
The main factors influencing the increase in compressive strength of concrete are the physical and mechanical properties of the sand used.
This influences the mechanical properties of the aggregate such as higher stiffness, density, and crystallinity.
Pekmezci, Mechanical and physical properties and morphology of concrete containing plastic waste as aggregate, Constr Build Mater 257 (2020)
Online since: May 2011
Authors: Zhan Guang Wang, Ping Cai, Zhen Wu Wang
Properties of uniaxial compression, energy absorption capability and energy absorption efficiency have been studied.
Properties of energy absorption are characterized by energy absorption capacity W and energy absorption efficiency E. [2] (3) which ε is strain,σ is compressive stress.
The densification starting point and fracture morphology are important factor to affect energy absorption.
The matrix bears stress when it is compressed, then holes deform ,which can largerly deform, so they have excellent compressive properties.
Gibson, M.F.Ashby:Cellular Solids: Structure and Properties (Cambridge University Press, UK1997)
Properties of energy absorption are characterized by energy absorption capacity W and energy absorption efficiency E. [2] (3) which ε is strain,σ is compressive stress.
The densification starting point and fracture morphology are important factor to affect energy absorption.
The matrix bears stress when it is compressed, then holes deform ,which can largerly deform, so they have excellent compressive properties.
Gibson, M.F.Ashby:Cellular Solids: Structure and Properties (Cambridge University Press, UK1997)
Online since: November 2013
Authors: Tijjani Adam, C.H. Voon, U. Hashim, Mohd Nazree B. Derman, K.L. Foo
It was found that the increasing anodizing voltage affect the morphology and dimensional parameters of porous AAO.
The regularity of porous AAO was affected by anodizing voltage.
Since the properties of nanostructured materials are significantly influenced by the dimensions, it is important to synthesis nanostructured materials of uniform dimensions [3, 9, 10].
Conclusions In conclusions, the anodizing voltage has significant effect on the morphology, dimensional properties and growth kinetics of the porous AAO.
Asoh, Controlling factor of self-ordering of anodic porous alumina, J.
The regularity of porous AAO was affected by anodizing voltage.
Since the properties of nanostructured materials are significantly influenced by the dimensions, it is important to synthesis nanostructured materials of uniform dimensions [3, 9, 10].
Conclusions In conclusions, the anodizing voltage has significant effect on the morphology, dimensional properties and growth kinetics of the porous AAO.
Asoh, Controlling factor of self-ordering of anodic porous alumina, J.
Online since: August 2013
Authors: Bo Wen Hou, Liang Gao, Pu Wang
There are plenty of curves because of some limiting factors like the terrain.
Mehrgou M et al. [7] analyzed effects of track properties (rail cant, gage width, et al.) on wheel rolling contact fatigue through simulations using ADAMS/Rail software.
Elastic and dissipative properties of track are taken into account by introducing stiffness and damping for rails in longitudinal, lateral and vertical directions.
Journal of Mechanical Engineering, 2009, 45(5): 39-44.
Influence of track properties on railway vehicles wheel rolling contact fatigue [C]// ASME International Mechanical Engineering Congress and Exposition.
Mehrgou M et al. [7] analyzed effects of track properties (rail cant, gage width, et al.) on wheel rolling contact fatigue through simulations using ADAMS/Rail software.
Elastic and dissipative properties of track are taken into account by introducing stiffness and damping for rails in longitudinal, lateral and vertical directions.
Journal of Mechanical Engineering, 2009, 45(5): 39-44.
Influence of track properties on railway vehicles wheel rolling contact fatigue [C]// ASME International Mechanical Engineering Congress and Exposition.
Online since: January 2017
Authors: Ya Quan Xin, Ling Li, Li Yuan Fan
Introduction
Epoxy resin (EP) were widely used in electric devices owing to their good dimensional stability , chemical resistance, electrical insulation and excellent mechanical properties.
Through on the rheological properties of the resin matrix can predict the viscosity of the resin system changes during the curing process.
Zou et al[3]. reported that applied the ANN to simulate the mechanical properties of the composite foam.
Sun et al[4]. has finished the work about predict the mechanical properties of wood composite with application of ANN.
In the initial stage of the reaction ,the cuing degree is low, the temperature is the main factors influence in the system viscosity.
Through on the rheological properties of the resin matrix can predict the viscosity of the resin system changes during the curing process.
Zou et al[3]. reported that applied the ANN to simulate the mechanical properties of the composite foam.
Sun et al[4]. has finished the work about predict the mechanical properties of wood composite with application of ANN.
In the initial stage of the reaction ,the cuing degree is low, the temperature is the main factors influence in the system viscosity.
Online since: November 2013
Authors: Jun Dong, Pei Chi, Hai Feng Bo, Yang Peng, Bei Bei Wang
The behavior of un-strengthened masonry panels that are subjected to in-plane seismic excitation depends on different parameters mainly related to their geometrical and mechanical properties as well as the loading and boundary conditions [11].
Taking these factors into account, an experimental study was carried out to investigate the shear behavior of the strengthened masonry panels using the proposed strengthening method in this paper.
(e) (f) (g) (h) Fig. 2 Dimension and photos of strengthened masonry panels Mechanical properties of material.
The mechanical properties of the bars and steel members are shown in Table 4, respectively.
Mechanical properties of concrete and mortar Material No. of test load block Ultimate load Fu [kN] Compressive strength fc [MPa] Concrete 1 440.78 19.58 2 465.76 20.69 3 482.47 21.56 Mortar 1 41.68 8.30 2 43.56 8.76 3 42.63 8.53 Table 4 Mechanical properties of steel members and rebar Material Thickness t [mm] Diameter d [mm] Yield strength fy [MPa] Ultimate strength fu [MPa] Steel strips 1.5 ― 337.21 424.88 3.0 ― 342.78 433.91 Connection plate 5.0 ― 385.33 485.52 Tie ― 4 388.13 522.16 Longitudinal reinforcement ― 6 540.37 702.12 ― 8 562.46 758.18 Test setup and loading scheme.
Taking these factors into account, an experimental study was carried out to investigate the shear behavior of the strengthened masonry panels using the proposed strengthening method in this paper.
(e) (f) (g) (h) Fig. 2 Dimension and photos of strengthened masonry panels Mechanical properties of material.
The mechanical properties of the bars and steel members are shown in Table 4, respectively.
Mechanical properties of concrete and mortar Material No. of test load block Ultimate load Fu [kN] Compressive strength fc [MPa] Concrete 1 440.78 19.58 2 465.76 20.69 3 482.47 21.56 Mortar 1 41.68 8.30 2 43.56 8.76 3 42.63 8.53 Table 4 Mechanical properties of steel members and rebar Material Thickness t [mm] Diameter d [mm] Yield strength fy [MPa] Ultimate strength fu [MPa] Steel strips 1.5 ― 337.21 424.88 3.0 ― 342.78 433.91 Connection plate 5.0 ― 385.33 485.52 Tie ― 4 388.13 522.16 Longitudinal reinforcement ― 6 540.37 702.12 ― 8 562.46 758.18 Test setup and loading scheme.