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Online since: July 2011
Authors: Ana Trombeva-Gavriloska, Meri Cvetkovska, Viktor Gavriloski, Todorka Samardzioska
Strain data were determinate using strain gage in longitudinal direction.
The HBM Spider 8 and software HBM CATMAN 4.0 were used for data acquisition.
As a result of reduction of the module of elasticity, caused by temperature depend behaviour of the polymer matrix, increased strain of the composite materials tested at increased temperature could be noticed.
The results show that internal stresses in the composite material between matrix and fibers, caused by different temperature strains, lead to reduction of the ultimate tensile strength of FRP specimens tested at increased temperature.
Online since: February 2014
Authors: Hong Zhou, Fu Ming Zhang, Tao Zhang
The cooling beam of ASK shell is applied in the design, aim to reduce the heat conduction between lining wall and shell steel structure of ASK, thus avoid the higher temperature fluctuation of refractory lining during the ASK shutdown because of heat supply significant reduction.
Table 2 Major technical-economic parameters of 600t/d ASK Item Design data Actual data in 2010 Limestone (t/t) 1.8 1.7 Heat consumption (kJ /kg) 4096 3980 Power consumption (kWh/t) 28.0 27.0 Activity of lime (ml 4N-HCl) ≥350 380 CO2 remains (%) ≤2.0 1.03 Qualified ratio (%) >95 99 Water consumption (m3/t) 0.39 0.30 Power consumption (kWh/t) 28 27 Compressed air (Nm3/t) 50 43.49 BOF gas (Nm3/t) 576 553 Synthesis energy consuption (kgce/t) 165 139.95 ASK compared to other type kiln, the most remarkable feature is the recovery and utilization of waste heat technology.
The high-temperature exhaust heat can be recovered through the heat exchanger to preheat driving air, circulating air temperature is increased, thereby reducing consumption of BOF gas in combustion chamber, achieve the goal of energy saving and consumption reduction, refer to Fig. 3.
Online since: May 2023
Authors: Surasak Suranuntchai, Nattarawee Siripath, Sedthawatt Sucharitpwatskul
Mass Ratio (W) Billet mass (kg) Billet Volume (mm3) Scrap Volume (mm3) Length (mm) Weight Reduction (%) 1.34 2.260 289,730.78 73,513.78 160.00 0 1.32 2.226 285,406.44 69,189.44 157.66 5.882 1.30 2.192 281,082.10 64,865.10 155.27 11.76 1.28 2.159 276,757.76 60,540.76 152.88 17.65 1.26 2.125 272433.42 56216.42 150.49 23.53 FE Simulation of Upper Ball joint.
To verify the accuracy of the FEM results, these results were compared to the experimental data in terms of forging load in roughing and finishing operation and were found to be in good agreement.
The results of the forging load revealed a maximum error about 10.13% from the experiment data.
The use of FEM to determine the initial billet size resulted in a reduction in the mass of the initial billet as well as a minimization in cost and material waste.
Online since: December 2008
Authors: Tatsuki Ohji, Naoki Kondo, Hideki Kita, Hideki Hyuga
Based on these considerations, we carried out an exergy analysis for ceramic parts in order to clarify the value of environmental impact reduction throughout their life cycles and to develop a design policy for a highly efficient ceramics production process.
In this study, analysis was conducted based on large ceramic heater protection tubes used in aluminum casting and we estimated the amount of exergy consumed in the manufacturing process, then the reduction in environmental impact when ceramic heat-tubes were used, compared to conventional steel tubes.
Specific exergy can be obtained from the data on materials and energy.
MALT (Netsuriki-Gaku Data Base), Kagaku Gijyutsu-Sya [11] Z.
Online since: November 2011
Authors: Ling Sun, Dong Lei Liu
Analysis and Discussion on Test Results Experimental Data and Curves.
The curves of the influence trend of each technological parameter on the product mass obtained from the measured data in test are shown as Figures2 to 7.
Figure 3 indicates that the product mass reaches to the maximum when melting temperature reaches to around 230℃, because the rising of melting temperature may lead to reduction of melt viscosity and pressure loss and the less lost pressure will facilitate the effective filling of fine structures of mold cavity by fused mass.
However, the reduction of product mass afterwards shall be regarded as the result of fused mass with extremely low viscosity’s failure in compaction under pressure and its overflow from mold cavity clearances.
