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Online since: February 2014
Authors: Hai Yan Yin, Chun Cheng Zuo, Yan Xin Cao, Da Yi Yang
In this article, we deduced microparticle clustering in Z and X direction Coordinate equation, discussed in detail the various factors influencing particles equilibrium position in the liquid medium.
Separation of particles is directly affected by external forces.
Through the analysis of stress and motion of particles, the different particles are in different equilibrium positions; the influential factors of the equilibrium position will be analyzed and discussed in detail in this paper.
Particles of different property will gather at different heights.
Summary In this paper, we study the aggregation behavior of particles in a fluid medium, discussed in detail the various factors influencing the particle mechanical movement particulate matter - tiny particles in the liquid medium.
Online since: July 2022
Authors: Andrea Ghiotti, Stefania Bruschi, Enrico Simonetto, Zheng Liu
Compared to the traditional thermoset-based FMLs, thermoplastic-based FMLs show significant merits, like recyclability and improved mechanical properties with a lower density.
Table 1 reports the obtained mechanical properties.
Bienias, The comparison of effects of hygrothermal conditioning on mechanical properties of fibre metal laminates and fibre reinforced polymers, Compos.
Experimental and numerical investigations on the quasi-static structural properties of fibre metal laminates processed by thermoforming, Compos.
Preparation and properties of Fibre-Metal Laminates based on carbon fibre reinforced PMR polyimide.
Online since: March 2025
Authors: P. Krishna Kumar, E.S. Karthic, Mahmoud Al Khazaleh
The preliminary trials concentrated on integrating air into concrete mixtures to decrease weight without substantially affecting strength.
Variations in the mix design, including the kind and quantity of cement, the inclusion of retarders or accelerators, and environmental factors like temperature and humidity, can affect the first setting time.
Controlling these factors on big building sites can be challenging, which may result in possible quality shortcomings.
Liu, “A novel lightweight concrete-fabrication and its thermal and mechanical properties,” Constr.
Wang, “Mechanical, thermal insulation, thermal resistance and acoustic absorption properties of geopolymer foam concrete,” Cem.
Online since: March 2015
Authors: Hong Bo Liu, Jing Sun, Xiao Hong Cong
The durability is the key about how to study the Green High Perforcemence Concrete (GHPC).Much work has been done by many scholars on the duravility of RAC.However, more study focus on the mechanical performance.
Feng et al. [13] summarized that a number of factors such as:the recycled aggregate concrete,the ratio of water and cement,the variety and dosage of gelled material, curing conditions and the load would have important influence on the carbonation.
The Sulfate Corrosion Resistance.Yan hongsheng [14] found that after the water cement ratio was reduced and the fly ash was mixed into the recycled concrete, the internal pore structure of the recycled concrete can be improved, the speed and the number of crystallization would be reduced greatly in the aggregate clearance, and the sulphate corrosion resistance is improved.An et al.[15]observed that Na2SO4 erosion has different influence on mechanical properties of recycled aggregate concrete for different substituting ratio of recycled aggregate.Their cleavage strength and relative dynamic modulus of elasticity increase gradually in the initial stage of immersion-dry cycles.the overall tendency of relative dynamic modulus of elasticity and cleavage strength were diminishing with increased immersion-dry cycle number in the later phase of immersion-dry cycles.
It is not enough that researchers usually only consider a kind of influencing factors and the mutual coupling should be considered after various factors affected.Numerous studies have gathered in the coarse aggregate concrete, the study of fine aggregate concrete should also be strengthened.On the durability of the recycled concrete, scholars should not only on the macro phenomenon, but more on the micro structure level of the mechanism.
References [1] L.Wenxia, Z.Xiong and L. xin, Mechanical Properties of Recycled Aggregate Concrete Study of The Impact Factors.concrete, Number 10 in 2009(Total No.240),60-63(In Chinese) [2] Kou, S.C. and Poon,C.S, “Compressive strength, pore size distribution and chloride-ion penetration of recycled aggregate concrete incorporatin class-F fly ash”,Journal of Wuhan University of Technology -Mater.
Online since: January 2006
Authors: Alexei Vinogradov
The question of fundamental interest for materials science is whether these materials can be ascribed to a new class of solids having distinct properties in a way similar to nano-materials or metallic glasses, or, alternatively, their properties can be logically predicted by expanding the presently available knowledge about ordinary polycrytslalline metals.
