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Online since: April 2022
Authors: Facundo Atuel Retamal, Viviana Carolina Rougier
The inclusion of fibres to the mix decrease its flow but increases its mechanical properties.
The curing of the material influences its physical and mechanical properties significantly.
The compressive strength of FC is influenced by various factors, such as density, cement content, water-cement ratio, type, properties and amount of aggregates to be used and curing conditions among others [1].
The properties of the paste or mortar influence only this coefficient, while they do not affect on b [71].
Affecting these relationships by a reduction factor ηE, determined with 20, the elastic modulus of lightweight concrete is obtained, as shown in Eq. 21.
Online since: July 2019
Authors: Bohumír Strnadel, Ying Su, Xiong Jue Wang, Jian Xiang Huang, Xing Yang He, Zheng Qi Zheng, Chen Zhang, Jin Yang
The effects of different content and medium particle size of FA on mortar`s electrical resistivity, chloride penetration and mechanical properties are investigated.
The factors of damage are diverse.
However, in the final analysis, harmful substances in the environment penetrate into the concrete, affecting the normal use and the durability of the concrete [1-3].
The chemical composition and basic physical properties of Portland cement and FA are shown in Table 1.
Effect of fly ash on frost-resistance and chloride ions diffusion properties of marine concrete." 
Online since: June 2014
Authors: Abdul Manan Siti Najihah, Zurina Mohamad
It has good mechanical properties which are close to elastomeric materials in softness and flexibility.
The mechanical properties were determined by means of tensile and flexural test.
Mechanical properties The mechanical properties including tensile and flexural testing were carried out using Lloyd universal testing machine at room temperature, following the procedures as described in ASTM D412 and ASTM D790-07.
However, the morphology of polymer blend is a major factor affecting the overall properties of polymer blend and in this is case PLA/EVA blend.It is believed that PLA and EVA had a dispersed EVA domain in PLA matrix morphology.
The variation of EVA domain size will determine the mechanical properties of PLA/EVA blend.
Online since: July 2014
Authors: S. Hiremath Somashekhar, Lijo Paul
Effect of process parameters on heat affected zone in micro machining of borosilicate glass using µ-ECDM process Lijo Paul a and Somashekhar S Hiremath b Precision Engineering and Instrumentation Laboratory, Department of Mechanical Engineering, Indian Institute of Technology Madras, Chennai - 600036, India alijo.paul@gmail.com, bsomashekhar@iitm.ac.in Keywords: µ-ECDM, heat affected zone, material removal rate, grey relational analysis Abstract.
Application of borosilicate glass in Micro Electro Mechanical Systems (MEMS) devices are increasing due to many of its intrigue properties.
But still many limitations like Heat Affected Zone (HAZ) and cracking in glass limited its application.
Duty factor is found to be a predominant factor affecting the machining characteristics.
Since voltage and duty factor are contradicting muli objective optmisation is done with GRA [9-10].
Online since: October 2013
Authors: Yun Zeng, Jing Tian
Main affect factors of curriculum teaching system are teaching rhythm ratio and learning damping of students.
However, the lacks of appropriate methods research the relationship between two main factors and expressed characteristics of curriculum teaching system.
Start with course assessment grade which is expressed characteristics of curriculum teaching system, using simulation method, this paper researches statistical characteristic of two main factors in curriculum teaching system, and reveals inner relation existed in factors.
In order to make statistical property trend, class size is 100 students.。
Summary (1) In curriculum teaching system, assessment grade, learning damping and teaching rhythm all submit to normal distribution approximately, which gives a well theory foundation to research muilt factors affect and interactions in curriculum teaching system
Online since: April 2015
Authors: Omar Sabbar Dahham, A.M. Mustafa Al Bakri, Azlin Fazlina Osman, Abdulkader M. Alakrach, Hussein Kalo
Furthermore, these properties were less affected by the in vitro conditions.
