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Online since: September 2009
Authors: Shi Chun Yang, Wen Hui Li, Sheng Qiang Yang, Hong Ling Chen
By theoretic research and simulation, main factors for finishing effect and uniformity are analyzed.
Consequently, it has effects of finishing crankshafts, increasing surface quality and improving the physical-mechanical properties [1-5].
At the same time, the degree, particles is driven to rotate, is relatively weakened, thus affecting finishing effects and efficiency.
The depth of crankshafts in machining medium is an important factor.
Conclusions Through theoretic analysis, S, f and n are main factors of affecting finishing effect and efficiency.
Online since: June 2010
Authors: Ming Duo Yang, Yong Qiang Ma, Chun Ran Han
Isolation methods, molecular structure (x-ray pattern) and important physiochemical properties of mung bean starch and influencing factors in recent studies were reviewed, which is helpful for the further and comprehensive use of mung bean starch.
Pasting properties The gelatinization temperature range of mung bean starch was 65-69-75°C [19].
The higher content of amylose in mung bean starch contributes to its special properties, different isolation methods effect the extraction rate, varieties in different areas demonstrated somewhat different properties.
Comparison of physico-chemical properties of legume starches.
Functional properties of food components, 2nded. (1991).Academic Press, New York, p.27-28 [27] T.J.Schoch and E.C.Maywald Preparation and properties of various legume starches.
Online since: September 2008
Authors: Kryspin Mirota
Knowledge of mechanical properties of vascular tissue - especially arterial tissue - is fundamental to understanding of vascular hemodynamic function.
Essential properties of arterial wall In mechanical sense, blood vessel can be treat as cylindrical shell with particular length and diameter.
Essential mechanical properties change with age.
Dobrin: Mechanical properties of arteries.
Fung: Biomechanics: Mechanical properties of living tissues.
Online since: October 2013
Authors: Shu Hao Qin, Zhi Shan, Liang Qiang Wei
Formation and performance of the main factors that affect the weld line are material properties, process parameters and die structure.
If the two strands meet melt flow front temperature difference is less than 10 ° C, then melt fusion well, almost does not affect the mechanical properties of the weld line; flow wave front greater the pressure, the more favorable melt fusion, thereby enhancing the welding the strength of the line parts [2]; confluence angle greater than 135 ° is called the fusion line, less than 135 ° is called the weld line [5], convergence angle increases, indicating that the better the performance of the weld line of work pieces appearance and The mechanical properties of the smaller.
In actual forming some weld lines led to products mechanical properties decreased significantly, while others have little effect [4].
Taguchi experimental design method is the use of the orthogonal matrix optimization of multiple experimental factors, by a small number of experiments to identify the factors and the corresponding level under the conditions used in the optimal level combination and experimental factors experimental indicators. 3. 1 To determine the evaluation index and the design variables.
Table. 2 Factor and Level factor Level Mold temperature (℃) Material temperature (℃) Injection rate (cm3/s) Holding pressure (%) 1 35 200 200 50 2 50 220 300 80 3 65 240 400 110 3. 2 Experimental results and analysis Chosen based on factors and the level of the four factors and three levels of orthogonal experimental matrix design experiment.
Online since: June 2021
Authors: Xue Li Nan, Rong Yang Li, Yi Wang, Hao Chen, Wei Bing Tang, Jian Rui Ji
Under this condition, the rheological properties of the UHPC paste are greatly improved and result in little negative impact on the mechanical properties of UHPC.
There is still little research on how glass powder affects the rheological properties of UHPC paste.
This means that has a greatly negative effect on the construction performance and mechanical properties of UHPC
It is shown that the rheological properties of the UHPC paste are greatly improved and result in little negative impact on the mechanical properties of UHPC
The effect of nano-silica and waste glass powder on mechanical, rheological, and shrinkage properties of UHPC using response surface methodology, J.
Online since: January 2006
Authors: Gai Fei Peng, Sammy Yin Nin Chan, Qi Ming Song, Quan Xin Yi
Residual mechanical properties reported in most previous literature might be overestimated, where natural cooling was usually employed.
It was believed that the main factors affecting the strength were a loss in strength of mortar, formation of cracks, and the dehydration of calcium hydrate.
