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 2011
Authors: Hua Qing Wang, Jie Cheng, Zheng Ping Fang, Hong Qiang Yan
The glass fiber reinforced composites for this blends are made and their properties are studied.
By altering the relative amounts of each polymer in the IPNs, the individual polymer properties may be changed, in which the lower Tg component is shifted to a higher temperature, while the higher Tg component is shifted to a lower temperature.13 This characteristic structure of IPNs may result in synergistic effect on properties, which is expected to combine good properties of different polymers.14 The object of this study is to provide a novel IPNs BT resin containing a naphthalene structure and analyze their laminate properties.
The ridges between interlaced network are been increased due to being a few of co-polymerizations between BMPN and DNCY, which implying enhanced propensity for brittle failure in tune with the results on mechanical properties.
Properties analysis of glass fibre reinforced composites for the novel IPNs BT resin containing naphthalene structure Flexural property The flexural property of bismaleimide resins is not good in the limit to their application.10 To enhance flexural property, the ether linkage is introduced into the structure of novel BT resin.
M., High Performance Thermoset, Chemistry, Properties, Application, Hanser, 1993
Online since: June 2012
Authors: Xiang Hui Zhang, Fan Chong Zeng
Studied how the length of two resonance rods affects the resonance frequency.
Introduction Advanced ceramics are likely candidates for many industrial applications due to their superior properties.
In the ultrasonic machining environment, the location of node plane is determined to be the joint of between piezoelectric ceramic disks and front resonance rod to reduce the mechanical loss [3].
The material of piezoelectric ceramic disks should have lower dielectric loss factor, lower mechanical loss coefficient, higher electromechanical conversion coefficient and higher piezoelectric constant.
Firstly, assume that the materials are isotropic and uniform, and ignore the mechanical loss.
Online since: July 2004
Authors: K. Pękała, Jerzy Latuch, P. Jaśkiewicz, L. Nowiński, J. Antonowicz
The results allow to optimize preparation conditions for nanocrystallizing Al-based alloys with enhanced mechanical properties.
Introduction The fcc Al nanocrystals precipitated in amorphous Al-based alloys cause the enhancement of mechanical properties [1].
This interaction is not affected by the inner side 4f states which are screened by 5s and 5p electrons.
Summary The detailed analysis of electron transport properties of numerous alloys from the Al-Y-Ni, Al-Y-Cu families shows that the strong Al-TM and Al-Y bonds are formed by filling the 3d and 4d states of TM and Y atoms by the 3s and 3p electrons from Al.
The above experimentally established interplay between the chemical composition and nanocrystallization of Al base alloys allows to taylor alloys with requested superior mechanical properties.
Online since: May 2014
Authors: Raj Das, Giacomo Po, Nasr Ghoniem, Nathaniel James Burbery
Note: The numerical results are not directly transferrable to “real world” properties, because the inherent limitations of the atomistic method necessitate the use of unnaturally high strain rates (i.e. comparable to 1010 s-1 applied in prior studies [8]).
Nucleation of stacking faults, and dislocation interactions are also largely affected by localized defects or irregular GB structures [8, 11].
The visual results demonstrate that dislocation nucleation occurred on multiple slip systems that cannot correspond with the maximum Schmid factors, because only two maximum Schmid factor slip systems existed in this case.
Overall, this article concludes that the plastic deformation response in FCC metal polycrystals is influenced quite significantly by the presence of GBs, not as immobile barriers to slip, but as a consequence of complex elastic interactions affecting the slip systems of dislocations.
Suresh, Mechanical behavior of nanocrystalline metals and alloys.
Online since: May 2014
Authors: Dave Mennel, Zak Pramann, Jim Chrzanowski, Brian Thompson
CDA18150 is a Chromium Zirconium copper that has high electrical conductivity and high mechanical properties making it ideal for resistance welding electrodes [3,4].
The combination of these factors resulted in FSW tools that were only capable of producing two welds before requiring replacement.
Properties of Wrought Coppers and Copper Alloys.
The Joint Properties of Copper by Friction Stir Welding.
