A New Experimental Method to Study Combined Fatigue of Actual Turbine Disk Mortise Teeth at Elevated Temperatures

1997 ◽  
Vol 119 (4) ◽  
pp. 969-972 ◽  
Author(s):  
Rongqiao Wang ◽  
Jingxu Nie
Keyword(s):  
Elevated Temperature ◽  
Temperature Control ◽  
High Frequency ◽  
Elevated Temperatures ◽  
Local Heating ◽  
Experimental System ◽  
Turbine Disk ◽  
Combined Loading ◽  
Experimental Result ◽  
High Frequency Induction

This paper presents a new experimental system to study the L-HCCF of an actual turbine disk mortise teeth at elevated temperature, using an actual disk as experimental component. This system ingeniously achieves combined loading (simulating low cycle radial centrifugal force and high cycle crosswise vibration of blade), high-frequency induction local heating (550°C constant temperature), control of high cycle vibrating frequency and amplitude, and crack real-time detection. The experimental result is identical with the practical flight failure. This method can be easily popularized to study the L-HCCF of many components.

scholarly journals A New Experimental Method of Combined Fatigue of Actual Turbine Disk Mortise Teeth at Elevated Temperature

1996 ◽  
Author(s):  
Rongqiao Wang ◽  
Jingxu Nie
Keyword(s):  
Elevated Temperature ◽  
Experimental Method ◽  
Real Time ◽  
High Frequency ◽  
Local Heating ◽  
Experimental System ◽  
Turbine Disk ◽  
Combined Loading ◽  
Experimental Result ◽  
High Frequency Induction

For studying the L-HCCF of an actual turbine disk mortise teeth at elevated temperature, this paper presents a new experimental system, using actual disk as experimental component, ingeniously achieving the combined loading (simulating low cycle radial centrifugal force and high cycle crosswise vibration of blade), the high-frequency induction local heating (550 °C constant temperature), the control of high cycle vibrating frequency and amplitude, and the crack real-time detection. The experimental result is identical with the practical flight failure. This method can be easily popularized for the L-HCCF studying of many components.

Influence of elevated temperature on alkali-activated ground granulated blast furnace slag concrete

2019 ◽  
Vol 11 (2) ◽  
pp. 247-260
Author(s):  
Virendra Kumar ◽  
Amit Kumar ◽  
Brajkishor Prasad
Keyword(s):  
Blast Furnace ◽  
Elevated Temperature ◽  
Blast Furnace Slag ◽  
Elevated Temperatures ◽  
Experimental Result ◽  
Content Type ◽  
Granulated Blast Furnace Slag ◽  
New Type ◽  
Furnace Slag ◽  
Alkali Activated

Purpose This paper aims to present an experimental investigation on the performances of alkali-activated slag (AAS) concrete and Portland slag cement (PSC) concrete under the influence of elevated temperature. In the present study, the alkali-activated binder contains 85% of ground granulated blast furnace slag (GGBFS) and 15% of powder blended as chemical activators. Design/methodology/approach For the purpose, standard size of cube, cylinder and prism have been cast for a designed mix of concrete. The AAS concrete specimens were kept for water as well as air curing. After attaining the maturity of 28 days, the samples were first exposed to different elevated temperatures, i.e. 100°C, 200°C, 300°C, 400°C, 500°C, 600°C, 700°C and 800°C. Later on, the tests were conducted on these samples to find the change in weight and the residual strength of the concrete. Findings After 500°C exposure, a considerable amount of the strength loss has been observed for AAS concrete. It has been evaluated that the performance of AAS concrete is better than that of the PSC concrete at elevated temperature. Research limitations/implications The present research work is being applied on the material for which the experimental result has been obtained. Practical implications The author has tried to develop a new type of binder by using steel industry waste material and then tested at elevated temperature to sustain at high temperatures. Social implications This research may give a social impact for developing mass housing project with a lower cost than that of using a conventional binder, i.e. cement. Originality/value A new type of binder material is being developed.

Rapid Sintering and Synthesis of Nanostuctured FeCrAlSi-Al2O3 Composite by High-Frequency Induction Heating

2011 ◽  
Vol 49 (03) ◽  
pp. 231-236 ◽  
Author(s):  
Song-Lee Du ◽  
Sung-Hun Cho ◽  
In-Yong Ko ◽  
Jung-Mann Doh ◽  
Jin-Kook Yoon ◽  
...  
Keyword(s):  
Induction Heating ◽  
High Frequency ◽  
Al2o3 Composite ◽  
Rapid Sintering ◽  
High Frequency Induction

In-situ compaction and sintering of Al2O3 – GNP nanoparticles using a high-frequency induction system

2018 ◽  
Vol 60 (7-8) ◽  
pp. 727-732
Author(s):  
Uğur Çavdar ◽  
İ. Murat Kusoglu ◽  
Ayberk Altintas
Keyword(s):  
High Frequency ◽  
Induction System ◽  
High Frequency Induction

VOLUME TEMPERATURE CONTROL AT AUTOMATED HIGH-FREQUENCY PROCESSING OF POLYMER AND COMPOSITE MATERIALS

2020 ◽  
Vol 21 (2) ◽  
pp. 155-162
Author(s):  
V. S. Bychkovsky ◽  
◽  
D. V. Butorin ◽  
D. V. Bakanin ◽  
N. G. Filippenko ◽  
...  
Keyword(s):  
Composite Materials ◽  
Temperature Control ◽  
High Frequency ◽  
Frequency Processing

scholarly journals Evaluation of Heating Technique of Deformed Reinforcement Using High-Frequency Induction Heating System

2021 ◽  
Vol 11 (11) ◽  
pp. 4947
Author(s):  
Myung-hwan Lim ◽  
Changhee Lee
Keyword(s):  
Reinforced Concrete ◽  
Temperature Rise ◽  
High Frequency ◽  
Thermal Conduction ◽  
Rapid Heating ◽  
Heating System ◽  
Inductive Heating ◽  
Reinforced Steel ◽  
Induction Heating System ◽  
High Frequency Induction

To improve recycling quality, it is necessary to develop a demolition technology that can be combined with existing crushing methods that employ large shredding-efficient equipment. The efficient collection of bones in a segmentation dismantling method must be considered according to the procedure. Furthermore, there is a need for the development of partial dismantling technologies that enable efficient remodeling, maintenance, and reinforcement. In this study, we experimentally investigated the temperature-rise characteristics of reinforced concrete through partial rapid heating during high-frequency induced heating. Accordingly, the chemical and physical vulnerability characteristics of the reinforced concrete were verified by studying the thermal conduction on the surface of the rebars and the cracks caused by the thermal expansion pressure of the rebars. Furthermore, we aimed to verify the applicability of the proposed technology by specifying the vulnerability range of the reinforced concrete based on the heating range, as well as the appropriate energy consumption. We investigated the temperature rise and temperature distribution characteristics of the rebar surfaces based on diameter, length, bar placement conditions, heating distance, heating coil location, and output, using reinforced steel of grade SD345. Maximum powers of 5, 6, and 10 kW, and inductive heating were used to achieve satisfactory results.

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