Search Options

Sort by:

Sort search results by

Publication Type:

Publication Type filter

Open access:

Publication Date:

Periodicals:

Periodicals filter

Search results

Online since: May 2013
Authors: S. Benbelaid, B. Bezzazi, A. Bezazi
The stacking sequence of plies affects the overall stiffness and failure properties of the designed structure.
Modelling of laminate failure is often endeavoured on the mesoscale, where a laminate is considered to be consisting of homogeneous plies, each with orthotropic properties that depend on the fibre orientation.
Effect of stacking sequence is focused particularly on the 90° ply thickness which mostly affects the transverse cracks initiation and propagation. 2.
Baptiste Mechanical Engineering Publications, London (1991) [23] P.
Baptiste Mechanical Engineering Publications, London(1991) [34] O.
Online since: July 2016
Authors: S. Sharif, Azlan Mohd Zain, Z. Shayfull, R. Mohd Saad, S.M. Nasir
From all of these stages, cooling is the most significant stage that affects the productivity and the quality of the moulded parts [3].
Formula (10) shows that the cooling channels configuration does not directly affect the cooling time.
However, it affects the mould surface temperature, thus indirectly affect the cooling time.
Table 1 shows the material properties for coolant, mould inserts (cavity and core inserts) and plastic material.
Material Properties.
Online since: July 2022
Authors: Sergey Ragimov, Kostiantyn Ostapov, Yurii Senchykhin, Igor Kirichenko
This is probably due to the fact that ammonium phosphates saturate the top layer of wood and due to their inhibitory properties contain flares.
Due to their adhesive properties, gel-forming systems are firmly attached to the surface of the object, which is protected during firefighting, which significantly affects the rate of their fire-fighting capacity.
That is, the process of extinguishing such fires depends significantly on the human factor.
The aim of the work is to improve the efficiency of firefighting of various equipment in the undercarriage space of cars at subway stations due to the adhesive properties of gel-forming compositions.
[11] De-xu Du, Xu-hai Pan, Min HUA Experimental study on fire extinguishing properties of compound superfine powder.
Online since: March 2021
Authors: Bernard Viguier, Sophie Gouy, Bettina Camin, Alexander Epishin, Anton Chyrkin, Romain Saillard
Excellent service properties of these alloys at high temperatures are achieved by thorough optimization of the complex composition, where the number of alloying elements can reach 10 or more.
Concentrations of Al and Co are multiplied by a factor of 5, concentration of W by a factor of 10.
The values characterize how much the diffusivity of a given element is affected by other components.
First, it is needed for alloy design oriented on the development of alloys with low diffusion mobility which provides high service properties of superalloys at elevated temperatures.
Golubovskiy, Hot isostatic pressing of single-crystal nickel-base superalloys: Mechanism of pore closure and effect on mechanical properties, MATEC Web of Conferences 14. 08003 (2014)
Online since: May 2016
Authors: Vimal Chandra Srivastava, Shang Lien Lo, Seema Singh
However, the comparison of the photocatalytic performances of WO3 nanoparticles depends upon the two factors namely different sizes and various calcinations temperatures.
Doping of Hf4+ shifts both VB and CB edges of WO3 upwards to enhance the water splitting without affecting the visible light absorption ability of WO3 [30].
The photocatalytic properties microstructures and compositions, of synthesized hierarchical photocatalysts (Ag/AgCl@WO3) were affected by the morphologies of the WO3 powder (i.e., nanorods and nanoparticulates), amounts of WO3 and photo reduction times.
However, optical properties, electrical conductivity, electronic band structure, chromic effect, photocatalytic properties and respective change in shape, size and morphology of WOx many fundamental issues that need to be addressed.
Jolivet, New Insights into Bi2WO6 Properties as a Visible-Light Photocatalyst, J.
Online since: July 2004
Authors: Daniel Fruchart, Patricia de Rango, Sophie Rivoirard, Salvatore Miraglia
The factor of merit of a magnet is defined by the (BH)max energy product which indicates the maximum resistance to demagnetization.
Hence, it is quite valuable to install these properties in the starting precursor.
