Automotive turbocharger components frequently experience complex thermomechanical fatigue (TMF) loadings which require estimation of nonlinear plastic stresses for fatigue life calculations. These field duty cycles often contain rapid fluctuations in temperatures and consequently transient effects become important. Although current finite element (FE) software are capable of performing these nonlinear finite element analyses, the turnaround time to compute nonlinear stresses for complex field duty cycles is still quite significant and detailed design optimizations for different duty cycles become very cumbersome. In recent years, a large number of studies have been made to develop analytical methods for estimating nonlinear stress from linear stresses. However, a majority of these consider isothermal cases which cannot be directly applied for thermomechanical loading. In this paper a detailed study is conducted with two different existing analytical approaches (Neuber’s rule and Hoffman-Seeger) to estimate the multiaxial nonlinear stresses from linear elastic stresses. For the Neuber’s approach, the multiaxial version proposed by Chu was used to correct elastic stresses from linear FE analyses. In the second approach, Hoffman and Seeger’s method is used to estimate the multiaxial stress state from plastic equivalent stress estimated using Neuber’s method for uniaxial stress. The novelty in the present work is the estimation of nonlinear stress for bilinear kinematic hardening material model under varying temperature conditions. The material properties including the modulus of elasticity, tangent modulus and the yield stress are assumed to vary with temperature. The application of two analytical approaches were examined for proportional and nonproportional TMF loadings and suggestions have been proposed to incorporate temperature dependent material behavior while correcting the plasticity effect into linear stress. This approach can be effectively used for complex geometries to calculate nonlinear stresses without carrying out a detailed nonlinear finite element analysis.
Skip Nav Destination
Article navigation
October 2012
Gas Turbines: Structures And Dynamics
Analytical Correction of Nonlinear Thermal Stresses Under Thermomechanical Cyclic Loadings
Sarendra Gehlot,
Sarendra Gehlot
Honeywell Technology Solutions Lab
, Bangalore, India
560076
Search for other works by this author on:
Pradeep Mahadevan,
Pradeep Mahadevan
Honeywell Technology Solutions Lab
, Bangalore, India
560076
Search for other works by this author on:
Ragupathy Kannusamy
Ragupathy Kannusamy
Honeywell Technology Solutions Lab
, Bangalore, India
560076
Search for other works by this author on:
Sarendra Gehlot
Honeywell Technology Solutions Lab
, Bangalore, India
560076
Pradeep Mahadevan
Honeywell Technology Solutions Lab
, Bangalore, India
560076
Ragupathy Kannusamy
Honeywell Technology Solutions Lab
, Bangalore, India
560076J. Eng. Gas Turbines Power. Oct 2012, 134(10): 102505 (7 pages)
Published Online: August 22, 2012
Article history
Received:
June 29, 2012
Revised:
July 9, 2012
Online:
August 22, 2012
Published:
August 22, 2012
Citation
Gehlot, S., Mahadevan, P., and Kannusamy, R. (August 22, 2012). "Analytical Correction of Nonlinear Thermal Stresses Under Thermomechanical Cyclic Loadings." ASME. J. Eng. Gas Turbines Power. October 2012; 134(10): 102505. https://doi.org/10.1115/1.4007113
Download citation file:
73
Views
Get Email Alerts
Cited By
A Multi-Stage Nonlinear Method for Aeroengine Health Parameter Estimation Based on Adjacent Operating Points
J. Eng. Gas Turbines Power
A Combined Experimental and Turbulence-Resolved Modeling Approach for Aeroengine Turbine Rim Seals
J. Eng. Gas Turbines Power (August 2024)
Related Articles
Investigation of Thermal Stress Variability Due to Microstructure in Thin Aluminum Films
J. Appl. Mech (January,2011)
Experimental and Numerical Characterization of the Cyclic Thermomechanical Behavior of a High Temperature Forming Tool Alloy
J. Manuf. Sci. Eng (October,2010)
Constitutive Modeling of Inelastic Solids for Plastic Flow Processes Under Cyclic Dynamic Loadings
J. Eng. Mater. Technol (April,1999)
Boundary Element Formulation for Thermal Stresses During Pulsed Laser Heating
J. Appl. Mech (May,2001)
Related Proceedings Papers
Related Chapters
Thermal Creep of Irradiated Zircaloy Cladding
Zirconium in the Nuclear Industry: Fourteenth International Symposium
Microstructure Evolution and Physics-Based Modeling
Ultrasonic Welding of Lithium-Ion Batteries
Flexibility Analysis
Process Piping: The Complete Guide to ASME B31.3, Third Edition