Search Options

Sort by:

Sort search results by

Publication Type:

Publication Type filter

Open access:

Publication Date:

Periodicals:

Periodicals filter

Search results

Online since: July 2014
Authors: P. Parthiban, C. Arumugam, T.G. Arul
Plant size is one of the key factors that influence the implementation of lean manufacturing.
The fuzzy measure makes monotonicity instead of additive property.
This study deals with the identification of critical factors that affect the implementation of lean manufacturing in Indian MSMEs and evaluating the performance of MSMEs with respect to these criteria.
Identification of factors The factors the affect the implementation of lean manufacturing was identified through extensive literature review and expert consultation.
This implies that E is the most consistent with the performance factors.
Online since: September 2024
Authors: Enkhtor Sukhbaatar, Munkhtsetseg Sambuu, Erdene-Ochir Ganbold, Rentsenmyadag Dashzeveg, Rene Tschaggelar, Narkhajid Ganbold, Baasanjargal Saruultuya, Bilguun-Od Norov, Munkhjin Ganbold, Altankhuu Bayarsaikhan
Dugarjav et al. [7] were focused on producing biochar products through pyrolysis process and established thermal energy quantification, though not yet defined production properties in level of molecular structure.
In other hand, characteristics, particularly, physicochemical properties of productions made from solid biomaterials can be dependent on individual pyrolysis reaction [10-12].
Moreover, many other factors such as combustion kinetics, kinetic rates of conversion processes, pyrolysis processing duration, elemental consistency of original materials could affect [10, 18-20] in effectiveness of the production and its further properties.
For example, at temperature range between 2000C and 3000C the torrefaction in which improvement of mechanical properties comes out [8].
Table 2: Heavy elemental analysis result of produced biochar Element content, % or ppm Al, % Ca, % S, % Fe, % Mg, % P, % Mn, ppm Ag, ppm Ba, ppm 1.80 1.89 0.64 1.16 0.37 0.53 23.18 <1 2.06 Proximate analysis result is one of key properties of coal like productions.
Online since: February 2014
Authors: Hong Jian Ni, Rui He Wang, Peng Wang, Zhi Na Li
Based on this idea, and combining classic solid mechanical stress-strain curves, Dahl described the asperity offset using the following differential equation [4] (2) where, represents Coulomb friction, N; is the shape parameters of stress-strain curve, in general, for brittle material and for soft plastic material, conventionally ; represents the relative sliding velocity between two surfaces, .
The force-displacement relationship for an individual asperity of borehole rock can be expressed as[5] (5) where, represents coefficient of friction,dimensionless; represents normal load, N; is composite shear modulus, , and are respectively shear modulus of ,drill-string and borehole rock, Mpa; , constant factor, .
Common parameters include [8,9]: vibration parameters(frequency , amplitude is ), velocity parameters(,,), material property parameters (, , , , ), surface parameters of borehole rock (,,,), friction coefficient , ,, tangential load .
Modeling the affect of a down-hole Vibrator, R.
[4] Dahl, P.R., Solid friction damping of mechanical vibrations, C.
Online since: December 2011
Authors: Yue Wang, Rui Zhang, Cheng Jian Sun
Research Analysis and Experiment Study on Flow Field of Hydrodynamic Coupling Rui Zhang 1, a, Chengjian Sun2, b and Yue Wang1,c 1 Faculty of Mechanical Engineering, Shenyang Aerospace University, Liaoning, 110136, China 2 AVIC Shenyang Aircraft Corporation LTD, Liaoning, 110013, China azhangrui790801@yahoo.com.cn Keywords: Hydrodynamic coupling, Gas-fluid two-phase flow, PIV test, CFD simulation Abstract.
Chin Lee[7-9] did the three-dimensional numerical simulation on flow field of coupling and made predictions on its properties.
By comparing a and b in Figure 3, it is obvious that the pressure is affected by charging ratio considerablly: charging ration is high when the pressure is higher, and charging ratio is low when the pressure is lower.
These results may predict correctly the performance of hydrodynamic coupling and the factors influencing the performance.
In order to reveal the complex internal structure of flow field and reflect the flow mechanism and its properties completely,further research on three-dimensional PIV test should be conducted.
Online since: July 2011
Authors: Sang Ryong Lee, Cheol Woo Park, Geun Sub Heo, Oh Hyun Kang, Choon Young Lee
Stress and Vibration Analysis of Motor Back Plate in HDD GeunSub Heo1, a, Oh-hyun Kang2, b, Cheol woo Park 3,c , Sang-Ryong Lee 4,d, Choon Young Lee 5,e 1,2,3,4,5School of Mechanical Engineering, Kyungpook National University, 1370 Sankyuk-Dong, Buk-Gu, Daegu, 702-701, South Korea a angriu@hotmail.com, b kang9822@gmail.com, cchwoopark@knu.ac.kr, d srlee@knu.ac.kr, e cylee@knu.ac.kr Keywords: Stress Analysis, Vibration Mode, Hard Disk Drive Abstract.
Steel plate properties Fig 3.
There is deformation on the outer curved surface, but the system is not affected (0.00088mm).
So, cost-effective design factors were chosen in order (Thickness of resource, Number of Beams, Width of Beams).