Ambient and In vitro Mechanical properties The mechanical properties of mLLDPE (neat and nanocomposites), before and after the in vitro treatment are summarized in Table 1.
It is worth mentioning that, the level of nanofiller dispersion, nanofiller-polymer interaction, nanofiller orientation and nanofiller content are among the factors that determine the tensile properties of the nanocomposites produced [7-9].
The smaller amount of oxidants entering the molecular chains resulted in greater retention of mechanical properties.
The best ambient and in vitro mechanical properties were achieved when 3 wt% of organo-MMT was added.
Online since: May 2020
Authors: Yuan Sheng Yang, Yi Zhang, Xiaohui Feng
The tensile tests at room temperature showed that the mechanical properties of the DSed Mg-Zn-xCa alloys were strongly affected by the content of Ca.
Mechanical Properties.
Mechanical Properties.
Table 2 Mechanical properties of DSed Mg-Zn-Ca alloy.
Jiang, calculation of schmid factors in magnesium: Analysis of deformation behaviors, Scr.
Online since: April 2014
Authors: Li Peng Zhou, Bao Liang Bai, Ming Chen Han, Mei Sheng Zhu, Pei Tong Ni
Because the alloy has complex composition, its microstructure and mechanical properties are sensitive to processing factors.
The effect of cold machining deformation rate on mechanical properties is shown in Fig.1.
The results above reveal that the mechanical properties of TB2 alloy strips in as-solutioned condition are hardly affected by cold machining deformation rate.
Fig.5 shows the effect of cold machining deformation rate on mechanical properties in as-aged condition.
(2) The deformation rate hardly affects the mechanical property in solution condition while it does have a certain contribution to the mechanical property in the solution and aging (STA) condition.
Online since: November 2011
Authors: Deepak Bhandari, Rahul Chhibber, Navneet Arora
The choice of welding electrode coatings for SMAW depends on a number of factors, including the weld material, welding position and the desired weld properties.
The comparative evaluation is made on the basis of hot cracking tests; estimation of mechanical properties and coefficient of thermal expansion.
The task is more complex than that of the welding of similar materials due to differences in the physical, chemical and mechanical properties of the base metals.
All these factors must be taken care of during welding of bimetallic joints.
The higher hydrogen content of deposited weld metal for E-3 electrode reveals the poor mechanical properties as compared to E-1 and E-2 electrode coatings.
Online since: September 2013
Authors: Zhen Li, Gang Chen, Zhao Fang Du, Wei Min Song
Key words: nonwovens; reinforced composites; mechanical properties; grey correlation; failure mechanism Abstract.
This text firstly tested the mechanical properties of composites which are composed by the reinforcement which is glass fiber nonwovens, glass fiber nonwoven felt or PE hot rolling nonwovens and unsaturated polyester resin matrix, and then used gray relative analysis method to analyze and make a comparison of mechanical properties.
Results and Discussions 2.1Experimental results Testing results of mechanical properties for the samples are shown in Table 2.
Table 2 Texting results of mechanical properties Mechanical properties Serial number 1 2 3 4 5 6 σt (Mpa) 110.65 2721.30 116.12 10.00 13.01 96.00 98.19 Et (MPa) 2927.14 3002.37 3110.29 633.53 652.27 εt (%) 1.361 1.521 0.378 0.445 2.453 2.545 Ex (Mpa) 3469.87 3650.63 3300.18 3482.22 732.24 742.62 σƒ (Mpa) 100.71 110.49 54.27 59.97 19.87 20.79 Eƒ (Mpa) 7976.41 8023.35 5000.11 5103.40 545.33 560.98 Vƒ (%) 8.54 8.96 5.98 6.35 7.23 7.71 2.2 Basic principle of gray relative analysis [9] The basic principle of gray relative analysis is seeking the internal links of some factors and identifying the factors that affect the target value by analyzing the data in gray relative system, so as to seize the key to solving the problem.
This text used the initialization method to analyze the mechanical properties of composites, and the results are shown in Table 3.
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