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Online since: November 2023
Authors: Joni Paananen, Juha Pyykkönen, Jari Larkiola, Joonas Ilmola, Oskari Seppälä
To produce high quality steel strips with desired mechanical properties, the Thermo-Mechanically Controlled Process (TMCP) must be managed.
The main benefit of the virtual rolling model is comprehensive simulation of the evolution of thermal, metallurgical and mechanical phenomena which increase understanding of the combined effect they have into the thermo-mechanical properties of steel strip.
Microstructure Module Understanding metallurgical phenomena in a steel strip during hot rolling is essential to understand the thermo-mechanical properties on a deep level, as well as to predict final product properties.
The idea of this equation is that when recrystallization progresses, the material mechanical properties revert to the undeformed state.
The main idea is to consider all boundary conditions affecting the steel strip in a hot strip rolling process.
Online since: July 2019
Authors: Nur Hidayati, Herry Purnama, Muhammad Mujiburohman, Hamid Hamid, Arnaldi Dwilaksita, Fara R. Zubaida
ABS, a mixture of co-polymer that has strong and durable properties, also possess a good set of temperature, electrical and mechanical properties as a thermoplastic polymer [11].
In addition, the conductivity and methanol permeability properties on sABS membrane have a correlation with IEC and DS, whereas absorption properties are less affected by sulphuric acid concentration and reaction time in the sulfonation process [9].
Thus, efforts to increase conductivity properties are needed.
However, excess water uptake may reduce the mechanical properties caused by the disassociation of membrane back bone.
The technique of blending polyelectrolyte resulted better properties than pure chitosan polyelectrolyte.
Online since: November 2011
Authors: Xiang Zhen Yan, Heng Lin Yang, Zhi Qian Xu, Zhong Lan Tian
It shows that the formula of this paper can meet the engineering commands; the axial load is significant to affect casing collapsing strength, and in the actual production process should be strictly controlled.
Influence Factor Anslysis The Influence of Diameter-Thickness Ration on Casing Collapsing Strength.
The diameter-thickness is larger, but the collapsing strength is smaller, which show that the main factor that affects the collapsing is relative thickness.
[7] Yang Jie and Peng Jianshe, “Mechanical model and analysis of casing bucking in horizontal wells” ,China Petroleum Machinery, vol. 24, pp. 43-46, December 1996
Al-Bokhitan “Support Vector Machines Framework for Predicting the PVT Properties of Crude-Oil Systems”, SPE Middle East Oil and Gas Show and Conference, Kingdom of Bahrain, pp.11-14, March, 2007.
Online since: April 2024
Authors: Martin Krystov, Stanislav Rehacek, David Citek, Adam Citek
Reinforcement is subject to corrosive processes, which are affected by several factors.
The most important factors include content of certain pollutants in the concrete (chloride ions, presence of acids and other aggressive media), humidity of the environment, filling the pore system of the concrete with water, cover of reinforcement and concrete carbonation depth.
The corrosion does not affect the change in cross-section.
This type of corrosion is the borderline in terms of negative impact on mechanical properties.
[5] Effect of corrosion on the properties of steel prestressing reinforcement, team of authors, Klokner Institute, CTU.
Online since: January 2013
Authors: Peng Peng Huang, Xi Zhou Xiao
The moving characteristic of materials is the basis of calculation of the load resistance during this process, and it is often based on materials deformation proposed analysis calculated mechanical model, and judged the magnitude and direction which generated by a variety of resistance, thereby determined the loads, it is as the basis of design and use of the machine.
It can achieve three-dimensional modeling and simulation, intuitive and accurately obtain the deformation characteristics and load spectrum of material - mechanical system.
Moreover, a larger friction factor is adopted to compensate for the error caused by the difference of spherical and irregular lumps. 2) Particles is assumed an inviscid unit body and squeeze destruction and bond are not occurred during loading. 3) Bucket inserts the materials at a constant speed
The angle between bucket bottom plate and the horizontal plane is about 3degrees, bucket bottom length 300mm and bucket width 300mm. 2) Material model: Rock materials, its material properties and contact properties are shown in Table 1 and Table 2.