track-following micro actuator for hard disk drives using SOI wafer , Journal of Micromechanics and Microengineering Volume 11 no.1(2001) [3] Yang Jing, Jianbin Luo, Xiaoxing Yi, and Xin Gu : Design and evaluation of PZT thin-film micro-actuator for hard disk drives , Sensors and Actuators A: Physical Volume 116, Issue2, 15 October 2004, pp.329-335 [4] Stanley Kon, Kenn Oldham, Ryan Ruzick and Roberto Horowitz : Design and fabrication of a piezoelectric instrumented suspension for hard disk drives, Proc.of SPIE Vol. 6174 617430-10 [5] Dong-Woohn Kim, Jin-Koo Lee, No-Cheol Park, Young-Pil Park : Vibration Analysis of HDD Actuator with Equivalent Finite Element Model of VCM Coil, KSME International Journal, Vol.17 No.5, pp.679~690,2003 [6] Jae-Hyun Park, Jin-Gyoo Yoo, Yoon-Chul Rhim : The Numerical Simulation of the Airflow for Reducing Vibrations of an Actuator in HDDs, KSME 2003 autumn conference , pp.664-669 [7] DC Jile : The effect of compressive plastic deformation on the magnetic properties
Online since: October 2002
Authors: Teresa Marcelo, M. Helena Carvalho, Filipe Neves
Making use of smaller specimens [2] and geometries easier to machine than the usual threaded end specimens for mechanical testing or Young´s modulus (E) determinations is therefore atractive.
The resulting heat affected surface layers were grounded off with F1000 followed by F1200 SiC paper.
Calculation of E used the following equations: a) for rectangular bars E = 0.9465(mf2f/b)(L 3/t3)T1 (1) b) for circular cross section rods E = 1.6067(L 3/D 4)(mf2f)T1' (2) m, L = mass and length of the bar or rod , mm b, t and D =cross section dimensions of the bar and rod respectively, mm ff = fundamental resonant frequency of bar or rod in flexure, Hz T1 and T1' = correction factors to account for finite thickness/diameter, Poisson's ratio (µ) etc
[5] Materials Properties Handbook -Titanium Alloys, ASM Intern., Materials Park (1994), p. 1011
[6] Properties of SiC / SIKA and ESK leaflets
Online since: May 2014
Authors: Ernst Kozeschnik, M.R. Ahmadi, L. Whitmore, E. Povoden-Karadeniz, M. Stockinger, A. Falahati
The calculated final yield strength evolution is consistent with experimental results. 1 Introduction Engine performance in aerospace and power generation improves with increasing operation temperature, thus emphasizing the importance of understanding materials with good mechanical properties at high temperatures.
Inconel 718 is a nickel based superalloy, which is widely used in aerospace and gas turbine engine applications because of superior high temperature mechanical properties [2] up to 650°C.
A general approximation for superposition of different weak or strong strengthening mechanisms i was proposed by Ardell [10] to calculate the yield strength increase due to the different strengthening mechanisms with , (7) where M is the Taylor factor for converting shear stress to yield strength (M ~ 2.6) [14]. 4 Results and discussion The formation of γ' precipitates during aging produces the major effect on the final yield strength in 718Plus.
Chaturvedi, Effect of heat input on heat affected zone cracking in laser welded ATI Allvac 718Plus superalloy, Mater.
Online since: October 2010
Authors: Y. Zhang, Rong Di Han, Hui Wang, Q.W. Yao
But there are still some problems about dry cutting Nickel-based superalloy, one of them is the high temperature in cutting zone which negatively affects tool life.
Chemical composition of the material is given in Table 2 and the physical and mechanical properties of GH4169 are shown in Table 3, respectively.
Table 2 Chemical components of the materials used(Wt)% Ni Cr Nb Mo Ti C Al Si Mn 51.75 17.00 5.11 2.93 1.04 0.042 0.41 0.21 0.03 Table 3 Physical and mechanical properties of the materials used Yield strength σs(MPa) Tensile strength σb (MPa) Elongation δ(%) Cross-section contraction ratio φ(%) Hardness HBS 1260 1430 24 40 390 Experimental system.
The cutting experimental study was proposed in single-factor method in turning of C45 steel The cutting force is measured by Kislter 9257A dynamometer and Charge Amplifier 5007.
Online since: November 2013
Authors: Min Yu, Zhen Dong Dai, Jie Ru, Qing Song He, Bao Lei Wang
They have proton conductivity, thermochemical stability and praiseworthy mechanical strength [6].
Jung et al. [11] fabricated IPMCs based on graphene reinforced Nafion polyelectrolyte membrane, and then investigated the electro-chemo-mechanical properties and actuation performances.
It can be clearly observed that an increase in SSMA content in the polyelectrolyte membrane leads to a dramatical increase in its IEC value because of the increase in density of functional groups: -COOH and –SO3H with strong ionic properties.
According to vehicle mechanisms and Grotthus‘hopping’, water uptake ratio is also an important factor that affects the ionic transportation in polyelectrolyte membranes and the resulting IPMCs [17].
Strategic Planning of Mechanical Engineering Discipline [M] (2011-2020) (in Chinese).
Online since: May 2013
Authors: Xing Chun Wei, Yu Lin Tang, Tao Chen
The extraction of fault feature is correct or not will directly affect the results of fault diagnosis. [1] Proposed empirical mode decomposition (EMD) method, which the method for adaptive to nonlinear and non-stationary signal decomposition, decomposition the result that come out with clear physical meaning etc.
(4) The for scale factor.
For the index distribution has much important properties such as time, frequency true edge, time shift invariance, frequency shift invariance and scale invariance, etc.
[4] Yude Jie,Chengjun sheng,Yang Yu.Mechanical fault diaynosis method of Hibert-Huang transformation[M].Beijing:Social Sciences Publishing House.2006
Mechanical Systems and Signal Processing, 2001, 15(4):697-705
Showing 23801 to 23810 of 26166 items