Mechanical properties of concrete exposed to high temperature were also investigated by W.
Therefore, the effect of cooling regimes on mechanical properties of concrete is of great concern.
From the viewpoint of the four stages, heating rate and high temperature level are the two factors which influence the concrete properties more significantly than other factors. 2.
Online since: December 2011
Authors: Qiang Guan, Li Jun Tan, Tian Kai Xiong, Xiao Bing Xu
In this paper, a 3D-FE model in process of tube bending is built under the ABAQUS/Explicit environment based on the solution of several key techniques, such as contact boundary condition, material properties definition and meshing technology, etc.
However, because tubular materials being hollowed and the factors of multiple nonlinear factors such as material nonlinearity, geometry nonlinearity and boundary condition nonlinearity, the development of its theoretical research is at a relatively slow speed [1, 2].
The idler wheel is presumed to be rigid body so it is not necessary to assign material properties to it, while the tube is deformable body so it must be assigned material properties to model the material response to contact action or load exerted on it.
The material properties are defined by the parameters of density ρ, Young’s modulus Ε, Poisson’s ratio υ and yield strength as showed in Table 1.
The Numerical Analysis Friction is common in plasticity process, its magnitude and orientation is affected by a lot of factors [9].
Online since: February 2015
Authors: Tomáš Bittner, Petr Bouška, Miroslav Vokáč, Michaela Kostelecká
Experimental Investigation of Mechanical Properties of Textile Glass Reinforcement BITTNER Tomáš1,a, BOUŠKA Petr1,b, KOSTELECKÁ Michaela1,c and VOKÁČ Miroslav1,d 1Czech Technical University in Prague, Klokner Institute, Šolínova 7, 166 08 Praha 6, Czech Republic atomas.bittner@klok.cvut.cz, bpetr.bouska@klok.cvut.cz, cmichaela.kostelecka@klok.cvut.cz, dmiroslav.vokac@klok.cvut.cz Keywords: Textile glass reinforcement, 2D net, warp, weft, modulus of elasticity.
The type of disruption and the location of the disruption of the samples are important monitored factors.
However this difference is caused by the way in which the 2D textile is manufactured, and not by the properties of the material.
References [1] ČSN EN ISO 13934-1 Textiles – Tensile properties of fabrics – Part 1: Determination of maximum force and elongation at maximum force using the strip method
[2] ČSN EN ISO 13934-2 Textiles – Tensile properties of fabrics – Part 2: Determination of maximum force at maximum force using the grab method
Online since: April 2012
Authors: Zhen Xiang Tu
The mechanical and physical properties of Austenitic stainless steel are analyzed in detail in this paper, and the main problems of the influencing the material on machining are pointed out.
Physical and mechanical properties of stainless steel materials have greatly impacts on cutting process, for example, cutting tools are worn quickly, tool edges are easily collapsed, tool endurance are low, cutting efficiency is low, process quality is hard to guarantee which causes a lot of difficulties on cutting process.
The main problems on cutting process Austenitic stainless steel (ICr18Ni9Ti) materials have high mechanical properties, high work hardening, bad thermal conductivity.
The cutting properties of austenitic stainless steel is 40% with respect to 45 steel which its cutting properties is 100%.Hardness are greater than any materials due to work hardening, when the cutting temperature is up to 750 °c, it does not reduce the mechanical properties and increase the cutting force to make the cutting abrasion of tools seriously.
On the contrary, the wear weight loss rise which affects tool durability.
Online since: September 2019
Authors: Charnnarong Saikaew
The results showed that the operating pressure and the N2 to Ar flow rate ratio and interaction among the three process factors significantly affected the average hardness at the level of significance of 0.05.
The influences of the coating process factors such as pressure, temperature, gas flow rate ratios on coating behaviors, growth of TiN, the microstructural, mechanical and tribological properties have been reported in the previous research works [9,10].
According to the p-value of the model, operating pressure and N2 to Ar flow rate ratio and interaction among the three process factors significantly affected the average hardness at the level of significance of 0.05.
The adjusted R2 excludes statistically insignificant factors.
Only two process factors were chosen for any given contour plot.
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