Search Options

Sort by:

Sort search results by

Publication Type:

Publication Type filter

Open access:

Publication Date:

Periodicals:

Periodicals filter

Search results

Online since: August 2010
Authors: Jie Liang, Shu Sheng Bi
Newton et al. [1] and Melkote et al. [2] experimentally investigated the effect of several factors on burr formation in stacks of 2024 and 7075 aluminium alloy.
During drilling of bimetallic stacked materials, in addition to the surface burrs, the interlayer burrs will form in the gap between the layers because of the drill thrust force and different bending properties at each layer, as illustrated in Fig.1.
This experimental intent is to use the general factorial design for analyzing the process parameters how to affect the burr size.
Two replicates of a factorial design in these four factors were run, with all 96 runs taken in random order.
For the interlayer burr high, it can be attributed to the interlayer gap, the thrust force and the material properties.
Online since: August 2011
Authors: Dan Ying Gao, Hua Fan, Jie Lei
As a connecting link, the cap of pile supports on the piles under column and it is the so important specimen of foundation that the research of the mechanical properties of SFRC four-pile cap becomes very meaningful.
The mechanical behavior and bearing capacity of pile caps with high strength concrete may be improved through the addition of steel fiber; its thickness may also be reduced.
The four specimens were designed, which had the same reinforcement ratio, concrete strength, the volume fraction of steel fiber and the geometry size except the thickness varying from 150mm to 400mm to investigate the affect of the effective thickness of pile cap on the load at cracking and ultimate.
When the thickness increases from 300mm to 400mm, the cracking load and the ultimate load increases by 162.5% and 94.7% respectively, which means that the effective thickness may be a main influence factor on the bearing capacity of pipe cap.
Beijing: Mechanical Industry Press, 2004, 1
Online since: April 2012
Authors: Yan Xia Feng, Chuan Zhen Huang, Xiao Jian Liu, Bing Qing He
The Depth Model for Abrasive Waterjet Milling of Ceramic Materials Yanxia Feng 1,a Chuanzhen Huang 2,b Xiaojian Liu1,c Bingqing He1 1School of Mechanical Engineering, Shandong Institute of Light Industry, Jinan 250100 2Centre for Advanced Jet Engineering Technologies (CaJET), School of Mechanical Engineering, Shandong University, Jinan 250061 afengyx11@163.com, bchuanzhenh@sdu.edu.cn,clxj@spu.edu.cn Key words: abrasive waterjet milling, ceramics, milling parameters, depth model.
The depth model of milled surface, which shows the effect of water pressure, standoff distance, lateral spacing, abrasive flow rate and the properties of the material on the AWJ milling depth, is established based on the maximal depth model for single-pass milling.
AWJ technology is a high speed solid-liquid two-phase flow, many parameters affect the milling results, which included milling process parameters, and material performance parameters.
The erosion process of brittle materials due to the formation and propagation of the lateral cracks, it is assumed that the erosion rate is estimated in terms of target material properties (fracture toughness, hardness, density, etc.) and particle properties (velocity, density, size, shape, etc.) [7].
By assuming the energy loss in the system is negligible, the velocity of the waterjet may be approximated by using Bernoulli’s equation and is given by (12) It is assumed that the incoming waterjet and the exit slurry jet momentum is equal, thus (13) Where k is a factor of momentum transfer efficiency, and v is the velocity of the particles
Online since: February 2015
Authors: Sriram P. Kalathoor
INTRODUCTION High-speed laser diagnostics are dependent on particledensity _, flow velocity u1, flow density 1, and otherfluid properties.
Additionally, thefrequency response of particles is also limited to a certainregion of the entire frequency region that a laser can provide.This again, is dependent on the material properties of theparticle, density and surface area being primary players.
VARIATION OF WAVELENGTH OF RADIATION WITH MATERIAL PROPERTIES Most metallic and non-metallic particles display varyingrefractive index responses when irradiated with varying laserwavelengths.
The reflection factor P is defined as where n is the refractive index of the medium.
“OpticallyDetectable Colloidal Metal Labels; Properties, Methods,and Biomedical Applications”.
Online since: December 2011
Authors: Hiroshi Abe, Virginie Francon, Marion Fregonese, Yutaka Watanabe
Several environmental, mechanical and microstructural parameters can affect each one of the propagation stages.
In that context, the purpose of this study is to progress in the identification of critical factors enhancing transgranular propagation of cracks.
Materials and experimental procedure Transverse tensile test specimens were machined out in a 2.5 mm thick sheet of recrystallized Zircaloy-4 provided by CEZUS, whose composition and mechanical properties are given in Table 1.
Composition (weight percent, Zr: balance) and mechanical properties of the studied Zircaloy-4 sheet. σY: 0.2% yield strength, σM: plastic instability stress, εH: homogeneous strain, A: ductility at failure.
Conclusion This work was aimed at identifying critical factors enhancing transgranular propagation of I-SCC cracks.
Online since: December 2018
Authors: Sara Verusca de Oliveira, C.M. Correia Pereira, Fábio Roberto Passador, E.A. dos Santos Filho, Edcleide Maria Araújo
