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Online since: January 2006
Authors: Michael Josef Zehetbauer, Anna Dubravina, Erhard Schafler, Bernhard Mingler, Hans Peter Karnthaler
The onset of the deformation stages IV and V is strongly affected by the hydrostatic pressure i.e. shifted to higher values of stress and strain with increasing pressure.
So it is important to investigate the effect of the pressure conditions during the deformation on the microstructure and mechanical quantities.
Mk is the Taylor factor for torsion which has been taken as Mk = 1.65 for texture free fcc metals used in this paper.
To get an idea how the recovery process is affected by varying pressure and strain, the measurements of the long range internal stresses are very helpful (Fig. 3).
Schafler, Modelling Mechanical Properties of SPD Materials during and after Severe Plastic Deformation, Proc.
Online since: February 2012
Authors: Damien Meresse, Michel Watremez, Laurent Dubar, Souad Harmand
The heat conduction in the contact is dependent on several factors as the material roughness, the asperities shape and size...
This is fixed with a cement paste providing thermal properties close to resin one so as to limit heat flow perturbation induced by the hole.
Their thermal properties (Table 1) can be considered constant on the studied temperature range 20-400�C.
The resin properties have been measured for different temperature values (20, 120, 250 and 400�C) and no significant variations have been observed (<5%)[7].
As the rheological properties of the phenolic material is affected by the temperature, this could induce larger contact zones at microscopic level and then makes easier the conductive transfers between the two parts.
Online since: September 2020
Authors: Elizaveta Lotoshnikova, Khungiaonos Yavruyan, Vladimir Kotlyar, Evgeny Gaishun
Their ceramic properties and results of the raw materials’ selection are given, including: screenings - 60-65%; siliceous clay - 20-30% coal sludge - 10-15%, on the basis of which it is possible to obtain the products with low cost and high strength for the load-bearing wall structures.
The main factors affecting the calcined samples’ properties are the degree of grinding screenings and the firing temperature.
The mechanical bending strength of the samples in the dry state reaches 2-2.5 MPa, which is also sufficient for trouble-free passage of all technological operations.
However, the ceramic material itself is characterized by the increased density (more than 1800 kg/m3), which significantly affects the thermal conductivity of the products themselves and the thermal conductivity of a masonry.
Teryokhina, Municipal waste management as an important factor in the sustainable development of the metropolis. 1 (2018) 115-118
Online since: June 2023
Authors: Fauzan Djamaluddin, Ilyas Renreng, Muhammad Ma’ruf
Lightweight, robust, and anti-rust properties of aluminium foam might be a solution for reducing the effect of traffic accidents and for minimum fuel consumption.
The most common material used in the production of crash boxes is aluminum which has the properties of being lightweight, corrosion resistant, and having high ductility value [3].
Hussain also investigated the energy absorption properties of glass fiber reinforced plastics foam filled [9].
METHODS Peak collision force (Fmax), specific energy absorption (SEA), and collision force efficiency are all factors for crashworthiness.
This data will be used as material properties in Abaqus so that the results to be obtained are close to the real value.
Online since: December 2012
Authors: Jian Ping Yang, Li Qiang Yang, Ri Yi Lin
(1) The minimum wall thickness According to the stress calculation standard[4] of thermal power plant's pipeline, When the external diameter has been determined, the minimum wall thickness show in Eq.1 (1) Where is design pressure, regard it as MPa; is the external diameter, mm; is the allowable stress, MPa; is the correct factor affected by temperature, under 480°C, ; is allowable stress's correct factor, Seamless steel pipe's is 1.0; is Additional thickness affected by corrosion, attrition and mechanical strength, where
The heat dissipating capacity and the oil temperature distribution are affected by many factors, such as quantity of steam, boiler's outlet parameters, environment condition and pipeline's condition.
Strictly, all these factors are changed with the time, the pipeline are in unstable state of thermodynamics. we calculate the temperature distribution in stable state of thermodynamics and hydraulics for convenience.
(4) Where is two-phase’s true density, kg/m3; is two-phase flow’s fictional factor, is two-phase flow’s mass flow-rate, kg/s;is inner diameter, m; is mixed flow velocity, , m/s; & is gas and liquid’s apparent velocity; is included angle in pipe and horizontal,°.
