Determination of Stress Concentration Factors of a Steam Turbine Rotor by FEA

Stress Concentration Factors are significant in machine design as it gives rise to localized stress when any change in the design of surface or abrupt change in the cross section occurs. Almost all machine components and structural members contain some form of geometrical or microstructural discontinuities. These discontinuities are very dangerous and lead to failure. So, it is very much essential to analyze the stress concentration factors for critical applications like Turbine Rotors. In this paper Finite Element Analysis (FEA) with extremely fine mesh in the vicinity of the blades of Steam Turbine Rotor is applied to determine stress concentration factors. A model of Steam Turbine Rotor is shown in Fig. 1.

Authors:

• R. Nagendra Babu
• K. V. Ramana
• K. Mallikarjuna Rao

Keywords:

• Stress Concentration Factors
• Finite Element Analysis
• and ANSYS.

References:

[1] R. Nagendra Babu & Dr. J. A. Tamboli(2003), "Determination of Stress
Concentration factors for Filleted Shafts in Tension using FEA",
Volume No.38, Journal of Shivaji University.
[2] Joseph Edward Shingley (1986), "Mechanical Engineering Design",
First metric edition, McGraw Hill, New York.
[3] Pandya and Shah (1994), "Machine Design", Twenty editions,
Charotakar Publishing House, Anand.
[4] Reddy. J. N. (1194), "Finite Element Methods", Tata Mc.Graw Hill,
New Delhi.
[5] Krishnamnurthy C. S. (1995), "Finite element Design Analysis theory
and Programming", Tata Mc. Graw Hill, New Delhi.
[6] Tirupathi R. Chandrupatla(2000), "Finite Elements in Engineering",
Prentice-Hall of India.
[7] C. S. Desai and J. F. Abel (19770, "Introduction to Finite Element
Method" Affiliated east west Press, New Delhi.
[8] O.C. Zienkiewich, (1994), "The Finite Element Method", Third Edition,
Tata McGraw Hill, New Delhi.