Online since: December 2010
Authors: Xi Lin Lu, Bin Zhou, Xiao Song Ren
Vibration Analysis and Evaluation of the Indoor Spiral Steel Stair Bin Zhou1,a , Xiaosong Ren2,b and Xilin Lu1,c 1State Key Laboratory of Disaster Reduction in Cilvil Engineering, Tongji University, Shanghai 200092, China 2Research Institute of Structural Engineering and Disaster Reduction, Tongji University, Shanghai 200092, China aemail: ebinzb@163.com, bemail: rxs@tongji.edu.cn, cemail: lxlst@tongji.edu.cn Keywords: Indoor Spiral Steel Stair; Analysis; Load Model; Evaluation; Natural Frequency; Peak Value; Weighted Root-Mean-Square (R.M.S) Value Abstract.
The experimental data suggested that the frequency of walking in ascending or descending the stair is about 1.6Hz, while the frequency of running in ascending and descending the stair is about 3.5Hz and 4.3Hz respectively[1].
Table5 The calculation parameters in vibration analysis Parameters Content Value G Static weight of person 750N fpw Frequency of one person walking in the process of ascending or descending the stair 1.6Hz σpw Reference variance of one person walking 0.2Hz fpr-a Frequency of one person running in the process of ascending the stair 3.5Hz fpr-d Frequency of one person running in the process of descending the stair 4.3Hz σpr Reference variance of one person running 0.4Hz aw1-a Value of the first Fourier coefficient of walking ascending the stair 0.43 aw2-a Value of the first Fourier coefficient of walking ascending the stair 0.18 aw1-d Value of the first Fourier coefficient of walking ascending the stair 0.59 aw2-d Value of the first Fourier coefficient of walking ascending the stair 0.23 ar1-a Value of the first Fourier coefficient of running ascending the stair 0.92 ar1-d Value of the first Fourier coefficient of running descending the stair 0.87 According to the distribution data presented
Online since: September 2019
Authors: Anna Perminova, Julija S. Karzina, Maxim Yu. Zamozdra
Introduction Magnesium-based alloys in physical and mechanical characteristics successfully compete with other lightweight construction materials, primarily in those areas where weight reduction is of paramount importance [1].
Based on the experimental data on pressing of non-porous blanks, three modes - 300, 350, 400 ° C were chosen as the working temperatures of the extrusion process.
As follows from these data, the hardness values ranged from 75 to 100 HBW, and the residual porosity ranged from 0.5 to 1.7%.
The higher the temperature, the more pressure must be applied to break the specimens, and the smaller the reduction (the larger the die diameter), the higher the tensile strength.
Online since: August 2024
Authors: Mario Saggio, Alfio Guarnera, Mario Pulvirenti, Daniela Cavallaro, Luciano Salvo, Alessandra Cascio, Alessandra Raffa, Edoardo Zanetti, Angelo Sciacca
Modeling Flow Description and New SiC MOSFET Layout Proposal Simulation approach A modelling strategy based on the concept of system complexity reduction has been applied to SiC power MOSFET [2], [3].
Table I Switching losses data for STD and new layout at 25°C Table II Switching losses data for STD and new layout at 200°C (a) (b) Fig. 5.
Greco, System complexity reduction approach in the modelling of a discrete power, in Proceedings of the 2018, Power Conversion and Intelligent Motion (International Conference on Power Control)
Online since: April 2013
Authors: Zheng Yi Jiang, Jing Tao Han, Guo Liang Xie, Qiang Song Wang, Xu Jun Mi, Bai Qing Xiong, Jing Liu
Then the slabs were reheated to 1150 °C for 1h, and hot rolled into composite plates of 5.5 mm thick with pass reduction of 20 - 35 %, in the temperature range of 950-1150 °C.
The dendritic structures are broken into small rod-shaped particles of 18 - 30 μm in length during the hot rolling process of high cumulative reduction, owing to the embrittlement of these structures.
Table 2 The crystallographic data of hot rolled boron alloyed stainless steel.
The crystallographic data regarding the phases in Fig. 4 are presented in Table 2.
Online since: October 2009
Authors: Federico Tordini, Sergio Baragetti, Stefano Cavalleri
Introduction The need for lightening mechanical components by broad use of light alloys is becoming more and more necessary, especially if the power increase and the reduction of gas emissions in the automotive and aerospace fields are concerned.
The numerical models enabled the collection of data necessary to evaluate the stress intensity factors and the crack propagation direction.
The better behaviour of the titanium alloy substrate highlighted with the calculations should be due to both the higher friction coefficient resulting in the reduction of the relative crack face slip and the lower value of elastic modulus.
Acknowledgments The Authors wish to thank DUCATI CORSE srl for the drawings and the data on the spur gears.
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