Search Options

Sort by:

Sort search results by

Publication Type:

Publication Type filter

Open access:

Publication Date:

Periodicals:

Periodicals filter

Search results

Online since: April 2012
Authors: Priscila Anadão, Hélio Wiebeck, Rafael Rezende Montes, Henrique Souza de Santis
PSf is important in the polymer area due to its mechanical, thermal and chemical stability as well as its excellent film forming properties.
This objective is not easy to achieve because membrane structure and performance depend on different factors such as polymer choice, solvent and non-solvent choice, composition and temperature of coagulant and casting solution, among others.
Polysulfone and NMP were mixed under mechanical stirring.
The influence of molar mass in rheological solution properties is similar to increasing polymer concentration.
Therefore, the use of different PSf concentration and molar mass can modulate surface membrane properties and their final applications by modifying pore size.
Online since: September 2016
Authors: Li Li Hu
Composition and Properties.
All above factors can greatly influence the local air condition
Physical and chemical properties of coal gangue and gangue sintered brick quality [J].
The discussion of factors influencing the coal gangue sintered brick production technology [J].
Coal gangue sintered hollow brick of selection of raw materials and process factors influencing study [J].
Online since: April 2013
Authors: Ming Jie Zhou, Jin Li Qiao, Wen Ling Tian, Fang Lu Jiang, Kun Zhao
According to the experimental results of these four walls subjected to horizontal reciprocating loads, we know that the grid-mesh frame wall's breaking form are in stages and multiple modes, and the main influencing factors are height-width ratio and grid form, what's more, with cast-in-place plaster as fill material, could not only improve the level of the wall bearing capacity and stiffness, but also improve the ductility and seismic energy dissipation capacity.
Table 1 The basic parameters of specimens Specimen Numbers Specimen size ( mm)(High×width× thick) Wall height-width ratio Gypsum situation WGQ-1 1950×1550×125 0.8 No SWGQ-1 1950×1550×125 0.8 Yes WGQ-2 2625×1550×125 0.6 No SWGQ-2 2625×1550×125 0.6 YES (a)WGQ-1,SWGQ-1 (b)WGQ-2,SWGQ-2 Fig 1 The size of Component a)Rib beam (b)Rib column (c)Frame column (d)Frame beam Fig.2 The section size and reinforcement Mechanical properties of material.
The main influence factors of bearing capacity and failure mode is height-width ratio of wall, opening of window and cast-in-place gypsum .Wall member has a good seismic performance.
The ultimate bearing capacity of the wall is not simple improve as rib beam longitudinal bar or rib column of longitudinal reinforcement increases .Section reinforcement ratio of Rib beam rib column affect the cross section characteristics of he frame structure, so ,also influence the collaborative working performance of grid and gypsum .
Online since: January 2012
Authors: Peter Hodgson, Pavel Cizek, A.S. Taylor, Hossein Beladi
The corresponding texture was essentially random, in contrast to that of the DRX grains dominated by low Taylor factor components.
Each of these processes can alter the austenite microstructure and texture characteristics, thus affecting the hot working loads, transformation products on cooling and final mechanical properties.
It is seen that the characteristics of the second deformation flow curves were significantly affected by the post-deformation holding.
Moreover, the low Taylor factor grains containing low dislocation density can be expected to preferentially consume, and thus replace, high Taylor factor grains having a comparatively high dislocation density during the progress of DRX.
This would explain the observed dominance of the A texture component, having the lowest Taylor factor (i.e. 1.7) among the main components, in the obtained DRX texture.
Online since: September 2016
Authors: Evangelos Efthymiou, Alexios T. Ampatzis, Vasileios G. Psomiadis
Despite inherent similarities with steel, their mechanical properties are significantly different, while even properties of the same alloy differ when it undergoes different fabrication processes and heat treatments [2].
Stress-component capacities for each limit state are calculated based on EC9 guidelines and respective HAZ affected values are produced by multiplying with the reduction factors, ρο.haz = 0,42 and ρu.haz = 0,48 for alloy 6082-T6.
