Performance evaluation of cement mortars containing marble dust and glass fiber exposed to high temperature by using Taguchi method

Arıcı, Erdinç; Keleştemur, Oğuzhan; Yıldız, Servet; Gökçer, Bihter

doi:10.1016/j.conbuildmat.2014.02.061

Cited by 105 publications

(35 citation statements)

References 20 publications

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“…For this reason, the \smaller is better (LB)" for porosity parameter was used to nd the optimal experimental conditions (Eq. (2)) [23], where S=N (Signal/Noise) is performance statistics, Y i is the performance value of ith experiment, and n is the number of recurrence done for an experimental combination. In the Taguchi approach, the experiment corresponding to optimum experiment conditions may not be done during the whole period of experimentation.…”

Section: Design and Taguchi Methodsmentioning

confidence: 99%

The effect of inadequate compaction on compressive strength of concrete exposed to elevated temperature

Gönen

2016

Scientia Iranica

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One of the important factors a ecting the quality of concrete is the placement of fresh concrete inside the formwork. Inadequate compaction is a common problem in concrete technology. In this study, the e ect of inadequate compaction on compressive strength and ultrasonic pulse velocity of concrete exposed to elevated temperature is examined. For this purpose, various compaction rates were applied during the casting stage of concrete in order to simulate various levels of inadequate compaction. Four di erent water-cement ratios (0.50, 0.40, 0.38, and 0.35) were selected. All concrete specimens were exposed to 450 or 900 C for one hour. The Taguchi approach was used to reduce the number of samples. The results were evaluated by the Analysis of Variance (ANOVA) method. Test results showed that inadequate compaction played a signi cant role, more than curing time, in the compressive strength after high temperature exposure.

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Section: Design and Taguchi Methodsmentioning

confidence: 99%

The effect of inadequate compaction on compressive strength of concrete exposed to elevated temperature

Gönen

2016

Scientia Iranica

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“…Thereafter, analysis of means (ANOM) and analysis of variance are performed on the S/N ratio of orthogonal array to identify the optimal factor level combination and estimate the error variance for the effects and variance of the prediction error, respectively (Keleştemur, Arıcı, Yıldız, & Gökçer, 2014). In this study, the eight considered control factors are as follows: (1) thermal contact conductance h tc , (2) cutting speed v c , (3) feed rate f, (4) Coulomb friction coefficient μ c , (5) shear friction coefficient μ t , (6) Taylor-Quinney coefficient κ t , (7) percentage decrease in flow stress %p, and (8) Cockcroft-Latham critical damage value D crit.…”

Section: Design Of the Fem Experimentsmentioning

confidence: 99%

Numerical modeling and optimization of machining duplex stainless steels

Koyee

Schmauder

Heisel

et al. 2015

Production & Manufacturing Research

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The shortcomings of the machining analytical and empirical models in combination with the industry demands have to be fulfilled. A three-dimensional finite element modeling (FEM) introduces an attractive alternative to bridge the gap between pure empirical and fundamental scientific quantities, and fulfill the industry needs. However, the challenging aspects which hinder the successful adoption of FEM in the machining sector of manufacturing industry have to be solved first. One of the greatest challenges is the identification of the correct set of machining simulation input parameters. This study presents a new methodology to inversely calculate the input parameters when simulating the machining of standard duplex EN 1.4462 and super duplex EN 1.4410 stainless steels. JMatPro software is first used to model elastic-viscoplastic and physical work material behavior. In order to effectively obtain an optimum set of inversely identified friction coefficients, thermal contact conductance, Cockcroft-Latham critical damage value, percentage reduction in flow stress, and Taylor-Quinney coefficient, Taguchi-VIKOR coupled with Firefly Algorithm Neural Network System is applied. The optimization procedure effectively minimizes the overall differences between the experimentally measured performances such as cutting forces, tool nose temperature and chip thickness, and the numerically obtained ones at any specified cutting condition. The optimum set of input parameter is verified and used for the next step of 3D-FEM application. In the next stage of the study, design of experiments, numerical simulations, and fuzzy rule modeling approaches are employed to optimize types of chip breaker, insert shapes, process conditions, cutting parameters, and tool orientation angles based on many important performances. Through this study, not only a new methodology in defining the optimal set of controllable parameters for turning simulations is introduced, but also the optimum set of process input variables for turning duplex stainless steels is defined.

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“…In studies [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28], the structural capacity of TRC alone (not on a different substrate) under elevated or high temperature has been investigated. However, in [12][13][14][15][16][17][18][19][20][21], the maximum temperature that was tested was 650 • C, and only in publications [22][23][24][25][26][27][28], TRC was investigated under temperatures of 700 • C-1000 • C, which corresponds to the realistic temperatures developed in case of a cellulosic fire [29]. Moreover, out of the last group of publications, only in [26,28] tests have been performed on TRC specimens according to the standard fire curve proposed by EN1363 ( [29]), while using glass or carbon fiber reinforcement, which are the most commonly used in structural applications.…”

Section: Introductionmentioning

confidence: 99%

Thermomechanical Behavior of Textile Reinforced Cementitious Composites Subjected to Fire

et al. 2019

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The mechanical behavior of textile reinforced cementitious composites (TRC) has been a topic of wide investigation during the past 30 years. However, most of the investigation is focused on the behavior under ambient temperatures, while only a few studies about the behavior under high temperatures have been conducted thus far. This paper focused on the thermomechanical behavior of TRC after exposure to fire and the residual capacity was examined. The parameters that were considered were the fiber material, the thickness of the concrete cover, the moisture content and the temperature of exposure. The specimens were exposed to fire only from one side and the residual strength was measured by means of flexural capacity. The results showed that the critical factor that affects the residual strength was the coating of the textiles and the law of the coating mass loss with respect to temperature. The effect of the other parameters was not quantified. The degradation of the compressive strength of TRC was quantified with respect to temperature. It was also concluded that a highly asymmetrical design scheme might lead to premature failure.

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Performance evaluation of cement mortars containing marble dust and glass fiber exposed to high temperature by using Taguchi method

Cited by 105 publications

References 20 publications

The effect of inadequate compaction on compressive strength of concrete exposed to elevated temperature

The effect of inadequate compaction on compressive strength of concrete exposed to elevated temperature

Numerical modeling and optimization of machining duplex stainless steels

Thermomechanical Behavior of Textile Reinforced Cementitious Composites Subjected to Fire

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