Biaxial Ratcheting and Cyclic Plasticity for Bree-Type Loading—Part II: Comparison Between Finite Element Analysis and Theory

[+] Author and Article Information
C. Nadarajah, H. W. Ng

School of Mechanical and Production Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 2263

J. Pressure Vessel Technol 118(2), 161-167 (May 01, 1996) (7 pages) doi:10.1115/1.2842175 History: Received January 04, 1995; Revised October 20, 1995; Online February 11, 2008


In Part I of this two part paper (Ng and Nadarajah, 1996), the results of an extensive program of finite element analyses were described. The problem being considered is the phenomenon of ratcheting and cyclic stress-strain hysteresis loop behavior in a thin-walled cylinder subject to cyclic thermal stress and sustained internal pressure. The purpose of Part II is to compare the finite element results with two analytical solutions and review the applicability of the latter as a design procedure for assessment of these types of structures. The comparison shows that the ratcheting to shakedown boundaries based on F.E. and analytical models are in close agreement. The hoop ratcheting rates predicted by the uniaxial model enveloped the F.E. and biaxial models, while for the axial ratcheting rates, the F.E. results are upper bound.

Copyright © 1996 by The American Society of Mechanical Engineers
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