Safety Factors for LA & ESD with/without limited kinematic hardening, inc.
Safety Factors for LA & ESD with/without limited kinematic hardening, not inc.
Although, naturally, the absolute values of limit and shakedown safety factors calculated are higher when no HAZ are considered, greater relative gains are observed when combining the effect of HAZ and hardening.
Online since: March 2016
Authors: Sai Nan Gu, Yuan Qin, Sen Yang, Guang Yuan Wang
The influence of the mass ratio of W and Cu on the structure and properties were investigated.
However, the highest relative density of W-Cu composites was only 75.0%, which was caused by two factors.
Influence of activators on properties.
Zheng, et al., Properties of W–Cu composite powder produced by a thermo-mechanical method.
Roderick, The physical properties of liquid metals, Clarendon Press, Oxford (1993)
Online since: July 2018
Authors: Chang Yong Song, Doo Yeoun Cho
In the context of structural performance on LNG cargo hold, the mechanical and thermal behaviors of insulation material under cryogenic temperature are considered as one of the critical factors for the hold design.
In regard of researches on cryogenic material behavior, Kaveh et al. studied the effect of deep cryogenic treatment (−196°C) on microstructure and mechanical properties of AZ91 magnesium alloy [7].
Xiao et al. investigated the microstructures and mechanical properties of a Cu–Zn alloy subjected to dynamic plastic deformation (DPD) at liquid nitrogen temperature (77 K) [10].
Convective heat transfer depends not only on the fluid velocity but also on the properties of the fluid such as viscosity, thermal conductivity, density, specific heat, solid surface roughness, and fluid flow.
Lu, Microstructures and mechanical properties of a Cu–Zn alloy subjected to cryogenic dynamic plastic deformation, Mat.
Online since: January 2013
Authors: Aleksandar Subic, Mladenko Kajtaz, Monir Takla
In order to achieve the best and the quickest solution, the proposed approach was utilised to identify and manipulate the main influences and interactions between design parameters and uncertainties affecting objectives.
For each of the components, a thickness of the component and Young’s Modulus, as the material defining property are used as the input parameters.
This value was expected to be lower than the efficiency factor of 2.7 calculated earlier because the time improvement factor was related to the non-dominated solutions only, whereas the efficiency factor was related to all generated solutions.
Dixon, A review of research in mechanical engineering design.
Dixon, A review of research in mechanical engineering design.
Online since: December 2014
Authors: Rogério Hermida Quintella, Lisa Sahadia de Oliveira Carvalho, Bárbara Ariela da Silva Leite, Roberto Brito Velame, Rosana Muñoz
There are also other reports of improved mechanical properties in fiber reinforced concrete, as Malagavelli and Rao [7] who assert that the addition of fibers in concrete would substantially improve the tensile strength, cracking resistance, impact strength, wear and tear, fatigue resistance and ductility of concrete.
Fibers are very efficient in improving the dynamic properties of concrete, especially with respect to fatigue strength [17].
These variables will have a significant influence on concrete properties, as displayed in Table 1.
Table 1: The influence of adding fibers on concrete properties Properties Influence Workability The addition of any type of fiber in concrete reduces workability.
Kosior, Thermal and Mechanical properties of recycled PET and its blends, in: ANTEC 2005 Society of Plastics Engineers Annual Technical Conference (2005), pp. 3221-3225
Online since: August 2016
Authors: Ibtissam Kourdou, Toufik Cherradi
These techniques include adding substances to the earth or modify the land-water-air soil skeleton in order to improve some of its mechanical properties such as swelling clays or its compressive strength.
This procedure gives also the other more useful properties to the construction.
As its name suggests, it refers to a problem affecting the supporting structure of the building.
In other cases, it can be a symptom of more serious conditions such as those affecting foundations or evolving cracks.
In the case of Tiznit, tests performed on a sample of soil survey at the ruins of a house destroyed by floods gave an incompatibility of properties with the criteria set by the regulation.
Showing 19971 to 19980 of 25965 items