Effect of temperature on the mechanical characteristics of cold-worked steel OKh16N15M3B with active tension and creep

1985 ◽  
Vol 17 (11) ◽  
pp. 1565-1569
Author(s):  
V. S. Erasov ◽  
E. N. Pirogov ◽  
V. P. Konoplenko
Keyword(s):  
Mechanical Characteristics ◽  
Effect Of Temperature ◽  
Active Tension ◽  
Cold Worked ◽  
Steel Okh16n15m3b

The Mechanical Characteristics and Sealing Performance Evaluation of Bolted Pipe Flange Connections With Metallic Flat Gaskets Subjected to Internal Pressure

2016 ◽  
Author(s):  
Koji Kondo ◽  
Koji Sato ◽  
Satomi Takahashi ◽  
Toshiyuki Sawa
Keyword(s):  
Plastic Deformation ◽  
Mechanical Characteristics ◽  
Experimental Results ◽  
Leak Rate ◽  
Effect Of Temperature ◽  
Load Factor ◽  
Stress Distributions ◽  
Bolt Preload ◽  
Sealing Performance ◽  
Higher Temperature

Bolted pipe flange connections with metallic gaskets have been used under higher pressure as well as higher temperature. However, a few researches on the mechanical characteristics in connections with metallic gaskets have been carried out. It is necessary to examine the mechanical characteristics such as the contact gasket stress distributions which govern the sealing performance, the deformation of the metallic gaskets, changes in axial bolt forces and the hub stress under higher pressure and temperature. In the present paper, the objectives are to examine the changes in axial bolt forces, the hub stress and the contact gasket stress distributions and the sealing performance of the pipe flange connections with metallic flat gaskets. Firstly, the mechanical characteristics of the connections under higher pressure are analyzed using FEA. Then, experiments were carried out to measure the load factor, the hub stress and the leak rate (the sealing performance). The relationship between the average contact gasket stress and the leak rate was measured using platen device at room temperature. The FEA results are fairly coincided with the experimental results. It is shown that the leak rate decreases as the contact gasket stress increases and when the plastic deformation of gaskets occurs, the sealing performance increases. The leak rate was measured in the range of 10−4∼10−7 [Pa·m3/s]. It is found that the sealing performance increases as the gasket width increase in the elastic deformation range while it is independent of the gasket width when the plastic deformation occurs. The effect of temperature on the mechanical characteristics of the connection is also examined. The FEA results are in a fairly good agreement with the experimental results. It is found that the sealing performance increases as the temperature increases. In addition, a method how to determine the bolt preload for increasing the sealing performance is proposed.

Effect of temperature on the mechanical properties of cold-worked OKh16N15M3BR steel during plastic deformation

1990 ◽  
Vol 68 (4) ◽  
pp. 280-283
Author(s):  
A. B. Ankudinov ◽  
E. N. Pirogov ◽  
I. P. Alpatov ◽  
A. V. Medvedev
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Effect Of Temperature ◽  
Cold Worked

scholarly journals Choosing the function of mechanical properties of grounds and rock formations due to their heterogeneity

2018 ◽  
Vol 33 ◽  
pp. 02024 ◽  
Author(s):  
Irina Frolova ◽  
Murad Agakhanov
Keyword(s):  
Mechanical Characteristics ◽  
Soil Surface ◽  
Effect Of Temperature ◽  
Underground Structures ◽  
High Rise ◽  
Nonhomogeneous Media ◽  
Rock Formations ◽  
Real Material ◽  
Temperature Deformations ◽  
Objective Property

The development of computing techniques to analyze underground structures, buildings in high-rise construction that would fully take account of the conditions of their design and operation, as well as the real material properties, is one of the important trends in structural mechanics. For the territory in high-rise construction it is necessary to monitor the deformations of the soil surface. When high-rise construction is recommended to take into account the rheological properties and temperature deformations of the soil, the effect of temperature on the mechanical characteristics of the surrounding massif. Similar tasks also arise in the creation and operation of underground parts of high-rise construction, which are used for various purposes. These parts of the structures are surrounded by rock massifs of various materials. The actual mechanical characteristics of such materials must be taken into account. The objective property of nearly all materials is their non-homogeneity, both natural and technological. The work addresses the matters of building nonhomogeneous media initial models based on the experimental evidence. This made it possible to approximate real dependencies and obtain the appropriate functions in a simple and convenient way.

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