Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: July 2014
Authors: Xiao Lei Chang, Song Gu, Zhi Zheng
Recycled aggregate crushing effect factors
Crush indicator is a parameter that is the aggregate strength.
In addition, the maximum size of aggregate affecting crushed indicator.
Aggregate properties on concrete fracture performance and acoustic emission characteristics of [j].
[3] Ai tc in PC,Me h ta P K.Effect of coarse aggregate characteristics on mechanical properties of high-strength concrete[J].ACI Materials Journal, 1990,87 ( 2) : 103- 107
[4] Wu K R,Chen B,Yao W, et al.Effect of coarse aggregate type on mechanical properties of high-performance concrete[J].Cement and Concrete Research,2001,31( 10) : 1421-1425
In addition, the maximum size of aggregate affecting crushed indicator.
Aggregate properties on concrete fracture performance and acoustic emission characteristics of [j].
[3] Ai tc in PC,Me h ta P K.Effect of coarse aggregate characteristics on mechanical properties of high-strength concrete[J].ACI Materials Journal, 1990,87 ( 2) : 103- 107
[4] Wu K R,Chen B,Yao W, et al.Effect of coarse aggregate type on mechanical properties of high-performance concrete[J].Cement and Concrete Research,2001,31( 10) : 1421-1425
Online since: December 2022
Authors: Jalal Chafiq, Ilham Ouchte, Mohamed Ait El Fqih
The thermal characteristics and the mechanical properties are determined over a temperature range from ambient to 60°C.
Ouchte et al. [2] investigated the effect of thermal treatment on the mechanical properties of jute/epoxy.
Uzay et al [5] investigate into effect of the post-curing heat treatment process on the mechanical properties of fiber reinforced polymer (FRP) composites.
Table 1 represents the properties of epoxy resin and glass fiber.
The simplified Johnson-Cook model is widely accepted to describe the coupling factors among stress, strain, and strain rate [8].
Ouchte et al. [2] investigated the effect of thermal treatment on the mechanical properties of jute/epoxy.
Uzay et al [5] investigate into effect of the post-curing heat treatment process on the mechanical properties of fiber reinforced polymer (FRP) composites.
Table 1 represents the properties of epoxy resin and glass fiber.
The simplified Johnson-Cook model is widely accepted to describe the coupling factors among stress, strain, and strain rate [8].
Online since: September 2013
Authors: Kwong Yiing Ting, Boon Hoe Goh, Wee Kang Choong, Abdullahi Ali Mohamed
Thus, high temperature stiffness and low temperature flexibility are both important properties in bituminous mixtures to avert rutting and cracking.
Required number of samples for the experiment depends on the number of factors considered in the study.
In this study, even though there are four influencing factors that may have an effect on the mechanical properties of asphaltic concrete mixtures, two factors are fixed and there are only two factors that vary.
The fixed factors are bitumen content and rate of loading whereas the varying factors are bitumen types and temperature.
Mohamed: A study on the physical and mechanical properties of asphaltic concrete incorporating crumb rubber produced through dry process (2007)
Required number of samples for the experiment depends on the number of factors considered in the study.
In this study, even though there are four influencing factors that may have an effect on the mechanical properties of asphaltic concrete mixtures, two factors are fixed and there are only two factors that vary.
The fixed factors are bitumen content and rate of loading whereas the varying factors are bitumen types and temperature.
Mohamed: A study on the physical and mechanical properties of asphaltic concrete incorporating crumb rubber produced through dry process (2007)
Online since: January 2014
Authors: Zheng Tang Liu, Xing Sen Che
Up to now, some optical, electrical, mechanical and structural properties have already been reported for a-Ge1-xCx:H films prepared by using different techniques, such as chemical vapor deposition [7-9], plasma deposition processing [10, 11], all of which can get a high quality film.
As an absorber layer applied for a tandem solar cell, it is important and meaningful to investigate the optical and chemical bonding properties of a-Ge1-xCx:H films.
As is known that the change in the optical properties of the films mainly depends on the composition and structure of the films and all the samples fabricated have amorphous structure.
Therefore, the optical gap of the a-Ge1-xCx:H films are mainly affected by the composition and atomic bonding character of the films.
