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Online since: February 2016
Authors: Jan Řehoř, Jaroslava Fulemová, Katarina Monkova, Peter Monka
To demonstrate the explicitness, that a full HSC machining process is considered, it is necessary to monitor the series of factors.
In particular, the process of chip formation, cutting forces, cutting temperature, vibration, tool life and surface finish quality in relation to the method of machining, machined material and its properties.
The know-how all of the factors such as: chip formation, actions that go along with the process, force and power (thermal) load and other, enables to take advantage of HSC machining.
It also proves that the influence of the cutting edge geometry and its properties markedly affect the HSC machining effects.
The study of this surface layer properties can be next topic of the experimental research.
Online since: January 2013
Authors: Jing Guo, Hong Zhang, Yu Mei Gong, Yu Yan Zhang, Qian He Chen
In addition, the thermal property of composite fibers is steady.
In order to analyze the mechanical properties of composite fibers, the fibre tensile strength tester was used.
Fig.1 lgτ-lgγ curve of spinning solution Characterization and analysis of spinning process and composite fibers Table.1 shows the best combination of composite fiber strength is A1B1C3D4E2; primary and secondary factors are ACDBE orderly.
The mechanical properties are good and there are no skin-core structures when the concentration and temperature of coagulation bath are comparatively lower.
In addition, the thermal property of composite fibers is steady.
Online since: September 2011
Authors: Yu Can Fu, Wen Guo Huo, Hou Jun Qi, Jiu Hua Xu
The results show that surface quality maintain better level during a long period, the grinding affected zone was small(≤15μm), zirconia alumina belt has excellent performance than SiC belt during dry grinding Ti6Al4V alloy.
Introduction Titanium alloys are known as difficult-to-machine materials, especially at dry machining, due to their several inherent properties[1-3].
During grinding using abrasive wheels, which has been one of the most popular processes for titanium alloys, short wheel life and severe surface burn of ground workpiece are the most important among the factors impairing their grindability.
Cross-section micro texture images of grinding surface are shown in Fig.4a, about 15μm heat affected zone can be observed on the cross-section of ground surface, no distinctly structure change on the plane-section of ground surface, in Fig.7b.
Wallbank: Proceedings of the Institution of Mechanical Engineers Vol.204, (1990), p.53 [8] D.A.
Online since: July 2013
Authors: Zhi Wei Jiao, You Chen Zhang, Peng Zhao, Yue Xing Liu, Wei Min Yang
Finite Element Analysis for Mechanical Properties of a New Section Contour Tire Zhiwei Jiao1,2,a, Peng Zhao1,2,b, Yuexing Liu1,2,c, Youchen Zhang1,2,d*, and Weimin Yang1,2,e 1,2College of Mechanical And Electrical Engineering,Beijing University of Chemical Technology Beijing 100029, China; 1,2National Engineering Laboratory for Tire Design and Manufacture, Weihai, 264200,China ajiaozw@126.com, bzealp@126.com, clyx912@126.com, dzhangyc@mail.buct.edu.cn, eyangwm@mail.buct.edu.cn Keywords: Tire; Triangle balance contour; Contact; Finite element Abstract.
Tire’s performances directly affect the steering stability, riding comfort and braking (driving) performance of the car[1].
A triangle balance contour tire model was established based on the exsting 255/30R22 radial tire and the related mechanical properties were analysed by using ABAQUS software.
As is known to all, the friction coefficient between tire and road is influenced by many factors.
And the steering performance is affected by the cornering performance significantly.
Online since: August 2010
Authors: Lee Ku Kwac, Hong Gun Kim
In addition, straightness error of spindle, thermal expansion error of mechanical structure is analyzed to detect movement error property in ultra-precision machining.
It can be confirmed that nonlinear characteristics of a system is dominated not by mechanical factors but by the properties of piezoelectric actuator and hysteresis due to electrical nonlinear characteristics.
