Plastic Behavior of Steam Turbine Low Pressure Part

František Straka; Pavel Pánek; Pavel Albl

doi:10.4028/www.scientific.net/AMM.827.197

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 827Plastic Behavior of Steam Turbine Low Pressure...

Plastic Behavior of Steam Turbine Low Pressure Part

Abstract:

Low-pressure steam turbine parts are generally exposed to lowest steam parameters only and it could seem that they should not be susceptible to permanent deformation. However, this assumption is incorrect and permanent changes in geometry become visible in low-pressure turbine casings when they are disassembled after the first time in operation. The driving mechanism of the plastic deformation of the low-pressure casings is mainly the non-uniform temperature field. This paper deals with results obtained from a numerical FEM simulation of a steam turbine low pressure part, which includes elastic-plastic behavior of the material, and results measured under the real conditions.

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Periodical:

Applied Mechanics and Materials (Volume 827)

Pages:

197-200

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.827.197

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Online since:

February 2016

Authors:

František Straka*, Pavel Pánek, Pavel Albl

Keywords:

Deformation, Plastic, Pressure, Temperature

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References

[1] A. Öchsner, Elasto-Plasticity of Frame Structure Elements, Southport, Springer, (2014).

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[2] F. Straka, P. Albl, P. Pánek, Creep Analysis of High Pressure Steam Turbine Part (2014), ed. P. Polach, Czech Society for Mechanics – Experimental Stress Analysis, Mariánské Lázně.

DOI: 10.4028/www.scientific.net/amm.732.187

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[3] Retrieved from: https: /support. ansys. com.

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