Calculation of Fluid Thermophysical Property.
Online since: November 2015
Authors: E. Sidhuvilaji, B. Prabu, A.V. Raviprakash, Duraikannou Peroumal
., Raviprakash A.V.4d 1 Research scholar, Dept. of Mechanical Engineering, JNTU, Hyderabad – 500085, India. 2,3,4 Dept. of Mechanical Engineering, Pondicherry Engineering College, Puducherry 605014, India.
One of the important conclusions arrived was that centrally located dent affects the shear loading capacity more than the dents located near edges.
Hai et al.[6] in their work, proposed a method to determine global reliability index and sensitivity expression of reliability index of the plate structure with a local dent based on ultimate strength reduction factor.
Results indicate that with increase in dent depth, the five types of dents affect the ultimate strength of the plate in different trends.
The dimensions and material properties of the structural steel plate [7] [9][10] are Length (a) = 500 mm, Width (b) = 500 mm, Thickness (t) = 4, 6, 8, 10, 12, 14, 16, 18 and 20 mm, Young’s modulus (E) = 2.058 x 105 N/mm2, Yield stress (σy) = 313.6 N/mm2, Poisson’s ratio (ν) = 0.3, Mass density (r) = 7800 kg/m3, Zero strain hardening effect is assumed.
Online since: October 2004
Authors: Liang Chi Zhang
The challenge is that in many surfacing processes, in addition to mechanical loading, material removal is often affected by other factors, such as chemical reaction when polishing/grinding fluid is applied, and electric, magnetic and electronic effects when a physical field is used to assist the processing of a silicon component.
In addition, the compounds formed at different Pmax clearly have different mechanical properties (e.g., varied elastic moduli).
The gradient of the loading curve in water becomes higher, indicating that the mechanical properties of silicon have been changed due to the existence of water in the first indentation cycle.
The above constitutive modelling is preliminary, because it does not include quite a number of influential factors such as loading rate, chemical reaction and anisotropy.
In-depth studies integrating with these production factors will be of significant value.
Online since: January 2013
Authors: Shuang Hui Hao, Zhi Bo Guo, Zhi Tao Guo, Fang Song
Finally, the execution unit of the mechanical transmission mechanism drives the mechanical system to run.
Supposed that the synthesize force of the execution units is , the driven force of each mechanical drive axis is (Fx,Fy,Fz).
In the range, other factors to affect the feed rate will be considered.
Its maximum interpolation error is better than 3.5nm, which shows that not only the geometric properties of the curve interpolation must be considered but also the actual trajectory characteristic of interpolations between points from the servo characteristic.
Online since: September 2014
Authors: Ya Li Wang
Apply to all kinds of soil environment, especially suitable for the mechanical properties of coating resistance barrier properties, soil stress and high demanding environment.
Firstly, many factors such as capital and knowledge level, expensive anticorrosion coating application by certain restrictions, good comprehensive performance, low cost, easy to use, easy to promote the new material and new process will be popular, be badly in need of strengthening the research work in this area.
Conclusion Different anticorrosion properties of the coating application determines the requirements, the most basic performance test was conducted in the process of coating production, because of the short test cannot predict pipeline under various environment long-term use of all kinds of problems, and different types of coating thickness difference is bigger also, coating protection and failure is affected by many factors, and the test method and results of them, there are differences of historical experience is very valuable evidence materials, therefore, should be very seriously.
Online since: October 2010
Authors: Kang Deng, Zuo Sheng Lei, Xiao Li Jin, Zhong Ming Ren
The effect of different continuous casting parameters on temperature fluctuation were analyzed, and the temperature fluctuation was considered to be a key factor to the formation of oscillation marks.
The initial solidified shell was affected by two aspects: force imposed on it[3] and heat transfer around it[4,5].
Therefore, temperature fluctuation may be a key factor to the formation of oscillation marks.
From the liquid surface to the 5mm below, the ITF kept changing all the while during mold oscillation, and the solidification in this area was strongly influenced by temperature fluctuation, resulting in the un-uniform of billet thickness and differences in mechanical properties, even the formation of oscillation marks or other surface defects.
Different continuous casting parameters were analyzed, temperature fluctuation maybe a key factor to the formation of oscillation marks.
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