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Online since: July 2003
Authors: K.T. Ramesh, Yu Long Li
It is well known that the mechanical properties of most materials are influenced to some extent by strain rate.
The stress level on which the incident pulse is unloaded is independent of dashpot properties.
However, the stress level at which the reflected pulse starts is strongly dependent on the dashpot properties.
Compare with experiment: From above results, the stress level to which the incident pulse is unloaded and the stress level at which the reflected pulse starts are affected by actuator properties, pulley disk properties and the incident stress pulse parameters.
It seems difficult to find a simple relation to consider the effect of these factors.
Online since: February 2026
Authors: Merlin Mba Ngouono, Thomas Kanaa, Paul William Huisken Mejouyo, Ebenezer Njeugna
Next, the primary factors significantly affecting both process quality and final product quality are identified.
These differences in supply sources have a direct impact on the chemical composition of the final alloy and, consequently, on the mechanical properties and durability of the pots.
These differences in finishing methods have an impact on the aesthetic appearance of the products and, to a lesser extent, on their mechanical and surface properties.
Current practices, characterized by high variability and a lack of quality control, lead to significant lead contamination of finished products, jeopardizing consumer health and significantly influencing the physical and mechanical properties of artisanal products.
Lim et al., « A comparative risk assessment of burden of disease and injury attributable to 67 risk factors and risk factor clusters in 21 regions, 1990–2010: a systematic analysis for the Global Burden of Disease Study 2010 », The lancet, vol. 380, no 9859, p. 2224‑2260, 2012
Online since: February 2024
Authors: Olayinka Akeem Oladapo, Akintayo Oladimeji Akindele, Olusegun Adebayo Ajala, Adebowale Martins Obalalu
By examining the dynamic flow properties of MHD dusty Casson nanofluids, the study elucidates how they can be beneficial in different industrial procedures.
Brownian motion and thermophoresis, when combined in nanofluids, can result in better heat transfer properties.
The primary objective of this research is to examine how different factors, including thermal radiation, activation energy, binary chemical reactions, and variable transport properties, affect the flow of nanofluids and heat transfer over a permeable stretching surface in a non-Darcian Casson flow.
The research challenges the traditional assumption of constant fluid properties and suggests that factors like viscosity, thermal conductivity, and thermal diffusivity change with temperature.
The Casson parameter, which is connected to the yield stress of the fluid, is one of the factors that determines how the velocity profile of the fluid moves through the pipe.
Online since: March 2016
Authors: Xing Liang Gao, Miao Yong Zhu, Dong Xu, Bing Zheng
These papers discussed the diffusion behavior of C element in the ferrite, martensite, austenite, and the C diffusion behavior was studied how to affect the metals properties.
Solid solution type can also affect the diffusion coefficient.
According to the traditional classic theory, for the same experimental state, the factor that affects the diffusion of the same experimental material in the same solid phase is mainly temperature.
It is believed that the total diffusion behavior is influenced by two factors.
All these factors lead to the result that the non-linear relationship between the total decarburized layer and temperature.
Online since: December 2013
Authors: Chuan Fu Ma, Jun Man Kan, Li Quan Guo, Ming Wu
Extraction of the polysaccharides is the first and a necessary step in the effective exploitation of their structure and functional properties [5].
Among them, UAE method has the advantage of accelerating the extraction process, causing less damage to the structural and molecular properties of plant materials [7].
Results and discussion Effects of various factors on the extraction yield of RAP.
Effects of various factors on the extraction yield of RAP Optimum conditions for RAP extraction.
As shown in Table 1, the degree of affecting the extraction yield of RAP was A>B>D>C.
Online since: February 2012
Authors: Young Suk Kim, Dong Won Jung, Duc Toan Nguyen
Analytical and experimental procedures Materials By referring the mechanical properties of tested material from H.
Table 1 Material Properties Young`s modulus 70 GPa Yield strength 96 MPa R – value 0.8 Poisson`s rate 0.3 Work-hardening exponent (n) 0.26 Plastic coefficient (K) 179 MPa Ductile fracture criterion Based on various hypotheses, some criteria for ductile fracture have been proposed Oyane et al. [1] proposed a criterion allowing for the history of the hydrostatic stress affecting the occurrence of ductile fracture, and it has been widely applied in the field of sheet forming with high reliability [4, 5].
Fig. 2 a) Definition of factors b) experiment with fracture c) simulation result where I reach 1.0.
The number for each column is related to the level number for each factor.
In this study, only the individual effects of each factor on the FE simulation were investigated, without considering the interactions between each factor.
Online since: June 2012
Authors: Ying Sun
The safety of pipelines depends on the high toughness of steels and the toughness of pipeline steels is a main factor on pipeline fracture.
However, it was found that besises pure steels and acicular ferrite that are the main factors for improving the toughness of pipeline steels, the grain size of polygonal ferrite plays important role in the shear-area percentage of DWTT fracture of pipeline steels.
,oC Rough rolling temp., oC Rough rolling temp., oC Cooling rate, oC/s Final cooling temp., oC 1 1220 1050 790 16 500 2 1220 1050 790 14 500 3 1220 1050 790 10 500 4 1220 1050 790 10 530 5 1220 1050 790 10 550 Table 2 Mechanical properties of X70 pipeline steel No.
Thus it can be seen the portion and the size of polygonal ferrite greatly affect DWTT fracture toughness.
Conclusions (1) The shear-area percentage of DWTT of X70 pipeline steel is affected by the content of polygonal ferrite.
Online since: August 2013
Authors: Jian Xiong Liu, Yu Chun Dang, Kun Xu, Yi Zhou, Jiang Wei
The main reasons that limit the performance of TiO2 electrode is its low real capacity which caused by poor conductivity and other factors.
The primary research of LIBs currently is improving the properties of electrode materials.
Many scientists have adopted these forms of material to use in batteries and test the electrochemical properties, the results showed large capacity over 230mAh/g [26-29].
Graphene is a 2-D sheet of carbon atoms with a honeycomb structure which excellent electronic conductivity and mechanical properties.
Vol. 21 (2011), p. 1717 [23] C.A.Grimes, G.k.Mor.: TiO2 Nanotube Arrays Synthesis, Properties and Applications (Springer, Germany 2009)
Online since: August 2013
Authors: Feng He, Huan Li, Yi Ming Li, Hai Bo Wu
The composition and the physicochemical properties of COG are analyzed.
Dalei Wu from Guangdong University of Technology compared the emission factors of LPG taxis and gasoline taxis.
Physicochemical properties of NG, LPG, COG and gasoline are showed in Table II.
Safety Safety performance of vehicle fuel is related to fuel properties directly.
According to the COG properties and the gas cylinders arranged on the roof, its security is better than other alter fuel vehicles.
Online since: October 2011
Authors: Laxman B. Abhang, M. Hameedullah
RSM is a dynamic and foremost important tool of design of experiment (DOE), wherein the relationship between responses of a process with its input decision variable is mapped to achieve the objective of maximization or minimization of the response properties [5][6].
In addition the most effective factor and the order of importance of the controllable factors to the multi-performance characteristics in the turning process were determined.
Thus, by properly adjusting the control factors, we can improve work efficiency and produce quality parts.
Thus, RSM and grey relational analysis was employed to identify the optimum parameter settings of these significant factors.
Effect of turning parameters on grey relational grade (1, correspond low level factors, 2, corresponds middle level factors and 3 corresponds higher level factors) Analysis of variance Since the experimental design is factorial design, it is then possible to separate out the effect of each machining parameter at different levels.
Showing 14151 to 14160 of 26166 items