The formation of dense core is the main factor for affecting the inserting resistance and this model can further study the factors that affect the existence of dense core
Online since: April 2012
Authors: Chuan Li, Yun Shui Xu, Qing Hua Yan, Shao Quan Zhang, Yan Chen, Xiao Ping Xu, Jiang Chun Xu, Ying Na Li, Guo Min Li
The conductivity γ represents the conductive properties of the material.
Conductivity will be affected by temperature and humidity, the conductivity of the silicone rubber is proportional to temperature and humidity.
The arc will increase the silicone rubber tube’s dielectric constant ε and dielectric loss factor tgδ, and then decline the electrical insulation property of the tube.
Conclusion The relative dielectric constant ε, the conductivity γ, and the dielectric loss factor tgδ of the silicone rubber tube is low when the tube works under frequency voltage.
[2] Yao-nan Liu and Changrang Qiu:Electrical insulation testing technology(Mechanical Industry Press, Beijing 1981) ,in Chinese
Online since: September 2020
Authors: Shah Rizal Kasim, Hasmaliza Mohamad, M.H.M. Marahat
Based on the XRD result, the Mg doping is affecting the stability of the phases presence and the crystal lattice creating a distortion due to the substitution of smaller Mg ion.
To further increase the biological properties of BCP, doping was introduced.
Through all advantages, HA also has suffered some disadvantages to be utilized for long-term biomedical application due its possess slow degradation rate [2] and low mechanical properties for load-bearing application [3].
From the graph, decreasing trend of HA shown was due to two factors which is the Mg substitution and influence of temperature as it increased from 800 oC to 1000 oC.
Aizawa, Zinc-substituted hydroxyapatite: A biomaterial with enhanced bioactivity and antibacterial properties, J.
Online since: April 2018
Authors: Paula Tudor, George Ipate, Mirela Dincă, Gheorghe Voicu
The way in which it rains is an important factor, affecting the infiltration process in the landfill final cover.
The lateral flow was constantly overestimated, whatever hydraulic properties entered, but have not noted any correlation between predicted and measured values of the percolation.
These findings suggest that the forecasts made by the HELP algorithm should utilize hydraulic properties valuesthat reflect as closely as the operating conditions of the soil layers.
Among the studied factors were included precipitation intensity, duration, the model and engineering properties of the landfill being performed about 100 different combinations of these parameters.
Conclusions The design of final coating of an urban landfill requires knowledge about both the slope geometry and hydraulic properties of the materials used in its construction, considering vertical hydraulic conductivity of each layer, and transmissivity along the slope.
Online since: June 2015
Authors: So Young Choi, Pyung Su Kim, Young Sik Kim, Jong Do Kim
Furthermore this material maintains good mechanical properties across a wide range of temperatures from ultra-low temperatures up to temperature approaching 500 °C.
Therefore, the purpose of this study is to develop an optimal welding method for INCOLOY 825 and STS316L special materials for use at low temperatures by deducing and controlling the welding governing factors and to evaluate the product reliability.
To that end, the authors identified the mechanical properties of the weldment of a cryogenic film material and the weldment of a flange attached onto bellows by measuring the tensile strength and hardness.
Here, we execute butt welding on 0.8 mm-thick STS316L and INCOLOY 825 material using plasma heat source to determine the optimal welding parameters of bellows by evaluating the mechanical properties and formability of the materials2).
Conclusion In this study, the mechanical properties and micro-structure of a bellows joint and a flange joint were analyzed for use as an expansion joint for LNG carriers, which used STS316L and INCOLOY 825.
Online since: January 2020
Authors: Vladimir Popov, Alexey V. Stolbovsky, Ruslan Falahutdinov
Ultrafine-grained materials obtained by various techniques of SPD demonstrate unusual mechanical behavior and a number of unique properties often not achievable in coarse-grained materials [4-6].
Valiev, Nanostructuring of metals by severe plastic deformation for advanced properties, Nature Mater, 3 (2004) 511-516
Horita Microstructure and mechanical properties of pure Cu processed by high-pressure torsion.
Effect of high-rate deformation on the structure, the properties, and the thermal stability of copper alloyed with chromium and zirconium.
Structure, thermal stability and properties of grain boundaries of submicrocrystalline Mo obtained by severe plastic deformation.
Showing 13071 to 13080 of 25943 items