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Online since: February 2013
Authors: Ke Wei Ding, Wan Yun Yin, Gang Wang
The simple structure of single material wall construction is also very convenient, but its thermal insulation properties and high-performance materials in wall insulation gap significantly.
Internal wall insulation preservation performance is good, but due to the materials, construction and other factors, which to cause cracking and cannot effectively solve the “cold bridge” building envelop insulation performance, and prone to condensation, damp, or moldy drips the water and other phenomena in the cold bridge place.
Sandwich wall panel of the lateral walls need to be supported at various levels, the resulting wall there are lots of cold bridge phenomenon and its insulation performances greatly affected.
Specific failure mode is closely related with the panel and the material properties of the core material, structural and loading patters.
Surface layer, the core material and the material properties of the cement layer on the structural strength and delimitation extension loads have a certain impact, Therefore, as far as possible to improve the properties of the surface layer to improve the sandwich structural strength.
Online since: December 2012
Authors: Milan Brandt, Song Lin Ding, John Mo, Richard Webb
Introduction The super-high hardness and excellent wear resistance properties of Polycrystalline Diamond (PCD) have led to the wide application of PCD tools in woodworking, automotive and aerospace industries [[] S.
For example, the effects of eight factors need to be analyzed in our system design.
Seven of the eight factors have 4 levels, while one factor has 2 levels.
Signal is the square of the mean value of the results; whereas noise is a measure of the variability of the response, it is caused by uncontrollable factors (noise factors).
L32 suits an experiment of 1 factor with 2 two levels, and 7 factors with 4 levels.
Online since: December 2010
Authors: C.J. Heckmann, W. Stets, G. Wolf
Furthermore, certain mechanical properties in the area of the plate fracture, especially the fracture elongation are reduced [5].
All relevant casting parameters were modified in certain ranges during the casting trials to identify all possible influencing factors for the appearance of plate fracture.
Furthermore, samples with a hypo-eutectic chemical composition (upper shelf section) were mainly affected by plate fracture
By using basic trial parameters sample C never was affected by plate fracture.
Therefore, it appears to be very reasonable, that especially the temperature gradient and as well the velocity of the liquid/solid interface are the main influencing factors for the formation of coarse dendrites [6].
Online since: October 2013
Authors: Róbert Čep, Jan Valíček, Marta Harničárová, Adam Janásek, Jana Petrů, Marek Sadilek, Petr Mohyla, Andrej Czán
The quality largely affects the component life and the reliability [4].
On these aspects depends other important factors as noise, electrical conductivity, accuracy, heat transfer, friction, corrosion resistance and others.
Table 6 Factor analysis; two variables Number of Combinations x1 x2 x1 x2 z 1 vcmin fzmin -1 -1 z1 2 vcmin fzmax -1 1 z2 3 vcmax fzmax 1 1 z3 4 vcmax fzmin 1 -1 z4 In planning of experiment we were monitoring one of the output parameter during changing of more input factors.
The most important factors, which had an affect on output parameter, are cutting conditions (depth of cut, feed rate, cutting speed, tool geometry, mechanical properties, machine tool, etc.).
Proceedings of the Institution of Mechanical Engineers. (1978), No. 192. p. 178-188
Online since: May 2014
Authors: Yi Qin, Gang Yang, Yi Yang, Xian Zhi Yang, De Qiang Yin
Introduction 316L stainless steel has been widely used in automotive, structural, and medical applications attributed to its excellent mechanical properties and corrosion resistance behavior [1].
Previous researches have investigated the factors affecting the densification of rapid heating sintering methods.
Different from the conventional sintering process wherein the sintering of complex green bodies may be predicted by via a continuum mechanical model incorporating sintering stresses and sintering viscosities, the powder system in this experiment was discontinuous at the beginning, namely, when an AC current passes through a compact, each particle becomes a resistance.
Varol, Mechanical properties of P/M 316L stainless steel materials, Powder Technology. 201 (2010) 242-247
Lia, Influence of sintering temperature and holding time on the densification, phase transformation, microstructure and properties of hot pressing WC-40 vol.
Online since: April 2011
Authors: Zhi Ming Zhou, Li Wen Tang, Min Min Cao, Jing Luo, Xiao Ping Li, Wei Jiu Huang, Hua Xia, M. Deng
These so called alloys have outstanding combination of high mechanical strength with good electrical conductivities [1,2].
Copper containing cast irons are of improved mechanical properties such as fatigue life and tensile stress endurance at elevated temperatures.
