Table of Content

Open Access

ARTICLE

Sequential Limit Analysis of Rotating Hollow Cylinders of Nonlinear Isotropic Hardening

S.-Y. Leu1, J.T. Chen2
Hydraulic Engineering Department, Sinotech Engineering Consultants, Ltd., 171 Sec. 5 Nanking E. Rd., Taipei 105, Taiwan. Email: syleu@mail.sinotech.com.tw
Distinguished Professor, Department of Harbor and River Engineering, National Taiwan Ocean University, Keeling, Taiwan.

Computer Modeling in Engineering & Sciences 2006, 14(2), 129-140. https://doi.org/10.3970/cmes.2006.014.129

Abstract

Plastic limit angular velocity of rotating hollow cylinders made of the von Mises materials with nonlinear isotropic hardening is investigated numerically and analytically in the paper. The paper applies sequential limit analysis to deal with the rotating problems involving hardening material property and weakening behavior resulted from the widening deformation. By sequential limit analysis, the paper treats the plasticity problems as a sequence of limit analysis problems stated in the upper bound formulation. Rigorous upper bounds are acquired iteratively through a computational optimization procedure with the angular velocity factor as the objective function. Especially, rigorous validation was conducted by numerical and analytical studies of rotating hollow cylinders in terms of the plastic limit angular velocity as well as the onset of instability. It is found that the computed limit angular velocities are rigorous upper bounds and agree very well with the analytical solutions.

Keywords

Sequential limit analysis, Plastic limit angular velocity, Rotating cylinder, von Mises criterion, Nonlinear strain-hardening, Instability.

Cite This Article

Leu, S., Chen, J. (2006). Sequential Limit Analysis of Rotating Hollow Cylinders of Nonlinear Isotropic Hardening. CMES-Computer Modeling in Engineering & Sciences, 14(2), 129–140.



This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
  • 686

    View

  • 517

    Download

  • 0

    Like

Share Link

WeChat scan