Although the content of hydrogen in the films can not be obtained by XPS, the relative atomic concentration of C, Ge and O in the films is unaffected and obtained from the computation of the sensitivity factors and peak areas of C1s, Ge3d and O1s.
As an absorber layer applied for a tandem solar cell, it is important and meaningful to investigate the optical and chemical bonding properties of a-Ge1-xCx:H films.
As is known that the change in the optical properties of the films mainly depends on the composition and structure of the films and all the samples fabricated have amorphous structure.
Therefore, the optical gap of the a-Ge1-xCx:H films are mainly affected by the composition and atomic bonding character of the films.
Although the content of hydrogen in the films can not be obtained by XPS, the relative atomic concentration of C, Ge and O in the films is unaffected and obtained from the computation of the sensitivity factors and peak areas of C1s, Ge3d and O1s.
Online since: January 2012
Authors: Xian Fu Cheng
Zhang et al. [5] proposed a model of describing relationships among functional requirements and structural characteristics, design parameters and uncontrollable factors in non-linear systems.
In reality, design parameters in the physical domain may have variations (∆DP= DP - DP*) caused by changes in the environment including material characteristics, geometrical properties, manufacturing processes, analysis/simulation model accuracy, loads, and/or operational environments.
The above equation shows there are two groups of factors affecting the total squared deviation in FR: the Σ∆DP coming from variations in manufacturing, material and usage; and the inner product of [B] matrix, which amplify the total variance of DP.
Bao, et al.: Chinese Journal of Mechanical Engineer Vol. 45 (2009), p.207-215, in Chinese
Li: Journal of Mechanical Design Vol. 131(2009), p.1-9
In reality, design parameters in the physical domain may have variations (∆DP= DP - DP*) caused by changes in the environment including material characteristics, geometrical properties, manufacturing processes, analysis/simulation model accuracy, loads, and/or operational environments.
The above equation shows there are two groups of factors affecting the total squared deviation in FR: the Σ∆DP coming from variations in manufacturing, material and usage; and the inner product of [B] matrix, which amplify the total variance of DP.
Bao, et al.: Chinese Journal of Mechanical Engineer Vol. 45 (2009), p.207-215, in Chinese
Li: Journal of Mechanical Design Vol. 131(2009), p.1-9
Online since: October 2002
Authors: Albano Cavaleiro, J.C. Oliveira, Maria-Teresa Freire Vieira
This study is part of a research project which main objective is the development
and optimisation of AlN(Er) thin films with luminescent properties suitable for use as sensors
in the evaluation of wear and corrosion strength of mechanical components.
The mechanical properties of the AlN(Er) films are not committed by thermal annealing.
Introduction Aluminium nitride (AlN) exhibits excellent physical, chemical and mechanical properties, which make it potentially useful for a wide range of practical applications.
In a previous work AlN(Er) films were deposited by magnetron sputtering and the mechanical behaviour as well as the photoluminescence properties of the films were evaluated.
The mechanical properties of the AlN(Er) films are not committed by thermal annealing at 875 K for 1 h.
The mechanical properties of the AlN(Er) films are not committed by thermal annealing.
Introduction Aluminium nitride (AlN) exhibits excellent physical, chemical and mechanical properties, which make it potentially useful for a wide range of practical applications.
In a previous work AlN(Er) films were deposited by magnetron sputtering and the mechanical behaviour as well as the photoluminescence properties of the films were evaluated.
The mechanical properties of the AlN(Er) films are not committed by thermal annealing at 875 K for 1 h.
Online since: February 2008
Authors: Peter Hodgson, Vincent Lemiale, C. Yang, Bernard F. Rolfe, S.A. Asgari
Martensite and carbon content in the microstructure
greatly affects the mechanical properties of AHSS, underlining more importance on microstructural
discontinuities and their multiphase characteristics.
The introduction of AHSS implies that one needs to know their mechanical properties and consider their multiphase microstructural behaviour in the predictive modelling.
Each phase has different material properties and/or material orientations and can be inhomogeneous at some smaller length scales.