One of the advantages of polymer nanocomposites over conventional composites is that nanocomposites can exhibit mechanical and thermal properties similar or superior to conventional composites even using a low amount of clay.
The formation of the carbonaceous residue affects the combustion of the PE systems with flameproof properties.
Karger-Kocsis, Morphology and mechanical properties of layered silicate reinforced natural and polyurethane rubber blends produced by latex compounding.
Nunes, Mechanical and flammability properties of EPDM (ethylene-propylene terpolymer) rubber compositions filled with carbon black and aluminum hydroxide.
Souza, Thermal and mechanical properties of PE/organoclay nanocomposites.
Online since: December 2009
Authors: Yan He, Hai Tao Li, Lian Xiang Ma
Main Properties of Carbon Black Carbon black DBP [mL/100g] Particle size [nm] N330 102 11-19 N375 114 11-19 Sample Preparation and Testing.
(5) Where, C1 is factor of the effect on crystallinity and crystal size of polymer and C2 is the factor of ease in forming conductive chains of particles.
The particle size is other factor which affects the thermal conductivity of rubber composite.
:Thermal Properties of Heat Conductive Silicone Rubber Filled with Hybrid Fillers.
:Dynamic Mechanic Properties of Particulate-filled composites, Journal of Applied Polymer Science, (1970)14(1);449
Online since: December 2012
Authors: Bin Li
Present Conditions and Fundamentals for Development of Low-carbon Clothing People’s consumption concepts decide new changes of the textile and garment industry and affect the “low-carbon” level of the industry.
Industrial experts predict that future clothing enterprises will win favor of consumers and obtain more market share if their materials and processes have the minimum hazards and their garments have the minimum carbon emissions rather than selling the largest quantity of clothes at the highest price. [1] Although the development tendency of low-carbon clothing is excellent, the low popularity of carbon clothing is mainly limited to the following factors in terms of China’s domestic market.
Self Problems of Low-carbon Clothing Limitations of Price Factors.Expensive price is the main cause of the frustration of the low-carbon clothing market.
In this way, the factors such as flexibility, pattern, color and texture etc. of low-carbon garments will be limited in the process of design, which make there are differences and distance between aesthetic property of low-carbon garments and that of common garments, directly reduce customers’ favor degree, and further decrease their purchase desire. [2] Market Reasons Clothing consumption is between durable goods and nondurable goods and is affected by economy, culture, values and human behaviors greatly, the term of “low-carbon” has appeared in the fields including politics, economy and industry as well as has become a kind of progressive environment protection concept, obligation and fashion, and entered into people’s daily life.
Physical recycling means that discarded textiles and garments can be reused after initial mechanical processing.
Online since: July 2011
Authors: Ai Min Yang
The early research believed that the chemistry nucleation happen directly on the external basis by means of some kind of chemistry reactions such as peritectoid reaction, in which the nucleating efficiency is only decided by the quantity of the external particles.In fact, heterogeneous nucleation is influenced by very many factors,such as the surface energy between the particles and the melt, the segregation of solute atoms (that will changes the surface composition of particle).
Bramfitt[1] proposed using the wrong matching degree between the nucleating atoms and the substrate to estimate the heterogeneous nucleating possibility, but Glicksman and Childs [2] noted that physico-chemical properties difference between the melt and the nucleating particles was possibly more important than the wrong matching.In recent years the people have started to pay attention to function of the solute element in the refinement process.
Here we will directly study the influence on nucleating of solute atoms by introducing the solute atom chemical property to the nucleating model, and try to give a critical criterion which shows the effect on the nucleating process of the solut segregation.
From famula (4), famula (13) is: ΔGγsegr= -0.24ΔHb0(1-xb)2+Ωb(σbls-σbls) +ΔWab Ωb (12) From the famula, the solute ingredient can also affect ΔGγsegr.
Hanqi.Hu, Metal Solidification Principle, Mechanical Industry Publishing Press. 10.
Online since: May 2011
Authors: Yi Zhu He, Guang Ping Cheng
In fact, the reduction of aluminum content will directly affect the coating oxidation resistance.
Properties such as melting and vaporization temperatures, solidification behavior as well as the physical and mechanical properties of the coating materials are important factors to be considered.
Increasing laser power, coatings dilution rates increase, the heat affected zone of the substrate expand, coating oxidation tendency become serious, even causing crack phenomenon.
Thus higher cladding power or low scanning speed can only be taken, that will result in not only high energy consumption, but also the Fe amount in coat from substrate increasing even to 40at% [11,12], and will directly affect the coating high temperature oxidation resistance.
Figure 5 shows the distribution of the coating along the thickness direction from surface to the steel substrate heat-affected zone.
Showing 21541 to 21550 of 25974 items