Microstructures and Mechanical Properties of Friction Stir Welded Dissimilar Copper/Brass Joints.
Online since: July 2015
Authors: A.G. Jaharah, C.H. Che Hassan, A.K.M. Amin, M.K. Nor Khairusshima
FRP is light in weight, high modulus, specific strength [1], high damping, low thermal expansion and good dimensional stability [2;3] which make it is suitable to be used in various applications of mechanical engineering such as automobile, biomechanics and aerospace [4].
Therefore, the manufacturing cost of CFRPs’ parts need to be minimized, the factors that influenced the end product’s surface quality such as cost of severe tool wear, which shortens the tool life, fibre pull-out and delamination of CFRP need to be eliminated.
FRP’s composites contain two phases of materials with drastically distinguished mechanical and thermal properties.
Table 1 Physical Properties of CFRP Tool material Solid uncoated carbide Work material Carbon fibre reinforced plastic Cutting speed (m/min) 160, 165 and 194 Feed rate (mm/tooth) 0.14 and 0.225 Depth of Cut (mm) 0.55 and 0.91 Result and Discussion Tool Wear Mechanism In machining of CFRP, tool wear is one of important aspect.
(a) V= 165, F= 0.14, D0.55 (b) V= 165, F= 0.225, D0.91 (c) V= 194, F= 0.14, D0.91 Fig. 4 Distance travelled at different cutting parameter Conclusion Severe tool zone affects the tool performance as it reduces the tool life at higher cutting parameter.
Online since: November 2012
Authors: Guo Liang Chen, Chuan Guo Cai
Instruction Reinforced concrete consists of two materials with different physical and mechanical property.
However, given the many factors that could affect the bond, to establish a reasonable theoretical model is still some way off.
As we all know, concrete is a material with disparate mechanical property to stretch or compression.
The disparate property will definitely affect the bond-slip characteristic of the structure bearing alternating load.
Xu: Test study of properties of reinforced-concrete bonded anchor [PhD] 1990, (Tsinghua University), in Chinese
Online since: October 2010
Authors: Zhi Yuan Zhang, Ju Li Li, Qi Li
The quality of a product affected directly on the performance and service life [1-3].
Then the study on the automatic balancing machines with independent intellectual property rights is imperative.
It consists of the mechanical base, measurement and control unit and execution unit [6].
The mechanical base of the automated balancing machine is consisted of the turntable, rotor bed, jig, milling drive and feed.
The unbalance signal is weak and the interference factors are great, it is necessary to filter and amplify the signal before the correct calculation.
Online since: August 2014
Authors: Miroslava Netopilová, Anna Benešová, Jan Mikulenka
It is a known fact that timber constructions are distinguished by numerous advantages, such as good mechanical and physical properties, compatibility with health and environment, availability and renewability, economy, etc.
For example, the properties, including fire technical characteristics, of final products can be affected to a great extent by aimed choice of the matrix materials, as well as of particle or fibrous dispersed phase of wood composite.
Asbestos was commonly used till the second half of the last century due to its price availability and especially to characteristic properties such as rigidity, elasticity, chemical stability, electric insulation, and thermal resistance.
Partial replacement of wood components by suitable inorganic material provides the means of the improvement of some physical and mechanical properties, and probably of fire technical characteristics as well.
The aim of the research is the utilization of secondary raw materials, as well as the gaining of required properties, including fire and technical characteristics.
Online since: July 2014
Authors: Gang Hu
As an extreme weather that affect the visibility, the fog bring about road transport paralysis or even an accident usually, and causing serious losses to the national economy and people's lives and property.
The other important factor which it affecting road safety was the traffic and weather information dissemination.
Fourth, on the basis of satisfying the above principle, it should be as close to the communications and power facilities, and taking into account the theft factors and not interfere with other factors.
The scope determine through major networked data to distinguish the number,the length and the time of affected sections.
Conclusion As one of the important factors, people have paid more and more attention about fog.This paper proposed needs of road safety on foggy expressway, including fog surveillance, information dissemination, travel inducing, and establish the travel inducing system.
Showing 17251 to 17260 of 25958 items