Instead of constitutive relations at the macroscale level, the microstructural material properties and morphologies are assumed known a priori (Fig. 1).
The most reasonable estimation of the averaged properties are obtained with periodic BCs [6].
The introduction of AHSS implies that one needs to know their mechanical properties and consider their multiphase microstructural behaviour in the predictive modelling.
Each phase has different material properties and/or material orientations and can be inhomogeneous at some smaller length scales.
Instead of constitutive relations at the macroscale level, the microstructural material properties and morphologies are assumed known a priori (Fig. 1).
The most reasonable estimation of the averaged properties are obtained with periodic BCs [6].
Online since: February 2018
Authors: Xiao Zhang, Xin Xing Zhou
Moreover, foaming and nucleation and growth mechanisms is closely related to the thermal and mechanical properties of SPU.
Zou et al [11] investigated the effect of hard segments on the thermal and mechanical properties of polyurethane foams.
The morphology results matched well with mechanical properties results.
As described elsewhere, the SPU with the hydroxyl groups enriched on their surface and improved their mechanical properties.
Kaur, Mechanical and thermal properties of castor oil-based polyurethane adhesive: effect of TiO2, filler, Advances in Polymer Technology. 35 (2016) 1082-1089.DOI: 10.1002/adv.21637
Zou et al [11] investigated the effect of hard segments on the thermal and mechanical properties of polyurethane foams.
The morphology results matched well with mechanical properties results.
As described elsewhere, the SPU with the hydroxyl groups enriched on their surface and improved their mechanical properties.
Kaur, Mechanical and thermal properties of castor oil-based polyurethane adhesive: effect of TiO2, filler, Advances in Polymer Technology. 35 (2016) 1082-1089.DOI: 10.1002/adv.21637
Online since: June 2024
Authors: Camille D. Eguita, Reylina Garcia Tayactac
This study aims to identify factors that contribute to convective heat transfer, such as building design, insulation, and ventilation, and assess their impact on energy consumption and indoor air quality.
This research aims to identify factors such as building design, ventilation, and insulation that contribute to convective heat transfer and assess their effects on thermal comfort.
· To identify the factors that influence the convective heat transfer and indoor thermal comfort in multi- story buildings in Metro Manila
The study identified building design, insulation, and ventilation as critical factors that contribute to convective heat transfer, and the reduction in convective heat transfer through these factors resulted in lower energy consumption, higher thermal comfort, and improved indoor air quality.
To the researcher’s property management team and colleague, Engr.
This research aims to identify factors such as building design, ventilation, and insulation that contribute to convective heat transfer and assess their effects on thermal comfort.
· To identify the factors that influence the convective heat transfer and indoor thermal comfort in multi- story buildings in Metro Manila
The study identified building design, insulation, and ventilation as critical factors that contribute to convective heat transfer, and the reduction in convective heat transfer through these factors resulted in lower energy consumption, higher thermal comfort, and improved indoor air quality.
To the researcher’s property management team and colleague, Engr.
Online since: March 2011
Authors: Jiu Hua Xu, Guo Sheng Geng, B. Yang, L.L. Su, S.N. Galyshev
It is well known for its outstanding mechanical properties such as high strength and corrosion resistance, particularly at elevated temperatures.
On the other hand, Inconel 718 is also known to be one of the most difficult-to-cut materials, and the properties responsible for the poor machinability of it are as follows [1-3].
A major part of Inconel 718’s strength is maintained during machining due to its high-temperature properties, resulting in a large cutting force.
Due to the above mentioned machining properties, especially the large cutting force and cutting force fluctuation, the quality of the machined surface of Inconel 718 may be deteriorated [7, 8].
The factors and levels of different cutting tools are shown in table 4.
On the other hand, Inconel 718 is also known to be one of the most difficult-to-cut materials, and the properties responsible for the poor machinability of it are as follows [1-3].
A major part of Inconel 718’s strength is maintained during machining due to its high-temperature properties, resulting in a large cutting force.
Due to the above mentioned machining properties, especially the large cutting force and cutting force fluctuation, the quality of the machined surface of Inconel 718 may be deteriorated [7, 8].
The factors and levels of different cutting tools are shown in table 4.