It occurs because of hysteresis due to the properties of piezoelectric actuator and the operating characteristics of electrical/mechanical control system and it is considered that in low frequency input signal, nonlinear characteristics were dominant due to hysteresis phenomenon however, as the frequency increased the nonlinear characteristics due to the operating characteristics of the control system increased.
Consequently, to compensate for all the input condition of the nonlinear characteristics of piezoelectric actuator, we have to take into account, separately, for the hysteresis phenomenon due to the properties of matter and the nonlinear characteristics due to operating characteristics.
Specific orbit can hysteresis of piezoelectric actuator affect the displacement and the output voltage of inverse-hysteresis model can be produced when critical point is put into input.
Online since: August 2021
Authors: Alexander V. Shaparev
In addition to layers high adhesion strength, a number of requirements are imposed on bimetallic brass-steel-brass strips in terms of dimensional accuracy, mechanical properties and microstructure [6].
Relative reduction during cladding affects bimetal layers adhesion strength, character of microstructure, the size of recrystallized grains, strip mechanical properties, and dimensional accuracy [7].
To achieve required stretching properties of bimetallic strips, optimum deformation degree must be in the range 0.45...0.60.
Large values ​​of joint deformation degree lead to excessive grain refinement after recrystallization process and increase material mechanical properties anisotropy, while lower values ​​contribute to excessive growth of ferrite grains during annealing and surface deterioration after stamping [8].
The factors were varied in the ranges: T0 = 550...900°C; HpH=2,0…4,0.
Online since: December 2006
Authors: Jian Feng Li, Dong Lu, Jie Sun, Bo Xin
Uneven distribution of the residual stress is the main factor causing the distortion of a workpiece.
Clamping stress coupling with the residual stress inside the part induces different stress distribution, which affects components' machining distortion and service life.
Uneven distribution of the residual stress is the main factor causing components' machining distortion.
Clamping scheme is one of the factors that effect the redistribution of the residual stress.
A constant static coefficient of friction 0.3 was used to establish contact properties at the interfaces.
Online since: July 2007
Authors: Fabrizio Quadrini, Loredana Santo, Erica Anna Squeo
This is principally due to the scatter in mechanical material properties, to the surface defects and lubrication conditions.
Every sheet forming process should be optimized on the basis of the real mechanical and formability properties of the provided materials.
If a not destructive, fast and easy method was present, it would be possible to acquire mechanical properties of metal sheets in real time and to set accurately forming processes.
This occurrence is typical of commercial supplies in which nominal properties may differ significantly from real properties.
This is the reason to adopt an on-line control to evaluate the effective sheet mechanical properties and to avoid unexpected problems during forming.
Online since: August 2009
Authors: Yong Wang, Yu Hua Chen, Zheng Fang Wang
The temperature field and the thermal cycle of weld joint are all important factors affecting microstructure and performance of weld joint.
It is necessary to research thermal cycle in order to obtain good microstructure, mechanical property and avoid HIC.
�umerical model of in-service welding The numerical model of in-service welding was build and the thermal physical properties of the natural gas varying with temperature were considered too.
The thermal physical properties of CH4 are used as thermal physical properties of natural gas, for the content of CH4 in natural gas is over than 90%.
The material of pipe is X70 pipeline steel and its thermal physical properties varying with temperature are also considered.
Online since: July 2019
Authors: Sutikno Sutikno, Andri Andri
With high tensile strength mechanical properties with low elongation and high impact toughness [2].
The mechanical properties of the steel are closely related to the microstructure of the steel, which is obtained after the heating treatment.
Effect of temperature and strain rate on mechanical properties of T91 material tested using lead bismuth eutectid solution.
Tensile Strength and Elongation Test Mechanical properties of material can be known from tensile testing.
[4] Jenan Mohammed Nagie, “The Effect of cooling rate on mechanical properties of carbon steel (St 35)” Engineering Sciences (2014), Vol.07, No. 01, pp.109-118
Showing 7931 to 7940 of 25925 items