Using transmission electron microscopy, including high resolution, they have demonstrated that namely heavily distorted grain boundaries with excess grain boundary dislocations and other defects formed during SPD appeared as a unique feature of SPD metals, affecting most physical and mechanical properties.
Hence, these materials may inherit some properties from both crystals and glasses, while potentially remaining distinct from both of these extremes.
(1) where /2uF is the stress amplitude, Kb and n' are material properties.
This phenomenon is affected by a many structure sensitive factors and testing conditions.
Online since: November 2012
Authors: Zhao Hua Zhang
Currently, theoretical researches on bearing force of pile-supported composite foundation and its stability are great in number whereas ones on factors affecting uneven settlement of pile-supported composite foundation and how to shorten the duration of foundation treatment are small in number.
Therefore, it is necessary to begin experimental researches on factors affecting uneven settlement of pile-supported composite foundation and how to shorten the duration of foundation treatment for guiding the design.
In this respect, two experimental sectors are set in an experimental section of Fujian Highway to conduct on-site model tests for factors affecting uneven settlement of pile-supported composite foundation and how to shorten the duration of foundation treatment.
Physical and mechanical parameters of embankment main stratums is shown in table 1.
The property of the soil among the piles can affect the geostatic arch effect on the top of the embankment [3].The bigger the compression modulus in the soil among the piles is, the smaller the ratio of stress between the piles and the soil is.
Online since: February 2013
In Jilin University, Ma's lab is actively engaged in the preparation of biodegradable films and study of their mechanical properties.
Wang et al investigated the effect of drying time, drying temperature, plasticizer and thickening agents on the mechanical properties of cabbage-based edible films, and the results are presented in their paper 'Mechanical properties of Cabbage-based Edible Films'.
Zhong et al studied mechanical properties of methylcellulose-based films containing stearic acids, and the influence of the microwave and ultrasonic synergistic effect on properties of methylcellulose/stearic acids films, as well as how fatty acids may affect the properties of methylcellulose-based bi-layer edible films.
Li et al investigated two factors including fermentation temperature and extra carbon.
In the paper 'Preparation and properties of thermo-sensitive resin for processless CTP plate' a new type of thermo-sensitive resin is prepared.
Online since: February 2019
Authors: K.Mallikharjuna Babu, Martin Jebraj, Madhav Murthy
Researchers have suggested stochastic and deterministic factors responsible for quality of laminate and pattern of flow.
Temperature of mold, infusion pressure and rate of flow are the deterministic factors [14].
In this work an attempt has been made to use a greater volume fraction of reinforcement as it contributes significantly to the mechanical properties.
Factors affecting mechanical properties of the laminate are curing, length, shape, orientation of fiber, viscosity of the resin, voids, wettability and permeability.
Conclusion It can be concluded that higher percentage of volume of fibers yields higher mechanical properties with fabric of 0.3mm thickness and 7781 fabric style of e-glass fibers.
Online since: March 2013
Authors: Petr Slobodian, Robert Olejnik, Pavel Riha, David Petras
The conductance properties of multi-walled carbon nanotube mats and their polystyrene composite were examined to investigate the mechanism of conduction and the specific role of the supporting polymer.
This mechanism is affected by the polymeric portion of the composite, since the temperature dependence of the composite conductance is decreased.
Consequently, numerous studies were aimed to reveal its mechanical, electrical and other properties.
T denotes temperature, b is constant depending on the geometrical factors from the effective fraction of the length for the barrier portion and c is constants depending on the barrier to conduction parameters [6-9].
Summary Conduction properties of a multi-walled carbon nanotube mat and its polystyrene composite were investigated using a four-point measurement system over a broad range of temperatures.
Online since: June 2013
Authors: Sinem Üzgür, M.C. Kushan, Yağız Uzunonat
Now let us briefly determine these effects; Oxidation Oxidation is one of the most serious factors acting on the gas turbine’s service life and can be determined as the reaction of materials with oxygen in 2-4 atm. partial pressure [1].
Material Properties of MoSi2.
Conclusion By considering the room temperature fracture toughness and creep behaviour at 1200 oC along with the oxidation resistance around 900 oC we can see a wide spectrum of mechanical and environmental properties have been measured in order to establish feasibility of an MoSi2 composite with Si3N4 particulate.
Sudarshan; 1998; Molybdenum disilicide materials and their properties, Material Modification Inc
Newman, Microstructure and properties of molybdenum disilicide and its composites, Ph.D.
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