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Online since: May 2011
Authors: Xiang Dong Zhang, Meng Wang, Xue Lei Zhang
According to survey data, the soil properties and the thickness of each layer have little change, in order to facilitate modeling, without the circumstances of affecting the accuracy, the soil levels have been taken as planar, model has been shown in Figure 2.
Determination of Calculation Correction Factor.
Conclusion As very different nature of the soft soil, there are different factors under different projects, the model presented in this paper still need to be tested by engineering practice and the model parameters need to be appropriately amended according to the different soil of different areas in different engineering application.
(2) Riprap embankment construction should be compacted as necessary, so that there is relative density of stone to reduce uneven settlement over time, so as not to inconvenience of follow-up construction and affecting the quality of the road
References [1] Xiang Xianchao, Hou Jianshu, Zhu Changqi: Consolidation Deformation Properties of Silt Roadbed under Effect of Tide[J].
Online since: November 2003
Authors: Bo Young Hur, Kwan-Ho Song, Sang Youl Kim
In this study, it was investigated to determine mechanical properties of aluminum foam prepared through a batch process.
While changing the amount of Si and relative density, mechanical properties were investigated by compression test.
As a result, the manufacturing process has been greatly improved, resulting in improvement of Al foam's mechanical and functional properties.
Gui et al. studied Al foam's compression and vibration properties.
In this study on investigation of Al foam's properties, the following results were obtained.
Online since: July 2011
Authors: Xue Yuan Yan, Ai Qi, Wei Lin, Su Guo Wang
Construction and control principle of the new combined steel lead damper (NCSLD) were introduced, pseudo-static tests of NCSLD which would be used in the subsequent shaking table tests were carried out for the study of its mechanical properties using electro-hydraulic servo press-shear machine.
The damper is composed of stainless steel plate and lead, it has characteristics of simple constitution, convenient manufacture, stable hysteretic properties and low yield point, it has broad prospect of engineering application.
Mechanical property test results of NCSLD performed on electro-hydraulic servo press-shear machine indicate that both the two directions of NCSLD are of good energy dissipation capability and NCSLD has full hysteresis loops which take on bilinearity.
Determine n, hi, mi, andof the structure, where n is the number of storeys; hi is the height of i-th storey; mi is the mass of i-th storey; is the earthquake affecting coefficient curve of the structure. 2.
Geometric parameters and mechanical parameters of the used dampers are shown in table 1.
Online since: October 2011
Authors: Aniruddha Ghosh
A heat flow model needs to be considered for the factors mainly variable thermal properties, temperatures of phase transformation, the magnitude of heat and characteristics of heat distribution, plate geometry, convection and surface depression in the weld pool [7].
Many researchers consider constant thermo mechanical properties to find out temperature distribution on welded plates.
The mechanical properties of the joints and value of ferrite share test have been done.
Analysis of welding heat input influence on mechanical properties of test joints has been done using heat input from 2.5 to 4.0 kJ/mm.
Experimental Methods The experiments were conducted as per the design matrix randomly to avoid errors due to noise factors.
Online since: August 2024
Authors: Abulmaali M.Y. Taher, Mohamed Shukuka
Generally, there are four main factors which have considerable effect on the wear resistance of 316 stainless steels and steels in general which are heat treatment, alloying additions, influence of carbon content, and effects of carbides.
Other factors such as plastic deformation, grain size, recrystallization temperature, hardness, and strain rate also affect the wear of steels.
Sharef, Yousef Arebi, 2020, “Effect of Stand -Off Distance on the Mechanical Properties of TIG Butt Joints of 316 Stainless Steel”, key Engineering Materials, V833, pp 59- 65
[13] Deming Xu, Xiangliang Wan, Jianxin Yu, Guang Xu and Guangqiang Li, 2018, “Effect of Cold Deformation on Microstructures and Mechanical Properties of Austenitic Stainless Steel” , Metals, 8, 522, pp. 2-14
Abbas Najafizadeh, Ahmed Kemanpur, Fanoosh Forouzan, 2010, “ The Effect of Cold Rolling Regime on Microstructure and Mechanical Properties of AISI 304L Stainless Steel”, Journal of Materials Processing Technology.
Online since: August 2013
Authors: Zi Yu Zhao, Su Zhi Zhang, Jin Guo Yang
It not only seriously affect the wear of diamond grinding wheel and service life, but also affect the stone surface quality and processing efficiency.