Several routes have been proposed to develop optimized properties, namely to improve the anisotropy of a texture that is isotropic in principle.
Besides, doping of the Nd-Fe-B alloy is found of interest to generate better properties, namely the coercive field.
Kapustin: Effects of buffer layer temperature on the magnetic properties of NdFeB thin films magnets, poster Int.
Online since: September 2013
Authors: Henry Pan, Chuan Hai Jiang, Ke Zhan
Introduction S30432 austenitic stainless steel, developed on the basis of TP304H austenitic steel, is extensively used as the super-heater tubes in critical and super critical power plants, due to its superior mechanical properties at elevated temperature [1].
It is therefore of interest to apply a mechanical surface treatment to enhance their oxidization resistance.
Shot peening is a widely used surface treatment, which could improve the surface-related properties such as fatigue, stress corrosion, due to the compressive residual stress and refined microstructure in near surface layer after shot peening [4, 5].
And the mechanical relaxation of the shot peened S30432 steel has been discussed in details.
It reveals that the annealing temperature is a critical factor for micro-strain relaxation.
Online since: October 2020
Authors: Tobias Brögelmann, Nathan Christopher Kruppe, Kirsten Bobzin, Julia Janowitz
This multilayer sensor coating was deposited using an industrial coating unit and was tested with regard to the sensor properties.
The insulating protective top layer was deposited without bond coat to ensure the insulation properties to the sensor layers Ni and NiCr.
Fig. 1: Schematic procedure of the sensor coating deposition using masking Morphologie and coating properties.
Experimental Results Morphologie and coating properties.
To prove the sensor properties, the sensor coating showed in both measuring modes reproducible results.
Online since: May 2013
Authors: Chong Lin Chen, Gang Bing Song, Shu Li He, Zhong Hou Cai, Hai Ming Guo, Hong Jun Gao, Li Sun, Hong Liang Lu, Shuang Qi Song, Xiao Feng Gu
PFM provides the capability of investigating small-scale piezoelectric properties of ferroelectric thin films.
In this study, piezoelectric properties of sputter deposited BTO thin films were characterized by PFM.
Considering an amplification factor of 1000, the actual sample PR amplitude should be 1.2mV.
He, Microwave Dielectric Properties with Optimized Mn-Doped Ba0. 6Sr0. 4TiO3 Highly Epitaxial Thin Films, Cryst.
Meletis, Growth, Microstructure and Properties of Epitaxial La1-XSrxMnO3 Thin Films on Various Substrates Using RF Magnetron Sputtering, J.
Online since: October 2011
Authors: Patrick Ebunilo, S.A. Aliu
Ebunilo2,b 1,2Department of Mechanical Engineering, University of Benin, Benin City, Nigeria a eizaliu@yahoo.co.uk , bebunilo17@yahoo.co.uk Keywords: Cocoa pod, machine, bean damage, fabricate, testing Abstract: Breaking of cocoa pods in order to release the beans presently constitutes a difficult task for Nigerian cocoa farmers.
Nomenclature d = shaft diameter, mm Kb = combined shock and fatigue factor for bending moment Kt = combined shock and fatigue factor for torsional moment Mb = bending moment, Nm Mt = torsional moment, Nm P = Power required by machine, Watts Pb = Power transmitted by belt, Watts r = radius of pulley, mm T = torque, Nm T1, T2 = belt tension on tight side, belt tension on slack side of pulley, mm V = velocity of belt, m/s β = half groove angle θ = angle subtended by belt at the centre of pulley μ = coefficient of friction σs = allowable shear stress, N/mm2 ω = angular velocity, radians Introduction Cocoa, Theobroma Cacao is believed to have originated from South and Central America [1, 2].
This often results in over 5% mechanical damage to the beans and increased susceptibility to insects and fungal infestation [15, 16].
Table 1 Classification of cocoa pods CATEGORY SIZE RANGE[cm] Small 5.00-6.40 Medium 6.50-8.00 Big 8.10-9.60 Table 2 Output of broken pods CLASS OUTPUT [kg/hr] Hand operated Motorized Small 581 1139.5 Medium 437 1176.3 Big 713 1213.7 Table 3 Time to break pods and seed damage CATEGORY TIME[s] SEED DAMAGE [%] Small 2.0 0.29 Medium 3.28 0.24 Big 3.56 0.24 Discussion Though seed damage was grossly reduced by the hand operated impact cocoa pod breaker it nonetheless affected the output.
Bamgboye, Effect of some physical properties of cocoa bean on post h a harvest delay on its compressive and impact rupture, Discoveries and Innovations 15 (3) (2003) 137 – 141
Showing 25041 to 25050 of 26166 items