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Online since: August 2012
Authors: Bin Jiang, Dan Hua Xia, Pei Yi Zhao, Ji Guang Song, Song Tao Wang
In order to research the influence property of pre-tightening force, centrifugal force and dynamic cutting force on cutter components, and reveal safety recession of the cutter components, this paper makes load analysis for high speed milling cutter, studies cutter deformation, joint surface crushing, ductile fracture and other damage characteristics, gets the safety recession order of cutter components by safety margin theory.
(a) Load analysis of screw (b) Load analysis of blade (c) Load analysis of body Fig. 2 Loads analysis of milling cutter Safety Characteristics Analysis of High Speed Milling Cutter Analyze the deformation of components, crushing of combining surface, ductile fracture and other macroscopic properties.
Among them, tangential force affects obviously knifepoint, radial force is a small effect on stress and deformation, axial force is the main factors of blade positioning the stress and deformation.
Tangential component of cutting force has a significant effect on knifepoint, the radial component of cutting force has lesser effect on the stress and deformation of cutter, and the axial component of cutting force is the major factor of the stress and deformation of cutter body location surface.
Stroh: Journal of the Brazilian Society of Mechanical Sciences and Engineering Vol. 29 (2007), pp.313
Online since: March 2015
Authors: Dorel Banabic, Lucian Lazarescu, Ioan Nicodim
In the deep drawing process, the blank-holding force (BHF) is an important process parameter affecting the energy consumption and the successful production of parts.
In the deep-drawing process, there are many factors that affect DF and wall thickness distribution, such as the clearance between die and punch, the tool geometry, lubrication conditions, and the BHF.
Table 1 shows the mechanical parameters of the investigated material [7].
Table 1: Mechanical properties of the AA6016-T4 aluminum alloy (thickness: 1.0 mm).
Online since: March 2016
Authors: Erman Taer, Rusli Daik, Gurumurthy Hegde, Mohd Suleman, Baharudin Yatim, Ramli Omar, Mohamad Redwani Mohd Jasni, Nur Hamizah Basri, Mohamad Deraman, Sepideh Soltaninejad, Najah Syahirah Mohd Nor, Awitdrus Awitdrus, Rakhmawati Farma, Mohd Amir Radhi Othman, Abdul Aziz Astimar
A comprehensive review of the historical background, properties, and principles of supercapacitors is available elsewhere [1].
This paper reviews the studies using certain selected biomass precursors, mainly oil palm empty fruit bunches, to produce supercapacitor electrodes, and adopting different experimental approaches to optimize the factors affecting the specific energy and specific power of supercapacitors.
Dolah, Physical and electrochemical properties of supercapacitor electrodes derived from carbon nanotube and biomass carbon, Int.
Nor, Physical and electrochemical properties of supercapacitor composite electrodes prepared from biomass carbon and carbon from green petroleum coke, AIP Conf.
Hollenkamp, Carbon properties and their role in supercapacitors, J.
Online since: September 2013
Authors: Xin Chen, Xiao Cui Wu, Jian Feng Di
Its compounds have unique optical, electrical and magnetic properties.
Mechanical properties of filament According to the standard of test method for tensile properties of synthetic filament (GB/T14344-2003), we tested the mechanical properties of the filaments that we developed.
But the deviation of titer of the PA-6/ZnO /CeO2 was relatively bigger which may affect the subsequent processes.
Characteristics of solar ultraviolet radiation and its influencing factors.
Examination of the absorption properties of various fibres in relation to UV radiation.
Online since: August 2016
Authors: Jozef Bílik, Daynier Rolando Delgado Sobrino, Miroslav Košík
They are dependent on many production conditions as part and moulding tool design, material structure properties and injection parameters.
Factors affecting plastic part warpage are many, such as material selection, part and mould design, processing parameters and others [1, 2, 3].
In order to achieve the required operational properties of the mirror, the determined friction must be created in the interface between sphere joint and the toggle.
The creation of the gas channel in these thin-walled areas can compromise the toggle mechanical properties and is adverse.
Hwei-Yen., Mechanical properties of gas-assisted injection moulded PS, PP and Nylon parts, Polymer. vol. 40, no. 11, (1999) pp. 2949–2959, ISSN 0032-3861, DOI: 10.1016/S0032-3861(98)00525-4 [29] Ch.
Online since: December 2012
Authors: Chang Rong Yao, Dong Liang, Sai Zhi Liu
The design of long-span bridge in mountainous will directly affect the quality of the whole project, so structural type selection for long-span bridges in mountain area has important practical significance. 2 The general structure types of bridge in mountain area The types of highway and railway bridges in mountains not only have a great influence on bridge design, construction and cost, but also affect the quality directly, so the structural type of mountainous bridges should be reasonably selected according to the specific circumstance of different, bridge site, mechanical properties and economy.