For simplicity, this physical model is dealt with using the following assumptions: (1) Mass transfer in liquid and solid is neglected; (2) The physical properties of the ribbons and the cooling wheel are constant, and are independent of temperature; (3) There is no gap between the ribbon and the cooling wheel, so that only heat conduction is considered. (4) The thermal resistance is neglected. 1.2 Heat transfer governing equation The initial temperatures within the ribbon and the cooling wheel are uniform at T10 and T20, respectively.
The enthalpy of the castings has great influence on the crystallization of rapid solidification of CuFe10 ribbons, which will result in major calculation errors if this factor is not considered.
The factors affecting the temperature distribution and the cooling rate are discussed according to the cooling rare function.
Online since: September 2013
Authors: Xiao Ming Qian, Peng Zhang, Hong Wei Cai, De Peng Guo
It shows that Technological Process Problem (U) and Operational Errors (W) respectively accounted for the total number of 27% and 44%, constitute the two most important factors for causes of non-conformance.
More nonconformity of Domestic RPV happens in physicochemical properties, heat treatment, manufacturing technology, which are mainly due to: (1) Mechanical properties and chemical composition of raw materials (including welding material) does not meet the design requirements; (2) The temperature of preheating, post heating and stress-relief treatment during welding process exceeds the specified range; (3) During the process of turning requirements of designer into technology, manufacturer made ​​a mistake or omission, so that the practical process (welding, heat treatment, nondestructive testing, assembly, etc.) can not meet the technical requirements of the designer.
This kind of problem has seriously affected the progress of equipment manufacturing, but also to the quality of the equipment.
External Factor of Nuclear Power Development.
Besides, affected by Fukushima Nuclear Crisis, the suppliers decrease the manpower and resource investment of nuclear project.
Online since: June 2011
Authors: Ion Mitelea, Corneliu Craciunescu, Claudia M. Dorohoi
The paper details the process of electric stored-energy point welding, the structural and phase transitions in the welded seam and in the heat affected zone, as well as the influence of the welding process on the shape memory effect. 1.
Introduction Shape memory alloys have unique properties and the range of applications has been increasing in recent years.
Shape memory joining in general and of NiTi in particular is considered a difficult task, especially on what concerns welding in dissimilar architectures and is an additional factor to be considered when such materials are used [1-5].
Among the main difficulties related to shape memory alloys welding [6-10], one can mention: - overheating phenomena may lead to a permanent loss of the shape memory effect in some alloy families [11] and - the local change in the chemical composition may effectively destroy or affect the martensitic transformation due to the fact that the composition is an essential factor in the fabrication of shape memory alloys with a desired temperature range for shape recovery Friction [12], ultrasonic [13, 14] or electric resistance welding are solutions considered for welding shape memory alloys with the aim to reduce the heat affected areas.
The optimization of the welding parameters needs to be made in order to avoid local melting and the formation brittle of intermetallic compounds in the melted and heat affected zone.
Online since: May 2012
Authors: Xin Sheng Yin, Pang Feng Ba, Jing Wei Cai
The result shows that the value of the coefficients of the pile endpoint resistance reduces with the rising of the value of depth and the value is affected by the size of the pile head and the soil parameters.
The mechanical properties of soil are so complicated that stress-strain relations of it perform non-linear, elastic- plasticity, visco-elasticity, dilatancy, anisotropy and so on[1].
And many factors such as stress paths, material strength, material construction , material composition and the state ,the temperature of soil influence the coefficient of pile endpoint resistance.
So the key to use small area method is to identify a reasonable coefficient depending on the basic soil properties and it is wrong to identify the coefficient depending on the area ratio of inner and outer pile tips.
Online since: November 2025
Authors: Rugi Vicente C. Rubi, Trixccia Ann R. Gallamos, Danielle F. Fajardo, Marco C. Gidayawan, Emmanuel B. Carpio, Edrian E. Terciano, Jayson D. Binay
Stability within the corrosive environment and compatibility with the metal substrate are essential factors.
The use of a CPE is significant because it accounts for the imperfect nature of the electrode surface, which can manifest as irregularities or roughness, affecting the electrochemical reactions.
Two main factors contribute to this decrease: the degradation of the inhibitor film and the formation of a less protective layer on the substrate.
The inhibitor film prevents corrosive substances from reaching the substrate, but over time, environmental factors or chemical reactions can degrade it.
Corrosion inhibition properties of pyrazolylindolenine compounds on copper surface in acidic media.
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