D.Shouji[6] etc. analyzed mechanical properties of rock deformation mechanism and failure criterion, constitutive relation of high-temperature by the point of view of temperature-stress.
The thermal stress is an important factor to lead to rock damage.
When the temperature is higher than 500℃, the sharp decline in the overall physical and mechanical properties lead to the grinding force falling largely , which reduce the loss of the grinding wheel obviously.
Our study shows that the main factor which influences the grinding force is temperature.
Online since: April 2015
Authors: Bing Bing Chen, Ya Ping Niu
The crack initiation was found at the pit along the ridge lines outside the opening area, which was induced by mechanical damage, see Fig.3b.
The micro-hardness around the crack in the shell In order to know the material property around the crack, micro-hardness distribute was measured on the specimen block surface.
Those burns defects would seriously affect the quality and the safety during working.
Pits caused by mechanical injury are also the defects that always be ignored by manufactory, which is one of the important factors affect the fatigue life of accumulator.
(3) The defects as mechanical damage, electric arc flash burn etc. introduced by machining and testing process are one of the important factors that affects the fatigue life of the accumulator.
Online since: September 2011
Authors: Zhi Lun Gao, Guo Feng Wang, Long Chen, Ming Qiu
The results indicate that the fiber woven with PTFE effects the friction and wear characteristics of bearing, the tribological properties of bearing with Kevlar/PTFE fiber woven liner is the best in the three kinds of bearing.
It can be widely used in aerospace, aviation, agriculture, textiles, transportation and many other fields of mechanical equipment.
Thus, the tribological properties of lubricating spherical plain bearing are the key factors affecting its life and performance.
Table1 The material properties of different spherical plain bearings Numbering Material of inner ring Material of outer ring Material of bearing liner I GCr15 GCr15 Nomex/PTFE fiber II GCr15 GCr15 Kevlar/PTFE fiber III GCr15 GCr15 glass/PTFE fiber Test apparatus.
The type of fiber mixed with PTFE fiber effects the friction and wear characteristics of bearing, the bearing liner mixed with Kevler/PTFE showing the best tribological properties in the three kinds of bearing liners.
Online since: January 2013
Authors: Ivana Turekova, Jozef Harangozo, Zuzana Turnova, Karol Balog
Flammability of polymer materials depends first of all on chemical structure of polymer and physical factors affecting the burning.
This means that the coating after foam generation prevents the approach of air to insulation and so it retards the speed of flame propagation and at the same time it also reduces the surface temperature of plastics what is in case of softened PVC approximately below 160 - 180 °C. [2] The foam formed on cable systems must correspond to desired purpose [2]: - must be formed at lowest possible temperatures, - must resist as long as possible to mechanical acting of the flame, - must exert greatest possible elasticity, - must be strong, viscous and tenacious at lower thickness, - must allow escape of gases generated by thermal degradation of insulation under the coating, - must preserve the cable sheath at melt efflux on the coat surface, - must resists to defined mechanical loading without damage, - must attain desired humidity.
The foam has often the expansion factor even 1:50, i. e. from 1 mm thick coating the insulating foam 50 mm in thickness is formed. [3] Measurement of heat flux by radiation panel This instrument was constructed for experimental tests on the basis of experience gained from numerous professional consultations and comparison of existing methods with the aim to determine the initiation of material ignition in dependence of the heat flux rate.
However, PVC as well as the other polymer materials are subjected to degradation within their life cycle, which is caused by physical, chemical and biologic effects which exert a lasting influence upon their properties. [7] Ageing of insulation layers of cables significantly affects also their fire resistance, as proved also by the test results.
Online since: December 2023
Authors: Hojjatollah Soleimani, Leila Khodapanah, Maziyar Sabet, Surajudden Sikiru, Hassan Soleimani
Characterizing anisotropic dielectric properties is crucial.
The external magnetic field can influence Magnetic NPs' magnetic properties.
This means that the substance can move more freely within the rock, potentially affecting its transport properties.
The ferromagnetic nanoparticles in the nanofluid can also affect the magnetic properties of the sandstone.
The results of the study demonstrate that the hybrid nanofluid composed of BaTiO3/MnO exhibits the highest recovery factors.
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