The structure has the merits of both continuous beam and continuous rigid frame bridge, abandons their disadvantage of both, then it has the advantages of their own in the structure of the force, the use of properties.
Several reasons may restrict the span of steel arch bridge (including steel girder bridge), such as the strength, toughness, shock resistance, weldability, other mechanical character and heavy plate rolling skill of steel plate for bridge (≤50mm) , these factors contradict each other.
The construction of these above two suspension bridges indicate that suspension bridge can be used in the mountain area, as long as the program is properly, the entire cost of the project is not necessarily higher. 7 Conclusions The design of highway and railway bridges in mountain area is influenced by a number of factors, and it is a complex problem.
According to all these factors, designer should compare a lot programs, and select the best program to ensure the coordination with the natural environment.
Online since: November 2011
Authors: Babankumar S. Bansod, Kunal Bansal, Priyank V. Hirani, Ritula Thakur
Introduction Today, in addition to yield, boundary and field attribute maps, a wide array of new electronic, mechanical and chemical sensors is being developed to measure and map many soil and plant properties on field-scale basis.
Soil Electrical Conductivity (EC), a measurement of how much electrical current soil can conduct, integrates many soil properties affecting crop productivity [1].
The digital code has been written based upon the desired frequency (frequency can be changed using multiplication or division factors if required in conjunction with the basic inbuilt frequency) [4-5] which further governs the ac voltage, then through the DAC port of the MCU which converts this digital code into analog wave form i.e. ac sine wave, final desired output sine wave signal has been generated.
After having successfully tested the source and having known the range of resistance values over which it works well, the source can now be used to measure the resistance of soil having some background knowledge of the kind of soil and expected properties.
The data obtained can be geo-referenced by interfacing compact GPS module to MCU unit whose work in the ongoing project on sensors and instrumentation for soil properties is under progress.
Online since: November 2011
Authors: Da Wei He, Ji Gang Wang, Yong Sheng Wang, Hai Teng Wang, Yong Na Zhang, Ming Fu, Hong Peng Wu, Pan Zhou
Introduction Recently, polymer-based organic photovoltaic (OPV) cells began receiving increasing considerable attention because of their favorable properties, such as low cost, easy to manufacture, low specific weight and mechanical flexibility [1,2,3].
The solar cell performance depends critically on the material properties, processing conditions, morphological issues and device structure.
In this work, the structural properties of thin MEH-PPV: P3OT: graphene films were studied by XRD, the optical properties of these films were investigated by measuring the optical absorption spectrum and the photoluminescence spectrum.
It has been reported that the energy conversion efficiency of organic photovoltaic devices based on a conjugated polymer/methanofullerene blend is dramatically affected by donor and acceptor material and other manufacturing details, and molecular morphology also played a great role in fabricating the OPVs devices.
Above the 1 mg of MEH-PPV incorporating into P3OT: SPFGraphene BHJ film, there is a significant increase in the surface roughness, which will result in a lower photo generation rate, increased recombination rate, and reduced effective mobility, and these factors could have a deleterious effect on exciton generation and charge separation/transport in the active layer.
Online since: October 2023
Authors: Fabio Fruggiero, Francesco Mancusi, Vito Romaniello, Salvatore Martino, Alfredo Drago, Alfredo Lambiase
Experiments showed that when the capacitor is exposed to a temperature excursion between -55°C to +125°C, its capacitance properties are maintained.
These factors, even if in HASS stage, may alter useful life while considerably reduce, in a causal approach, reliability in field.
Failure is generally originated from a combination of factors, mainly over operative conditions, that can hardly be connected to early detectable effects.
Those can helpfully foretell conditional factor affecting useful remaining life.
Zhou, «Similarity assessment of mechanical parts based on integrated product information model,» J. of Comp. and Inf.
Online since: January 2005
Authors: J.S. Park, Do Hyang Kim, J.H. Kim, Myung Hyun Lee, Won Tae Kim
Introduction Considering the mechanical properties of the amorphous materials, amorphous particles or fibers can be an excellent candidate for the reinforcing phase in the ductile metal matrix composites [1, 2, 3].
While outstanding mechanical properties of amorphous materials have been recognized in many studies, the limited thermal stability often provided a significant obstacle for practicing the amorphous phase as reinforcing materials during casting process [4-6].
For the evaluation of the mechanical property, uniaxial compression tests were conducted using an Instron-type machine (Hounsfield H25KT) at room temperature with a strain rate of 4.0 x 10 -3 s-1.
Another important factor for the successful fabrication of the composite is a stable interface between the reinforcing phase and the matrix.
Lyman, Metals Handbook 8th Ed.: Properties and Selection of Metals, ASM, Ohio (1961) pp. 957
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